AAT


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
dei:LegalEntity

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
dei:LegalEntity
dei:LegalEntity, us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EarningsPerShareBasic
dei:LegalEntity

us-gaap:EarningsPerShareDiluted
dei:LegalEntity

us-gaap:EarningsPerShareBasicAndDiluted
dei:LegalEntity

us-gaap:ComprehensiveIncomeNetOfTax
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
dei:LegalEntity

us-gaap:CostsAndExpenses
dei:LegalEntity

us-gaap:GainsLossesOnExtinguishmentOfDebt
dei:LegalEntity
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:GeneralAndAdministrativeExpense
dei:LegalEntity

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid

us-gaap:InterestExpense
dei:LegalEntity

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
dei:LegalEntity

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
dei:LegalEntity

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:OperatingExpenses
dei:LegalEntity

us-gaap:OperatingIncomeLoss
dei:LegalEntity
us-gaap:StatementBusinessSegments

us-gaap:OtherNonoperatingIncomeExpense
dei:LegalEntity

us-gaap:ProfitLoss
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementBusinessSegments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:Revenues
dei:LegalEntity

us-gaap:Assets
dei:LegalEntity

us-gaap:Liabilities
dei:LegalEntity

us-gaap:LiabilitiesAndStockholdersEquity
dei:LegalEntity

us-gaap:StockholdersEquity

us-gaap:CashAndCashEquivalentsAtCarryingValue
dei:LegalEntity

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
dei:LegalEntity
us-gaap:InvestmentType
us-gaap:Land
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments
us-gaap:InvestmentType
us-gaap:FurnitureAndFixturesGross
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:ConstructionInProgressGross
dei:LegalEntity
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssets
dei:LegalEntity

us-gaap:LongTermDebt
dei:LegalEntity, us-gaap:LongtermDebtType

us-gaap:MinorityInterest

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
dei:LegalEntity

us-gaap:MinorityInterest

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
dei:LegalEntity

us-gaap:DepreciationDepletionAndAmortization
dei:LegalEntity

us-gaap:IncreaseDecreaseInAccountsReceivable
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInOperatingActivities
dei:LegalEntity

us-gaap:NetIncomeLoss
dei:LegalEntity

us-gaap:ProfitLoss
dei:LegalEntity
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation
dei:LegalEntity

us-gaap:NetCashProvidedByUsedInInvestingActivities
dei:LegalEntity
dei:LegalEntity, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:SubsequentEventType
us-gaap:PaymentsToAcquireProductiveAssets

us-gaap:NetCashProvidedByUsedInFinancingActivities
dei:LegalEntity

us-gaap:PaymentsOfDividends
dei:LegalEntity

us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:DeferredTaxLiabilities

aat:AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments
dei:LegalEntity
us-gaap:RelatedPartyTransactionsByRelatedParty
aat:AmountRecoveredForReimbursementsOfOperatingExpenseForRelatedParty

aat:CapitalExpendituresandLeasingCommissions
us-gaap:StatementBusinessSegments

aat:DeferredRentRepaymentsCOVID19

aat:DeferredRentRepaymentsCOVID19Percentage

aat:DeferredRentRevenueAndAmortizationOfLeaseIntangibles
dei:LegalEntity

aat:DirectCostsOfLeasedPropertyLessorExpense

aat:IncreaseDecreaseAccruedConstructioninProgress

aat:IncreaseDecreaseAccruedLeasingCommissions

aat:IncreaseDecreaseinSecurityDepositsPayable
dei:LegalEntity

aat:IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits

aat:LeaseConcessions
us-gaap:StatementBusinessSegments
aat:LeaseRentalIncome

aat:MinorityInterestInContinuingOperationsIncomeLossOperatingPartnerships

aat:MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted

aat:NetIncomeAttributableToRestrictedShare
dei:LegalEntity

aat:OtherNoncashInterestExpense
dei:LegalEntity

aat:OtherRealEstateRentalRevenue
dei:LegalEntity
aat:PaymentsRelatedToPartnershipContribution

aat:PercentageOfInvestmentInRelatedParty
us-gaap:StatementBusinessSegments
aat:PropertyExpenses

aat:RentConcessionsCOVID19

aat:RentConcessionsCOVID19Percentage
dei:LegalEntity, us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
aat:WeightedAverageUnvestedParticipatingSecuritiesOutstanding

us-gaap:AmortizationOfAboveAndBelowMarketLeases

us-gaap:AmortizationOfFinancingCostsAndDiscounts
dei:LegalEntity

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1

us-gaap:CostOfOtherPropertyOperatingExpense
dei:LegalEntity

us-gaap:CostOfPropertyRepairsAndMaintenance

us-gaap:DepreciationAndAmortization
dei:LegalEntity

us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment
dei:LegalEntity

us-gaap:ExciseAndSalesTaxes

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
dei:LegalEntity

us-gaap:IncreaseDecreaseInLeaseAcquisitionCosts
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherDeferredLiability
dei:LegalEntity

us-gaap:IncreaseDecreaseInOtherOperatingAssets
dei:LegalEntity

us-gaap:InterestAndOtherIncome

us-gaap:InterestCostsCapitalizedAdjustment

us-gaap:InterestCostsIncurred

us-gaap:LeaseCost

us-gaap:LeaseIncome

us-gaap:LossOnContractTerminationForDefault

us-gaap:ManagementFeeExpense

us-gaap:MarketingExpense
dei:LegalEntity
us-gaap:NetIncomeLossAllocatedToGeneralPartners

us-gaap:NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeaseLeaseIncome
dei:LegalEntity
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeaseVariableLeaseIncome
dei:LegalEntity, us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax
dei:LegalEntity, us-gaap:DerivativeInstrumentRisk, us-gaap:PartnerCapitalComponents
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
dei:LegalEntity
dei:LegalEntity, us-gaap:DebtInstrument
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:IncomeStatementLocation
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:PartnerCapitalComponents
dei:LegalEntity, us-gaap:IncomeStatementLocation
dei:LegalEntity, us-gaap:PartnerCapitalComponents
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:IncomeStatementLocation
us-gaap:DebtInstrument, us-gaap:StatementEquityComponents
us-gaap:IncomeStatementLocation
us-gaap:StatementEquityComponents

us-gaap:OtherCostOfOperatingRevenue

us-gaap:OtherNoncashIncomeExpense
dei:LegalEntity

us-gaap:OtherNonoperatingExpense

us-gaap:OtherOperatingIncome
dei:LegalEntity
dei:LegalEntity
us-gaap:PartnersCapitalAccountDistributions
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnersCapitalAccountExchangesAndConversions
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
dei:LegalEntity
us-gaap:PartnersCapitalAccountUnitBasedCompensation
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PaymentsForCapitalImprovements
dei:LegalEntity

us-gaap:PaymentsOfDebtIssuanceCosts
dei:LegalEntity
dei:LegalEntity, us-gaap:DebtInstrument
us-gaap:ProceedsFromDebtNetOfIssuanceCosts
us-gaap:SubsequentEventType

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt
dei:LegalEntity

us-gaap:ProceedsFromUnsecuredLinesOfCredit
dei:LegalEntity

us-gaap:ProvisionForLeaseLosses
dei:LegalEntity

us-gaap:RealEstateTaxExpense
dei:LegalEntity
us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

us-gaap:RepaymentsOfLinesOfCredit
dei:LegalEntity
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

us-gaap:RepaymentsOfSecuredDebt
dei:LegalEntity

us-gaap:RepaymentsOfUnsecuredDebt
dei:LegalEntity

us-gaap:RestrictedStockExpense

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueConversionOfUnits

us-gaap:StraightLineRent

us-gaap:SubleaseIncome

aat:DeferredRentCredits

aat:DeferredRentExpenseAndLeaseIntangible

aat:LeaseIncentiveAccumulatedAmortization

aat:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

aat:LessorOperatingLeasePaymentToBeReceivedAfterYearFour
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario
aat:StatedFutureMonthlyLeaseRate

aat:TransferTaxesLiability

dei:EntityNumberOfEmployees

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances

srt:RealEstateFederalIncomeTaxBasis

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent
dei:LegalEntity

us-gaap:AccountsReceivableNet
dei:LegalEntity

us-gaap:AccumulatedAmortizationDeferredFinanceCosts
dei:LegalEntity, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType

us-gaap:AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables

us-gaap:AllowanceForDoubtfulAccountsReceivable
dei:LegalEntity, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:SubsequentEventType
us-gaap:AreaOfRealEstateProperty

us-gaap:BelowMarketLeaseAccumulatedAmortization

us-gaap:BelowMarketLeaseAmortizationIncomeAfterYearFive

us-gaap:BelowMarketLeaseAmortizationIncomeNextTwelveMonths

us-gaap:BelowMarketLeaseAmortizationIncomeYearFive

us-gaap:BelowMarketLeaseAmortizationIncomeYearFour

us-gaap:BelowMarketLeaseAmortizationIncomeYearThree

us-gaap:BelowMarketLeaseAmortizationIncomeYearTwo

us-gaap:BelowMarketLeaseGross

us-gaap:BelowMarketLeaseNet
us-gaap:InvestmentType
us-gaap:BuildingsAndImprovementsGross
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:CashUninsuredAmount
us-gaap:InvestmentType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount
dei:LegalEntity, us-gaap:LongtermDebtType
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk
us-gaap:DebtInstrumentInterestRateEffectivePercentage
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent

us-gaap:DeferredCostsLeasingAccumulatedAmortization

us-gaap:DeferredCostsLeasingNet

us-gaap:DeferredCreditsAndOtherLiabilities
dei:LegalEntity

us-gaap:DeferredFinanceCostsNet
dei:LegalEntity, us-gaap:LongtermDebtType

us-gaap:DeferredRentCredit

us-gaap:DeferredRentReceivablesNet
dei:LegalEntity

us-gaap:DeferredRevenue
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeFixedInterestRate
dei:LegalEntity, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilities
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases

us-gaap:FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
dei:LegalEntity
us-gaap:GeneralPartnersCapitalAccount

us-gaap:IncentiveToLessee

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue
dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency

us-gaap:LandAvailableForDevelopment
dei:LegalEntity
us-gaap:InvestmentType
us-gaap:LandImprovements
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency
dei:LegalEntity
us-gaap:LimitedPartnersCapitalAccount

us-gaap:LineOfCredit
dei:LegalEntity
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType
us-gaap:LongTermDebtFairValue
us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
dei:LegalEntity, us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners
us-gaap:Ownership
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents
us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByParent

us-gaap:NotesPayable
us-gaap:StatementBusinessSegments

us-gaap:OffMarketLeaseUnfavorable

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeasesFutureMinimumPaymentsDue

us-gaap:OtherFiniteLivedIntangibleAssetsGross

us-gaap:OtherLiabilities
dei:LegalEntity
us-gaap:PartnersCapital
dei:LegalEntity, us-gaap:PartnerCapitalComponents
dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PrepaidExpenseAndOtherAssets

us-gaap:PrepaidExpenseCurrentAndNoncurrent

us-gaap:RealEstateAccumulatedDepreciation
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfLand
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfLand

us-gaap:RealEstateGrossAtCarryingValue

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation
dei:LegalEntity
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:RealEstateInvestmentPropertyAtCost
dei:LegalEntity
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:RealEstateInvestmentPropertyNet
dei:LegalEntity
us-gaap:InvestmentType
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments

us-gaap:RentalProperties
dei:LegalEntity

us-gaap:RestrictedCashAndCashEquivalents
dei:LegalEntity

us-gaap:SecuredDebt
dei:LegalEntity

us-gaap:SecurityDepositLiability
dei:LegalEntity
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:InvestmentType
us-gaap:TenantImprovements
us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:UnsecuredDebt
dei:LegalEntity
dei:LegalEntity, us-gaap:LongtermDebtType

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Other Nonoperating Income Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Operating Lease Right Of Use Asset
Liabilities
Other Liabilities
Noncurrent Liabilities
Minority Interest
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Increase Decrease In Accounts Receivable
Shares
Weighted Average Number Of Shares Outstanding Basic
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CommonStockValue █████████▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁0.6050.6050.6050.6030.6010.6010.6010.5990.5970.4750.4740.4730.4730.4730.4730.4710.4710.4640.4570.4560.4540.4540.4540.4540.4490.4380.4370.4360.4260.4190.4050.4050.4050.3970.3970.3930.3930.3930.393NANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁76.16732476.165872NA76.11803276.11468776.11362NA75.83243566.88978464.182073NA64.1373664.1325246.93582NA64.09306664.08908164.06261NA63.27270263.13480863.133389NA62.89779761.99214761.321447NA60.44427659.72163658.492473NA57.77766757.42983757.056448NA57.05442557.05524457.053259NA57.05117357.05117330.924067NANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁59.98578759.984335NA59.82517459.72413959.723072NA59.44188750.13597847.004465NA46.95975246.93944946.93582NA46.89808646.87137746.173788NA45.37771945.23529245.233873NA44.99828144.09263143.419762NA42.53901941.81637940.582792NA39.81675339.46008639.033013NA38.67361738.65915538.65717NA38.65508438.65508430.924067NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount dei:LegalEntity,us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities aat:AmericanAssetsTrustL.P.,aat:OperatingPartnershipUnits▁█0.4860350.489775NA0.3464340.3452410.345153NA0.3296520.3308470.333275NA0.2626050.266260.0NA0.2319770.2320470.232099NA0.1699630.1717430.173594NA0.1685290.1767670.246672NA0.432311NANANANANANANANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities aat:OperatingPartnershipUnitsNA0.489775NA0.3464340.3452410.345153NA0.3296520.3308470.333275NA0.2626050.2662617.458586NA0.2319770.2320470.232099NA0.1699630.1717430.173594NA0.1685290.1767670.246672NA0.4323110.4310590.406856NANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▃▁▂▂▂▃▃▃▃▃▂▃▂▁▃▃▂▃▃▃▃▃▃▄▃▃▃▃▂▂▂▂▂▂█▂▂▂▁▂▁▁0.150.020.0500000000000000440.080.130.20.209999999999999960.220.180.240.139999999999999960.220.07-0.010.150000000000000020.190.120.160.199999999999999960.190.170.170.180000000000000050.30.20.180.170000000000000040.150.090.110.109999999999999990.110.080.080.730.080.040.050.0099999999999999950.080.01-0.02NANANA
 us-gaap:EarningsPerShareBasic dei:LegalEntity aat:AmericanAssetsTrustL.P.▅▂▂▃▄▆▆▆▅▇▄▆▃▁▅▆▄▅▆▆▅▅▅█▆▅▅▅▃▄0.150.020.0500000000000000440.080.130.20.209999999999999960.220.180.240.139999999999999960.220.07-0.010.150000000000000020.190.120.160.199999999999999960.190.170.170.170000000000000040.30.20.180.170000000000000040.150.090.11NANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareDiluted ▃▁▂▂▂▃▃▃▃▃▂▃▂▁▃▃▂▃▃▃▃▃▃▄▃▃▃▃▂▂▂▂▂▂█▂▂▂▁▂▁▁0.150.020.0500000000000000440.080.130.20.209999999999999960.220.180.240.139999999999999960.220.07-0.010.150000000000000020.190.120.160.199999999999999960.190.170.170.170000000000000040.30.20.180.160000000000000030.150.090.110.109999999999999990.110.080.080.730.080.040.050.0099999999999999950.080.01-0.02NANANA
 us-gaap:EarningsPerShareDiluted dei:LegalEntity aat:AmericanAssetsTrustL.P.▅▂▂▃▄▆▆▆▅▇▄▆▃▁▅▆▄▅▆▆▅▅▅█▆▅▅▅▃▄0.150.020.0500000000000000440.080.130.20.209999999999999960.220.180.240.139999999999999960.220.07-0.010.150000000000000020.190.120.160.199999999999999960.190.170.170.170000000000000040.30.20.180.160000000000000030.150.090.11NANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasicAndDiluted NANA0.050.080.130.20.220.220.180.240.140.220.07-0.010.150.190.120.160.190.190.170.170.180.30.20.180.160.150.090.110.110.110.080.080.730.080.040.050.010.080.01-0.02NANANA
 us-gaap:EarningsPerShareBasicAndDiluted dei:LegalEntity aat:AmericanAssetsTrustL.P.NANA0.050.080.130.20.220.220.180.240.140.220.07-0.010.150.190.120.160.190.190.170.170.180.30.20.180.160.150.090.110.110.110.080.08NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 Cost Ratio dei:LegalEntity aat:AmericanAssetsTrustL.P.91.809NANANA82.109NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Net profit Margin dei:LegalEntity aat:AmericanAssetsTrustL.P.▇▅▅▅▅███▅▅▅▅▅▅▅▅▄▃▄▄▃▃▃▃▂▂▂▂▁▁▁▂▁▁91.80983.98681.34784.37482.10996.74398.94798.36284.11385.31982.60582.50785.02380.73281.74682.33977.10673.79276.56275.97671.81970.73171.5371.28966.76966.03566.47867.34362.19963.9864.64565.31862.91462.18NANANANANANANANANANANA
 Operating Margin dei:LegalEntity aat:AmericanAssetsTrustL.P.▇▅▅▅▅███▅▅▅▅▅▅▅▅▄▃▄▄▃▃▃▃▂▂▂▂▁▁▁▂▁▁91.80983.98681.34784.37482.10996.74398.94798.36284.11385.31982.60582.50785.02380.73281.74682.33977.10673.79276.56275.97671.81970.73171.5371.28966.76966.03566.47867.34362.19963.9864.64565.31862.91462.18NANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments aat:MixedUseSegment▅▂▁▂▁▆▇█▇▇▇█▇▇▇█11.5195.1964.1876.3684.27413.58316.01717.04915.14515.17715.52816.48314.93415.38115.16916.729NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments aat:MultifamilySegment▆▄▄▅▄▇▅▆██▆▇▅▃▁▃12.73912.55212.47512.56412.46312.82512.61512.65512.89712.89912.73312.84812.62212.42412.20912.41NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments aat:OfficeSegment███████▇▂▁▁▁▃▁▁▁44.5744.46444.34444.82143.8844.50943.86742.8130.227.80627.28927.25131.05226.7726.69226.653NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 Operating Margin us-gaap:StatementBusinessSegments aat:RetailSegment▃▂▁▁▂▅▆▅▅█▆▅▆▅▇▆22.98121.77420.34120.62121.49225.82626.44825.84825.87129.43727.05525.92526.41526.15727.67626.547NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:ComprehensiveIncomeNetOfTax ▃▁▂▂▃▃▄▄▂▃▂▃▂▁▃▃▂▃█▃▁▂▃▄▃▃▂▃▂▂▂▂▂▂9.2341.6053.745.8047.4757.09513.46712.2415.9119.3933.47410.6463.6981.3488.2389.015.046.68329.30310.2140.5044.8099.03412.9069.0277.366.6078.2293.2354.1514.8214.3553.213.37NANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest ▃▂▂▃▃▃▄▄▃▄▃▄▃▂▃▄▃▃█▄▂▃▄▅▄▄▃▄▃▁▃▃▃▁2.4530.4070.9661.5552.0331.9413.7193.3641.823.3981.2323.8721.2710.5022.9863.2631.72.48411.5384.0180.1821.8863.295.1553.6563.0182.6873.31.305-1.7612.0861.9031.354-1.495NANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest ▅▁▂▄▄▄█▇▄▆▂▇▂▁11.6872.0124.7067.3599.5089.03617.18615.6057.73112.7914.70614.5184.9691.85NA12.2736.749.167NA14.2320.6866.695NA18.06112.68310.378NA11.5294.545.912NA6.2584.5644.865NANANANANANANANANANANA
us-gaap:CostsAndExpenses 65.386NANANA59.114NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GainsLossesOnExtinguishmentOfDebt █▁0.0-4.271NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA0.00.0NANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity aat:AmericanAssetsTrustL.P.█▁0.0-4.271NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity,us-gaap:DebtInstrument,us-gaap:LongtermDebtType aat:AmericanAssetsTrustL.P.,aat:SeniorGuaranteedNotesSeriesA,us-gaap:UnsecuredDebtNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity,us-gaap:DebtInstrument,us-gaap:LongtermDebtType,us-gaap:SubsequentEventType aat:AmericanAssetsTrustL.P.,aat:SeniorGuaranteedNotesSeriesA,us-gaap:UnsecuredDebt,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ███▇██▇▇▇▇█▆▆▆▇▅▆▆▅▅▅▅▄▇▅▆▅▅▅▅▅▄▅▄▄▄▄▄▃▄▄▃▄▁▁6.9246.8236.6446.4386.6796.826.3766.4795.9436.0736.6455.1765.3965.5676.2114.9585.1315.0824.4414.5134.3944.5493.9136.3574.7885.0164.6034.6824.6354.6124.5374.0314.4264.2013.8773.9593.9923.7653.133.7333.8253.1863.8581.5151.821
us-gaap:GrossProfit ▇▅▄▅▆███▅▆▄▅▆▅▄▅▄▃▄▄▃▃▃▃▂▂▂▃▂▂▂▂▂▂▂▁60.99354.38650.48253.67556.16763.1362.84163.43153.01255.47749.79652.33755.51351.76649.92152.62749.36146.39747.71147.98945.81245.64545.04445.62843.57843.36742.79544.0740.55641.30741.10542.1240.75241.09440.88738.193NANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperations █▁8.9411.257NA5.0387.65612.068NA12.8628.91611.095NA10.3943.072-0.453NA9.0945.5197.387NA8.4747.5997.651NA13.5628.7088.0277.0246.4173.7134.6024.6824.2233.0773.2382.6742.9621.6891.7490.0160.121-0.093NANANANA
us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest ▆▃▃▄▅▇▇▇▆▇▅▆▃▂▅▆▄▅▆▆▅▅▆█▆▆▅▅▄▄▄▄▃▄▄▃▃▃▂▂▂▆▁▂11.4871.7333.7886.499.82615.48416.48516.51911.94115.2439.20914.2714.413-0.6919.73112.5057.58810.30812.40811.85810.6510.72111.22619.02612.28411.37910.0469.095.3516.6586.9076.2584.5644.8654.8224.4982.6242.8710.560.31-0.00713.265-3.095-1.237NA
us-gaap:IncomeTaxExpenseBenefit ▅▄▂▃▂▅▄▅▅▅▃▅▄▂▅▅▃▂▃█▃▄▂▆▃▄▃█▁▄▁▇▄▅█▃▅▅▄▅▄0.20.1-0.1090.0-0.10.20.1190.30.20.20.0270.20.171-0.10.2460.21-0.079-0.2-0.0340.6-0.0450.087-0.180.3560.0350.084-0.0340.665-0.2830.112-0.2160.4730.0910.2970.628-0.0050.2150.2180.1410.3090.129NANANANA
us-gaap:IncomeTaxesPaid ▃▂▃▃▇▂▅▁▆▃▂▁▅▁▃▁▄▂▃▁▆▂▄▁▅▂▂▁▅▁▁▄█▁▁▄0.1510.0710.160.130.5030.0510.370.00.4440.1570.1250.00.3060.0310.1650.00.250.0460.1820.00.3840.0750.2510.00.3320.050.0850.00.3190.00.0330.2830.5850.00.0290.256NANA0.1170.0NANANANANA
us-gaap:InterestExpense █▇▅▅▅▆▆▆▅▆▅▅▄▆▇▆▄▅▅▅▅▅▅▂▂▃▄▅▆▆▆███▆█▇▇██▇▅▄▄▁14.86214.00513.33513.30213.33113.47213.79613.73413.12913.34912.86112.87912.68813.8213.99213.87312.65213.33112.78813.04913.15312.94613.0111.25811.19711.79512.56913.32513.43913.63213.77614.76414.74414.73613.80614.6914.47614.35614.69614.73814.06312.99112.39612.41610.624
us-gaap:InterestPaidNet ▁▆▄█▄█▅▅▆▆▆▅▅▇▆▄▄▃▄▄▅▄▅▂▂▃▃▅▅▅▆▇▇▆█▆▆▆9.02413.06911.9214.62911.87515.04312.612.80113.27313.30112.95812.74812.86714.05913.75311.73611.27610.70811.72311.99412.1711.90612.12910.08210.02110.45910.47512.31312.5212.72413.15614.16813.89313.12814.82213.41413.73413.379NANANANANANANA
us-gaap:NetIncomeLoss NA1.2572.8985.0387.65612.06812.84512.8628.91611.0956.67310.3943.072-0.4537.0779.0945.5197.3878.8618.4747.5997.6518.21213.5628.7088.0277.0246.4173.7134.6024.6824.2233.0773.23828.5772.8171.6891.8560.3443.0520.219-0.698NANANA
 us-gaap:NetIncomeLoss dei:LegalEntity aat:AmericanAssetsTrustL.P.NA1.5963.6656.4039.75715.3816.38116.42711.84915.159.11314.24.197-0.6199.67112.4457.52710.24812.34711.81610.60710.67811.17318.99412.24411.3360.9168.9955.2576.588NANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▆▂▃▄▅▇██▆▇▅▆▃▁▅▆▄▅▆▅▅▅▅█▆▅▅▄▃▄▄▃▃▃▃▃▂▂▁▁▁8.9411.2572.8985.0387.65612.06812.84512.8628.91611.0956.67310.3943.072-0.4537.0779.0945.5197.3878.8618.4747.5997.6518.21213.5628.7088.0277.0246.4173.7134.6024.6824.2233.0773.2382.6742.9621.6891.7490.0160.1210.219NANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▃▁▂▂▃▄▄▄▃▄▃▃▂▁▃▃▂▃▃▃▃▃▃▄▃▃▃▃▂▂▂▂▂▂█▂▁▂▁▂▁11.3521.5963.6656.4039.75715.3816.38116.42711.84915.159.11314.24.197-0.4539.67112.4457.52710.24812.34711.81610.60710.67811.17318.99412.24411.3369.9318.9955.2576.5886.7686.1264.4314.73341.6884.1522.4932.7390.5234.4860.323NANANANA
us-gaap:OperatingExpenses NA63.92464.93264.05159.11467.89568.95467.97859.62656.49860.51455.23267.77467.81257.95455.86257.05850.46351.45250.49248.11547.08847.63747.77943.26542.79143.95244.30744.47343.59944.23843.87743.54142.339.5843.71640.55939.70540.82541.13738.29131.5123.57223.53317.192
 us-gaap:OperatingExpenses dei:LegalEntity aat:AmericanAssetsTrustL.P.NA63.92464.93264.05159.11467.89568.95467.97859.62656.49860.51455.23267.77467.81257.95455.86257.05850.46351.45250.49248.11547.08847.63747.77943.26542.79143.95244.30744.47343.599NANANANANANANANANANANANANANANA
us-gaap:OperatingIncomeLoss ▇▄▃▅▅▇██▆▇▅▇▃▂▆▇▄▆▆▆▆▆▆▆▆▆▅▅▄▅▅▅▄▄▅▄▃▄▂▃▂▃▁▁▂26.42320.06216.41520.32322.99528.84829.99330.38424.48728.82122.09127.27517.24912.9223.79226.47720.04823.32925.1125.48423.70423.64323.89323.5123.50423.24422.52623.03617.71220.35420.40721.44119.37319.8820.24719.1217.2517.33314.18215.15613.98815.3739.9811.4312.095
us-gaap:OtherNonoperatingIncomeExpense ▃▃▇▂▄▄▅▃▄▃▄▃▃▅▃▃▄▅▄▁▄▄▅▂▄▃▄▁█▃▅▂▃▃▂▄▃▃▆▃▆▁▁▃▄-0.074-0.0530.708-0.5310.1620.1080.288-0.131-0.05-0.229-0.021-0.125-0.1480.209-0.069-0.0990.1920.310.086-0.5770.0990.0240.343-0.347-0.023-0.070.089-0.6211.078-0.0640.276-0.419-0.065-0.279-0.4410.068-0.15-0.1060.649-0.1080.53-0.602-0.679-0.2510.071
 us-gaap:OtherNonoperatingIncomeExpense dei:LegalEntity aat:AmericanAssetsTrustL.P.▃▃▇▁▄▄▅▃▃▃▃▃▃▄▃▃▄▅▄▁▄▄▅▂▃▃▄▁█▃-0.074-0.0530.708-0.5310.1620.1080.288-0.131-0.05-0.229-0.021-0.125-0.1480.209-0.069-0.0990.1920.310.086-0.5770.0990.0240.343-0.347-0.023-0.070.089-0.6211.064-0.091NANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▃▂▂▂▃▄▄▄▃▄▃▄▂▁▃▃▃▃▃▃▃▃▃▄▃▃▃▃▂▃▃▂▂▂█▂▂▂▂▂▂▄▁▁▂11.4871.7333.7886.499.82615.48416.48516.51911.94115.2439.20914.2714.413-0.6919.73112.5057.58810.30812.40811.85810.6510.72111.22619.02612.28411.37910.0469.095.3516.6586.9076.2584.5644.86541.8214.2852.6242.8710.6554.6180.45513.596-2.996-1.1935.839
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▁▁▇▁▁▁█▂▂▂▇▂▂▂▇▂▆▆▆▆▆▆▆▆▆▆▆▆▅▅▆▆▅▅▅▅▅▅▅▅▅▄▃▃▃6.1913.27181.3474.681.1438.12598.94711.2579.4669.64282.60510.969.539.78381.74611.00677.10673.79276.56275.97671.81970.73171.5371.28966.76966.03566.47867.34362.18563.95364.64565.31862.91462.1863.1262.83657.80957.03853.83856.29352.27946.88333.55234.96329.287
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments aat:MixedUseSegment▅▂▁▂▁▆▇█▇▇▇█▇▇▇█11.5195.1964.1876.3684.27413.58316.01717.04915.14515.17715.52816.48314.93415.38115.16916.729NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments aat:MultifamilySegment▆▄▄▅▄▇▅▆██▆▇▅▃▁▃12.73912.55212.47512.56412.46312.82512.61512.65512.89712.89912.73312.84812.62212.42412.20912.41NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments aat:OfficeSegment███████▇▂▁▁▁▃▁▁▁44.5744.46444.34444.82143.8844.50943.86742.8130.227.80627.28927.25131.05226.7726.69226.653NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments aat:RetailSegment▃▂▁▁▂▅▆▅▅█▆▅▆▅▇▆22.98121.77420.34120.62121.49225.82626.44825.84825.87129.43727.05525.92526.41526.15727.67626.547NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues ▇▆▆▇▆███▇▇▆▆▇▆▆▆▆▅▆▆▅▅▅▅▅▅▅▅▄▄▅▅▄▄▄▄▄▄▃▄▃▃▁▂▁91.80983.98681.34784.37482.10996.74398.94798.36284.11385.31982.60582.50785.02380.73281.74682.33977.10673.79276.56275.97671.81970.73171.5371.28966.76966.03566.47867.34362.18563.95364.64565.31862.91462.1863.1262.83657.80957.03853.83856.29352.27946.88333.55234.96329.287
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets ██▇▇▇▆▇▇▆▄▄▄▃▄▄▄▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁3045.5313049.3462817.3092844.1142846.2822756.1852790.3332788.9582718.7582217.0482198.252196.7762186.042213.5662259.8642275.6182171.1762115.3411986.9331989.2281971.9131977.8261978.4191996.0751974.3131966.1491941.7621938.661892.4231878.9581832.4431840.8461836.7591824.471827.5871860.9371713.4481722.4711709.2811724.7611722.765NA1117.357NANA
us-gaap:Liabilities ██▆▆▆▅▅▅▅▄▄▄▄▄▄▅▄▃▂▂▂▂▂▂▂▃▂▂▂▂▂▂▂▂▂▃▁▁▁▁▁1818.3851813.9071563.9031578.1321569.7941475.1641496.6611490.7341426.8361411.7151395.7791381.2851368.4051384.2331415.721427.0671318.8131253.6321148.3821174.7161166.0151157.4251149.4921163.5621164.0311198.5951175.1861167.6891154.731156.4821145.8651149.6021140.2351145.3141141.8581205.641051.0451051.2861029.5531034.2881025.51NA962.236NANA
us-gaap:LiabilitiesAndStockholdersEquity ██▇▇▇▆▇▇▆▄▄▄▃▄▄▄▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁3045.5313049.3462817.3092844.1142846.2822756.1852790.3332788.9582718.7582217.0482198.252196.7762186.042213.5662259.8642275.6182171.1762115.3411986.9331989.2281971.9131977.8261978.4191996.0751974.3131966.1491941.7621938.661892.4231878.9581832.4431840.8461836.7591824.471827.5871860.9371713.4481722.4711709.2811724.7611722.765NA1117.357NANA
us-gaap:StockholdersEquity ▇▇███████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁1251.3831257.5991271.4421280.9391300.9531304.2421313.9171317.271309.744807.251802.977812.419813.797823.04833.71836.46839.065834.881809.556792.404783.415793.625799.562801.963780.725737.492735.303738.223704.305686.454648.511651.787655.044634.078638.361610.814614.781620.468626.031NANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CashAndCashEquivalentsAtCarryingValue ██▃▃▃▁▂▃▁▁▁▁▁▁▂▂▁▄▁▂▁▁▁▁▁▁▂▂▂▂▁▂▂▁▁▁▂▂▃▃▂▂▁▁▁368.266380.434137.333155.327146.13152.37199.303115.56844.77854.53847.95656.2251.32655.33682.6194.20731.38190.1144.80161.95943.88644.00739.92540.15834.94954.63959.35795.14578.85979.48648.98765.72263.3443.97242.47934.91798.584100.652112.723123.22292.535100.39641.95337.36331.592
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ██▃▃▃▁▂▃▁▁▁▂▁▂▂▂▁▄▁369.982382.15139.049156.558150.08856.828109.451126.06254.4864.31557.27266.13860.71165.22591.954104.33140.591199.94654.751NANANA51.548NANANA70.351NANANANANANANANANANANANANANANANANANA
 us-gaap:Land us-gaap:InvestmentType us-gaap:RealEstateInvestmentNANA628.557NANANA628.557NANANA555.63NANANA555.738NANANA490.459NANANA490.494NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Land us-gaap:InvestmentType,us-gaap:StatementBusinessSegments us-gaap:RealEstateInvestment,aat:OfficeSegmentNANA225.238NANANA225.238NANANA143.467NANANA143.575NANANA143.575NANANA143.575NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Land us-gaap:InvestmentType,us-gaap:StatementBusinessSegments us-gaap:RealEstateInvestment,aat:RetailSegmentNANA254.016NANANA254.016NANANA262.86NANANA262.86NANANA245.553NANANA245.588NANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 us-gaap:FurnitureAndFixturesGross us-gaap:InvestmentType us-gaap:RealEstateInvestmentNANA36.436NANANA26.158NANANA23.911NANANA21.263NANANA16.656NANANA15.065NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FurnitureAndFixturesGross us-gaap:InvestmentType,us-gaap:StatementBusinessSegments us-gaap:RealEstateInvestment,aat:MixedUseSegmentNANA15.651NANANA7.187NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FurnitureAndFixturesGross us-gaap:InvestmentType,us-gaap:StatementBusinessSegments us-gaap:RealEstateInvestment,aat:MultifamilySegmentNANA16.48NANANA14.995NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FurnitureAndFixturesGross us-gaap:InvestmentType,us-gaap:StatementBusinessSegments us-gaap:RealEstateInvestment,aat:OfficeSegmentNANA3.236NANANA3.065NANANA2.671NANANA2.085NANANA1.764NANANA1.265NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FurnitureAndFixturesGross us-gaap:InvestmentType,us-gaap:StatementBusinessSegments us-gaap:RealEstateInvestment,aat:RetailSegmentNANA1.069NANANA0.911NANANA0.57NANANA0.372NANANA0.702NANANA0.491NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ConstructionInProgressGross ▄▃▃▃▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▃▃▇█▇▆▅▄▃▃▃▂▂▂▂▂▁▁▁▁115.54693.00191.04781.48594.23290.59891.26473.3483.46177.09471.22860.37576.50274.44768.27266.21861.41554.34650.49852.13952.04486.18973.121229.212259.879232.597195.736153.958116.49889.99167.38962.47849.37834.49832.18334.36927.6124.7863.4954.2851.144NA0.925NANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:AboveMarketLeasesNANA0.121NANANA0.183NANANA0.518NANANA1.178NANANA2.088NANANA3.337NANANA5.103NANANA7.399NANANA11.483NANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:LeaseAgreements▄▄▅▅▅▅▅▆▆▁▁▁▁▁▂▂▂▂▂▂▂▃▃▃▄▄▄▄▅▅▆▆▇▇█24.17625.23726.32827.47228.67829.94231.40733.05134.9066.2026.7997.448.0238.6999.54910.4611.12510.81411.92313.26514.5215.82617.20118.75820.36822.02923.73425.46627.30529.54431.93334.85838.06641.96145.791NANANA45.398NANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:LeasesAcquiredInPlaceNANA26.207NANANA31.224NANANA6.281NANANA8.371NANANA9.835NANANA13.864NANANA18.631NANANA24.534NANANA34.308NANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▇███▇▇▂▂▂▃▁27.39228.58329.3530.11125.67326.3384.8635.5746.2786.9730.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:LongTermDebt NANA1311.0NANANA1362.003NANANA1232.765NANANA1329.889NANANA1047.028NANANA1034.002NANANA1069.983953.19952.847952.498952.1741044.1171044.2991044.4671044.682NANANA943.479NANANANANANA
 us-gaap:LongTermDebt dei:LegalEntity,us-gaap:LongtermDebtType aat:AmericanAssetsTrustL.P.,us-gaap:SecuredDebt▁▁▁▁▁▁▂▂▂▂▂▂▂▂▃▃▃▃▄▅▅▅▆▆▆▇█110.944110.934110.923110.913110.902110.892161.879162.159162.426162.688182.572204.818205.155205.486279.55279.867280.17315.743445.18467.866467.531494.883579.743579.449579.133711.809812.811NANANA952.174NANANANANANANANANANANANANANA
 us-gaap:LongTermDebt dei:LegalEntity,us-gaap:LongtermDebtType aat:AmericanAssetsTrustL.P.,us-gaap:UnsecuredDebt██▆▆▆▆▆▆▅▅▅▅▅▅▅▅▄▄▂▂▂▂▁1537.3071536.891196.6771196.5471196.2911196.0361195.781195.5251045.9491045.7091045.8631045.6351045.4061045.1781045.471044.934944.816844.752596.35596.008595.775545.883446.613NANANANANANANANANANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▁▁▂▂▁▁▁▁▂▃▃▃▃▄▄▄▄▅▅▅▅▅▅▆▅▆▆▆▆▆▆▆▆▇▇▇▇▇▇██-24.237-22.16-18.036-14.957-24.465-23.221-20.245-19.046-17.822-1.918-0.5063.0723.8386.29310.43412.09113.29826.82828.99522.10822.48326.77629.36530.5529.55730.06231.27332.74833.38836.02238.06739.45741.4845.07847.36844.48347.62250.71753.69757.38159.81NA33.247NANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ██▁▁3.3283.3283.2323.232NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ██▁▁3.4283.4283.3283.328NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ██▁▁3.5313.5313.4283.428NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA3.531NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA19.71NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity ▇▇███████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁1251.3831257.5991271.4421280.9391300.9531304.2421313.9171317.271309.744807.251802.977812.419813.797823.04833.71836.46839.065834.881809.556792.404783.415793.625799.562801.963780.725737.492735.303738.223704.305686.454648.511651.787655.044634.078638.361610.814614.781620.468626.031NANANANANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▇▇███████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁1227.1461235.4391253.4061265.9821276.4881281.0211293.6721298.2241291.922805.333802.471815.491817.635829.333844.144848.551852.363861.709838.551814.512805.898820.401828.927832.513810.282767.554766.576770.971737.693722.476686.578691.244696.524679.156685.729655.297662.403671.185679.728690.473697.255NA155.121NANA
us-gaap:CommonStockValue █████████▄▄▄▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁0.6050.6050.6050.6030.6010.6010.6010.5990.5970.4750.4740.4730.4730.4730.4730.4710.4710.4640.4570.4560.4540.4540.4540.4540.4490.4380.4370.4360.4260.4190.4050.4050.4050.3970.3970.3930.3930.3930.393NANANANANANA
us-gaap:AdditionalPaidInCapitalCommonStock █████████▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁▁▁▁▁▁1448.6121447.1281445.6441443.7641454.5161453.2641452.0141450.8161438.768928.792920.661920.324919.598919.793919.066917.334916.695905.304874.597874.859864.675864.038863.432863.515844.639800.081795.065794.432759.158735.175692.196691.389690.507664.265663.589656.425655.087654.344653.645NANANANANANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▁▂▂▃▃▃▃▄▄▄▄▄▅▅▅▅▆▆▆▆▆▆▇▆▇▇▇▇▇▇▇███▇▇██-199.956-192.098-176.56-164.462-154.516-150.226-144.378-139.307-135.497-130.841-128.778-122.293-120.008-110.55-97.28-91.695-88.595-81.921-77.296-74.328-71.433-67.724-64.066-60.976-64.024-62.409-60.291-57.269-54.186-48.619-44.09-40.007-35.868-30.584-25.625-46.004-40.699-34.269-28.007NANANANANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▅▄▄▄▄▆▅▆▇▇███▇▇▇▇▇▁▁▃▄▄▄▄▄▄▄▄▄2.1221.9641.7531.0340.3520.6035.685.1625.8768.82510.6213.91513.73413.32411.45110.3510.49411.03411.798-8.583-10.281-3.143-0.258-1.03-0.339-0.6180.0920.624-1.093-0.5210.0NANANANANANANANANANANANANANA
us-gaap:MinorityInterest ▁▁▂▂▁▁▁▁▂▃▃▃▃▄▄▄▄▅▅▅▅▅▅▆▅▆▆▆▆▆▆▆▆▇▇▇▇▇▇██-24.237-22.16-18.036-14.957-24.465-23.221-20.245-19.046-17.822-1.918-0.5063.0723.8386.29310.43412.09113.29826.82828.99522.10822.48326.77629.36530.5529.55730.06231.27332.74833.38836.02238.06739.45741.4845.07847.36844.48347.62250.71753.69757.38159.81NA33.247NANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▄▄1.4841.484NA1.2511.2521.25NA1.131.1311.0980.8590.7260.7270.7272.8180.6390.6390.6390.5590.60.6370.6180.740.4130.8340.891.0951.0451.0070.5190.7260.7260.7170.6760.7240.7220.7070.6990.713NANANANANANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents us-gaap:NoncontrollingInterest▄▄4.5314.531NA4.0453.2784.917NA4.5894.5894.81NA4.6384.6424.643NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▆▂▆▃▇▅█▅▅▂▅▆▇▃▆▅▇▃▆▄▅▃▅▃▅▃▄▃▄▂▄▃▄▃▃▂▂▁▃▁▂▁▁34.22142.50517.83640.02723.76145.36131.70451.94333.33836.83117.59436.59638.34543.97220.08441.88936.04447.83619.93639.17829.28934.2620.68132.3725.16332.5124.21431.06322.34127.99318.24428.81720.00125.67220.55120.05216.84218.513.54123.11613.43715.2710.75212.586NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▇▇▇▇▇▁▇▇▇▇▇▇▇▄▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▅▇▇▇█▆▅▇▇-24.875-12.216-15.503-14.441-15.208-23.925-25.153-23.98-527.613-22.437-27.554-13.383-12.045-11.365-12.236-61.72-243.336-13.272-16.323-14.284-15.012-17.895-8.169-25.185-48.746-45.169-53.886-35.096-32.259-31.599-23.079-13.06-12.393-9.72260.66-211.4-5.643-37.912-10.78320.786-92.143-149.549-14.117-2.366NA
 us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity aat:AmericanAssetsTrustL.P.████████▁██████▇▅███████▇█▇███-24.875-12.216-15.503-14.441-15.208-23.925-25.153-23.98-527.613-22.437-27.554-13.383-12.045-11.365-12.236-61.72-243.336-13.272-16.323-14.284-15.012-17.895-8.169-25.185-48.746-45.169-53.886-35.096-32.259-31.599NANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▅▂▂▃▁▂▂█▂▂▂▂▁▂▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▄▂▂▂▂▃▄▂▂-21.514212.812-19.842-19.11684.707-74.059-23.16243.619484.44-7.3511.094-17.786-30.814-59.336-20.05182.65848.562110.745-20.771-6.821-14.398-12.283-12.745-1.9763.8937.941-6.11620.3199.29134.105-11.9-13.37511.76-14.457-73.649127.681-13.2677.341-13.257-13.21570.845192.7227.955-4.449NA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity aat:AmericanAssetsTrustL.P.▂▅▂▂▃▁▂▂█▂▂▂▂▁▂▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂-21.514212.812-19.842-19.11684.707-74.059-23.16243.619484.44-7.3511.094-17.786-30.814-59.336-20.05182.65848.562110.745-20.771-6.821-14.398-12.283-12.745-1.9763.8937.941-6.11620.3199.29134.105NANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄█▃▄▅▃▃▅▄▄▄▄▄▃▄▅▁▆-12.168243.101-17.5096.4793.26-52.623-16.61171.582-9.8357.043-8.8665.427-4.514-26.729-12.37763.74-159.355145.195NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect dei:LegalEntity aat:AmericanAssetsTrustL.P.▄█▃▄▅▃▃▅▄▄▄▄▄▃▄▅▁▆-12.168243.101-17.5096.4793.26-52.623-16.61171.582-9.8357.043-8.8665.427-4.514-26.729-12.37763.74-159.355145.195NANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:DepreciationDepletionAndAmortization ▆▆▆▆▅▆▅▆▄▃▃▃██▃▄▅▂▂▂▂▂▂▂▁▁▁▂▂▂▂▂▂▂▂▂▁▁27.64627.50127.42326.91426.49327.46226.47226.56822.58220.58321.0619.88632.86833.27919.91821.19224.18217.98618.1617.99217.71417.45317.23815.76115.28615.10715.66616.35218.20916.34116.16116.64816.95317.01316.57616.09414.32914.854NANANANANANANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▂▄▂▆█▁▄▃▄▃▄▄▂▃▄▅▃▂▄▄▃▃▃▅▃▃▃▅▂▃▃▃▃▄▄▄▃▂▃▄▃▄▃▄-1.9111.841-2.5623.687.454-3.6321.803-0.9090.643-0.4661.3371.219-1.643-0.5771.3272.463-0.948-1.7260.7831.792-0.216-0.012-0.5862.516-0.045-0.874-0.4742.574-1.357-1.022-0.974-0.054-0.1251.1980.3821.278-0.23-1.4930.3041.7520.1011.409-0.2421.099NA
 us-gaap:IncreaseDecreaseInAccountsReceivable dei:LegalEntity aat:AmericanAssetsTrustL.P.▂▄▂▆█▁▄▃▄▃▄▄▂▃▄▅▃▂▄▄▃▃▃▅▃▃▃▅▂▃-1.9111.841-2.5623.687.454-3.6321.803-0.9090.643-0.4661.3371.219-1.643-0.5771.3272.463-0.948-1.7260.7831.792-0.216-0.012-0.5862.516-0.045-0.874-0.4742.574-1.357-1.022NANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▆▂▆▃▇▅█▅▅▂▅▆▇▃▆▅▇▃▆▄▅▃▅▃▅▃▄▃▄▂▄▃▄▃▃▂▂▁▃▁▂▁▁34.22142.50517.83640.02723.76145.36131.70451.94333.33836.83117.59436.59638.34543.97220.08441.88936.04447.83619.93639.17829.28934.2620.68132.3725.16332.5124.21431.06322.34127.99318.24428.81720.00125.67220.55120.05216.84218.513.54123.11613.43715.2710.75212.586NA
us-gaap:NetIncomeLoss NA1.2572.8985.0387.65612.06812.84512.8628.91611.0956.67310.3943.072-0.4537.0779.0945.5197.3878.8618.4747.5997.6518.21213.5628.7088.0277.0246.4173.7134.6024.6824.2233.0773.23828.5772.8171.6891.8560.3443.0520.219-0.698NANANA
 us-gaap:NetIncomeLoss dei:LegalEntity aat:AmericanAssetsTrustL.P.NA1.5963.6656.4039.75715.3816.38116.42711.84915.159.11314.24.197-0.6199.67112.4457.52710.24812.34711.81610.60710.67811.17318.99412.24411.3360.9168.9955.2576.588NANANANANANANANANANANANANANANA
us-gaap:ProfitLoss ▃▂▂▂▃▄▄▄▃▄▃▄▂▁▃▃▃▃▃▃▃▃▃▄▃▃▃▃▂▃▃▂▂▂█▂▂▂▂▂▂▄▁▁▂11.4871.7333.7886.499.82615.48416.48516.51911.94115.2439.20914.2714.413-0.6919.73112.5057.58810.30812.40811.85810.6510.72111.22619.02612.28411.37910.0469.095.3516.6586.9076.2584.5644.86541.8214.2852.6242.8710.6554.6180.45513.596-2.996-1.1935.839
us-gaap:ShareBasedCompensation ▄▄▇▃▃▃▃▃▃▃▂▂▂▂█▂▂▂▁▂▂▂▂▁▂▂▃▃▃▁▂▂▂▂▂▂▂▂▂▂▂▁1.4841.4842.5541.2511.2521.251.1181.131.1311.0980.8590.7260.7270.7272.8180.6390.6390.6390.5590.60.6370.6180.740.4130.8340.891.0951.0451.0070.5190.7260.7260.7170.6760.7240.7220.7070.6990.7130.7120.6990.491NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇▇▇▇▇▇▁▇▇▇▇▇▇▇▄▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇█▅▇▇▇█▆▅▇▇-24.875-12.216-15.503-14.441-15.208-23.925-25.153-23.98-527.613-22.437-27.554-13.383-12.045-11.365-12.236-61.72-243.336-13.272-16.323-14.284-15.012-17.895-8.169-25.185-48.746-45.169-53.886-35.096-32.259-31.599-23.079-13.06-12.393-9.72260.66-211.4-5.643-37.912-10.78320.786-92.143-149.549-14.117-2.366NA
 us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity aat:AmericanAssetsTrustL.P.████████▁██████▇▅███████▇█▇███-24.875-12.216-15.503-14.441-15.208-23.925-25.153-23.98-527.613-22.437-27.554-13.383-12.045-11.365-12.236-61.72-243.336-13.272-16.323-14.284-15.012-17.895-8.169-25.185-48.746-45.169-53.886-35.096-32.259-31.599NANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireProductiveAssets dei:LegalEntity,us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty,us-gaap:SubsequentEventType aat:AmericanAssetsTrustL.P.,aat:EastgateOfficePark,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▂▅▂▂▃▁▂▂█▂▂▂▂▁▂▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▄▂▂▂▂▃▄▂▂-21.514212.812-19.842-19.11684.707-74.059-23.16243.619484.44-7.3511.094-17.786-30.814-59.336-20.05182.65848.562110.745-20.771-6.821-14.398-12.283-12.745-1.9763.8937.941-6.11620.3199.29134.105-11.9-13.37511.76-14.457-73.649127.681-13.2677.341-13.257-13.21570.845192.7227.955-4.449NA
 us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity aat:AmericanAssetsTrustL.P.▂▅▂▂▃▁▂▂█▂▂▂▂▁▂▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂-21.514212.812-19.842-19.11684.707-74.059-23.16243.619484.44-7.3511.094-17.786-30.814-59.336-20.05182.65848.562110.745-20.771-6.821-14.398-12.283-12.745-1.9763.8937.941-6.11620.3199.29134.105NANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividends ▇▇▆▆▄██▇▆▅▅▅▅▅▅▅▅▅▅▄▄▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▁21.46421.46319.16419.11615.29322.93722.93821.35318.25318.06118.06417.38817.38817.38817.36516.72416.72516.72316.54115.88315.82615.82715.82714.71114.52414.3514.32313.53513.31313.1412.85512.26512.26612.11412.11212.11412.11312.11312.11312.11212.1149.784NANANA
us-gaap:Dividends █▁21.46421.463NA19.11615.29322.937NA21.35318.25318.06118.06417.38817.38817.38817.36516.72416.72516.72316.54115.88315.82615.82715.82714.71114.52414.3514.32313.53513.31313.1412.85512.26512.26612.114NANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value605000.0605000.0605000.0603000.0601000.0601000.0601000.0599000.0597000.0475000.0474000.0473000.0473000.0473000.0473000.0471000.0471000.0464000.0457000.0456000.0454000.0454000.0454000.0454000.0449000.0438000.0437000.0436000.0426000.0419000.0405000.0405000.0405000.0397000.0397000.0393000.0393000.0393000.0393000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value7676767676756664646446646464636363626161605958575757575757575730
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value7676767676756664646464646464636363626161605958
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0136.6100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value5959595959595047464646464646454545444443424140393939383838383830
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value7676767676756664646464646464636363626161605958
Percentage of WeightedAverageNumberOfSharesOutstandingBasic127.0127.0127.2127.4127.4127.6133.4136.5136.6136.6136.6136.7136.7138.7139.4139.6139.6139.8140.6141.2142.1142.8144.1

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount dei:LegalEntity, us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

aat:AmericanAssetsTrustL.P., aat:OperatingPartnershipUnits


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value0.4860350.4897750.3464340.3452410.3451530.3296520.3308470.3332750.2626050.266260.00.2319770.2320470.2320990.1699630.1717430.1735940.1685290.1767670.2466720.432311
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

aat:OperatingPartnershipUnits


Antidilutive
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value0.4897750.3464340.3452410.3451530.3296520.3308470.3332750.2626050.26626170.2319770.2320470.2320990.1699630.1717430.1735940.1685290.1767670.2466720.4323110.4310590.406856
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.150.020.050.080.130.20.210.220.180.240.140.220.07-0.010.150.190.120.160.20.190.170.170.180.30.20.180.170.150.090.110.110.110.080.080.730.080.040.050.010.080.01-0.02
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareBasic dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.150.020.050.080.130.20.210.220.180.240.140.220.07-0.010.150.190.120.160.20.190.170.170.170.30.20.180.170.150.090.11
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.094.4100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.150.020.050.080.130.20.210.220.180.240.140.220.07-0.010.150.190.120.160.20.190.170.170.170.30.20.180.160.150.090.110.110.110.080.080.730.080.040.050.010.080.01-0.02
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareDiluted dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.150.020.050.080.130.20.210.220.180.240.140.220.07-0.010.150.190.120.160.20.190.170.170.170.30.20.180.160.150.090.11
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.050.080.130.20.220.220.180.240.140.220.07-0.010.150.190.120.160.190.190.170.170.180.30.20.180.160.150.090.110.110.110.080.080.730.080.040.050.010.080.01-0.02
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareBasicAndDiluted dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Earnings
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.050.080.130.20.220.220.180.240.140.220.07-0.010.150.190.120.160.190.190.170.170.180.30.20.180.160.150.090.110.110.110.080.08
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value9.2341.6053.745.8047.4757.09513125.9119.3933.474103.6981.3488.2389.015.046.68329100.5044.8099.034129.0277.366.6078.2293.2354.1514.8214.3553.213.37
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax149.249.14.6124.0654.087.313.6108.762.497.44.297.138.813.810.181.96.59.138.313.40.76.812.618.113.511.19.912.25.26.57.56.75.15.4

us-gaap:ComprehensiveIncomeNetOfTax dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

aat:AmericanAssetsTrustL.P., us-gaap:GeneralPartner


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value9.2341.6053.745.8047.4757.09513125.9119.3933.474103.6981.3488.2389.015.046.68329100.5044.8099.034129.0277.366.6078.2293.2354.151
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax149.249.14.6124.0654.087.313.6108.762.497.44.297.138.813.810.181.96.59.138.313.40.76.812.618.113.511.19.912.25.26.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P. us-gaap:GeneralPartner0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:AmericanAssetsTrustL.P., us-gaap:LimitedPartner


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-2.453-0.407-0.966-1.555-2.033-1.941-3.719-3.364-1.82-3.398-1.232-3.872-1.271-0.502-2.986-3.263-1.7-2.484-11.538-4.018-0.182-1.886-3.29-5.155-3.656-3.018-2.687-3.3-1.305-1.761
Percentage of ComprehensiveIncomeNetOfTax-26.6-25.4-25.8-26.8-27.2-27.4-27.6-27.5-30.8-36.2-35.5-36.4-34.4-37.2-36.2-36.2-33.7-37.2-39.4-39.3-36.1-39.2-36.4-39.9-40.5-41.0-40.7-40.1-40.3-42.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-39.6-12.4-1.2-33.2-177.9-23.9-3.8-29.9-19.2-35.2-1.5-35.3-13.3-5.1-3.7-29.6-2.2-3.4-15.1-5.3-0.3-2.7-4.6-7.2-5.5-4.6-4.0-4.9-2.1-2.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P. us-gaap:LimitedPartner0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.4530.4070.9661.5552.0331.9413.7193.3641.823.3981.2323.8721.2710.5022.9863.2631.72.484114.0180.1821.8863.295.1553.6563.0182.6873.31.305-1.7612.0861.9031.354-1.495
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax39.612.41.233.2177.923.93.829.919.235.21.535.313.35.13.729.62.23.415.15.30.32.74.67.25.54.64.04.92.1-2.83.22.92.2-2.4

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value112.0124.7067.3599.5089.03617157.731124.706144.9691.85126.749.167140.6866.695181210114.545.9126.2584.5644.865
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax188.861.55.8157.2831.8111.217.4138.681.7132.75.7132.552.118.9111.58.712.418.71.09.525.319.015.717.17.39.29.67.37.8

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-30
Value112.0124.7067.3599.5089.03617157.731124.706144.9691.85126.749.167140.6866.695181210114.54
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax188.861.55.8157.2831.8111.217.4138.681.7132.75.7132.552.118.9111.58.712.418.71.09.525.319.015.717.17.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302020-06-30
Value6559
Percentage of CostsAndExpenses100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1056.15171.8

us-gaap:CostsAndExpenses dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Costs
Period End2021-06-302020-06-30
Value6559
Percentage of CostsAndExpenses100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1056.15171.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302021-03-312011-12-312011-09-30
Value0-4271000.000
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-130.60.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Gains
Period End2021-06-302021-03-31
Value0-4271000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0-130.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.0

us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesA, us-gaap:UnsecuredDebt


Gains
Period End2021-01-26
Value3900000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P. aat:SeniorGuaranteedNotesSeriesA us-gaap:UnsecuredDebt0.0

us-gaap:GainsLossesOnExtinguishmentOfDebt dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesA, us-gaap:UnsecuredDebt, us-gaap:SubsequentEvent


Gains
Period End2021-01-26
Value3900000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P. aat:SeniorGuaranteedNotesSeriesA us-gaap:UnsecuredDebt us-gaap:SubsequentEvent0.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.9246.8236.6446.4386.6796.826.3766.4795.9436.0736.6455.1765.3965.5676.2114.9585.1315.0824.4414.5134.3944.5493.9136.3574.7885.0164.6034.6824.6354.6124.5374.0314.4264.2013.8773.9593.9923.7653.133.7333.8253.1863.8581.5151.821
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax111.8208.68.2137.6584.383.96.457.662.863.08.047.256.656.97.645.06.76.95.85.96.16.45.58.97.27.66.97.07.57.27.06.27.06.86.16.36.96.65.86.67.36.80.04.36.2

us-gaap:GeneralAndAdministrativeExpense dei:LegalEntity

aat:AmericanAssetsTrustL.P.


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value6.9246.8236.6446.4386.6796.826.3766.4795.9436.0736.6455.1765.3965.5676.2114.9585.1315.0824.4414.5134.3944.5493.9136.3574.7885.0164.6034.6824.6354.612
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax111.8208.68.2137.6584.383.96.457.662.863.08.047.256.656.97.645.06.76.95.85.96.16.45.58.97.27.66.97.07.57.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value605450535663626353554952555149524946474745454545434342444041414240414038
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax985.21662.762.11146.94914.0777.063.5563.5560.0575.460.3477.5582.5529.161.1478.264.062.962.363.263.864.563.064.065.365.764.465.465.264.663.664.564.866.164.860.8

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperations


Income
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value8.9411.2575.0387.65612128.91611103.072-0.4539.0945.5197.3878.4747.5997.651138.7088.0277.0246.4173.7134.6024.6824.2233.0773.2382.6742.9621.6891.7490.0160.121-0.093
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax144.438.4107.6669.8148.5114.394.2115.194.832.2-4.682.67.210.011.210.610.819.013.012.210.69.56.07.27.26.54.95.24.24.72.93.10.00.2-0.2

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value111.7333.7886.499.82615161611159.209144.413-0.6919.731127.588101211101011191211109.095.3516.6586.9076.2584.5644.8654.8224.4982.6242.8710.560.31-0.00713-3.095-1.237
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax185.553.04.7138.7859.7190.616.7146.7126.1158.111.1130.246.3-7.111.9113.69.814.016.215.614.815.215.726.718.417.215.113.58.610.410.79.67.37.87.67.24.55.01.00.6-0.028.30.0-3.5

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value200000.0100000.0-109000.00-100000.0200000.0119000.0300000.0200000.0200000.027000.0200000.0171000.0-100000.0246000.0210000.0-79000.0-200000.0-34000.0600000.0-45000.087000.0-180000.0356000.035000.084000.0-34000.0665000.0-283000.0112000.0-216000.0473000.091000.0297000.0628000.0-5000.0215000.0218000.0141000.0309000.0129000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.23.1-0.10.0-8.72.50.12.72.12.10.01.81.8-1.00.31.9-0.1-0.3-0.00.8-0.10.1-0.30.50.10.1-0.11.0-0.50.2-0.30.70.10.51.0-0.00.40.40.30.50.2

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value151000.071000.0160000.0130000.0503000.051000.0370000.00444000.0157000.0125000.00306000.031000.0165000.00250000.046000.0182000.00384000.075000.0251000.00332000.050000.085000.00319000.0033000.0283000.0585000.0029000.0256000.0117000.00
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.42.20.22.844.00.60.40.04.71.60.20.03.20.30.20.00.30.10.20.00.50.10.40.00.50.10.10.00.50.00.10.40.90.00.00.40.20.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value141413131313131313131212121313131213121313121311111112131313131414141314141414141412121210
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax240.1428.216.4284.21166.3165.813.9122.0138.7138.415.6117.5133.1141.317.1126.016.418.116.717.218.318.318.215.816.817.918.919.821.621.321.322.623.423.721.923.425.025.227.326.226.927.70.035.536.3

us-gaap:InterestExpense dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value14141313131313131313121212131313121312131312131111111213
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax240.1428.216.4284.21166.3165.813.9122.0138.7138.415.6117.5133.1141.317.1126.016.418.116.717.218.318.318.215.816.817.918.919.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value9.02413111411151212131312121214131111101111121112101010101212121314131314131313
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax145.8399.514.7312.61038.9185.112.7113.7140.2137.915.7116.3135.0143.716.8106.614.614.515.315.816.916.817.014.115.015.815.818.320.119.920.421.722.121.123.521.323.823.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1.2572.8985.0387.6561212128.916116.673103.072-0.4537.0779.0945.5197.3878.8618.4747.5997.6518.212138.7088.0277.0246.4173.7134.6024.6824.2233.0773.238282.8171.6891.8560.3443.0520.219-0.698
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.43.6107.6669.8148.513.0114.394.2115.18.194.832.2-4.68.782.67.210.011.611.210.610.811.519.013.012.210.69.56.07.27.26.54.95.245.34.52.93.30.65.40.4-1.5

us-gaap:NetIncomeLoss dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1.5963.6656.4039.75715161611159.113144.197-0.6199.671127.5271012111010111812110.9168.9955.2576.588
Percentage of NetIncomeLoss127.0126.5127.1127.4127.4127.5127.7132.9136.5136.6136.6136.6136.6136.7136.8136.4138.7139.3139.4139.6139.6136.1140.1140.6141.213.0140.2141.6143.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax48.84.5136.8853.6189.316.6145.9125.2157.111.0129.644.0-6.311.8113.19.813.916.115.614.815.115.626.618.317.21.413.48.510.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value8.9411.2572.8985.0387.6561212128.916116.673103.072-0.4537.0779.0945.5197.3878.8618.4747.5997.6518.212138.7088.0277.0246.4173.7134.6024.6824.2233.0773.2382.6742.9621.6891.7490.0160.1210.219
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax144.438.43.6107.6669.8148.513.0114.394.2115.18.194.832.2-4.68.782.67.210.011.611.210.610.811.519.013.012.210.69.56.07.27.26.54.95.24.24.72.93.10.00.20.4

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-06-302020-06-30
Value119.757
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic127.0127.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax183.4853.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value111.5963.6656.4039.75715161611159.113144.197-0.4539.671127.5271012111010111812119.9318.9955.2576.5886.7686.1264.4314.733414.1522.4932.7390.5234.4860.323
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax183.448.84.5136.8853.6189.316.6145.9125.2157.111.0129.644.0-4.611.8113.19.813.916.115.614.815.115.626.618.317.214.913.48.510.310.59.47.07.666.06.64.34.81.08.00.6

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6364645967686759566055676757555750515048474747434243444443444343423943403940413831232317
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1954.379.81368.65171.8835.669.7603.9629.9586.073.3503.9711.2693.270.9507.674.068.467.266.567.066.666.667.064.864.866.165.871.568.268.467.269.268.062.769.670.269.675.873.173.267.20.067.358.7

us-gaap:OperatingExpenses dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Operating
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value6364645967686759566055676757555750515048474747434243444443
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1954.379.81368.65171.8835.669.7603.9629.9586.073.3503.9711.2693.270.9507.674.068.467.266.567.066.666.667.064.864.866.165.871.568.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2620162022282930242822271712232620232525232323232323222317202021191920191717141513159.981112
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax426.8613.320.2434.32011.8355.130.3269.9258.7298.926.7248.9181.0132.129.1240.626.031.632.833.533.033.433.433.035.235.233.934.228.531.831.632.830.832.032.130.429.830.426.326.926.832.80.032.741.3

us-gaap:OperatingIncomeLoss dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value26201620222829302428222717122326202325252323232323232223172020211919
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.1100.1100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax426.8613.320.2434.32011.8355.130.3269.9258.7298.926.7248.9181.0132.129.1240.626.031.632.833.533.033.433.433.035.235.233.934.228.531.931.632.830.832.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OperatingIncomeLoss us-gaap:StatementBusinessSegments

aat:MixedUseSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value4.579-0.107-1.2540.6620.1534.6046.2426.9185.9276.0516.3156.7755.9246.2366.1737.1065.9465.4286.1397.6475.9566.2626.4076.8025.6095.7474.8786.6994.43
Percentage of OperatingIncomeLoss17.3-0.5-7.63.30.716.020.822.824.221.028.624.834.348.325.926.829.723.324.430.025.126.526.828.923.924.721.729.125.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax74.0-3.3-1.514.113.456.76.361.562.662.87.661.862.263.77.664.67.77.48.010.18.38.99.09.58.48.77.39.97.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:MixedUseSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:MultifamilySegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value7.2467.0616.8276.9617.157.3157.0757.2888.0147.8267.4667.6917.6027.4276.8857.1296.9414.684.2434.7654.2083.4742.6192.8732.8032.8262.732.7882.656
Percentage of OperatingIncomeLoss27.435.241.634.331.125.423.624.032.727.233.828.244.157.528.926.934.620.116.918.717.814.711.012.211.912.212.112.115.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax117.0215.98.4148.7625.590.07.264.784.781.29.070.279.875.98.464.89.06.35.56.35.94.93.74.04.24.34.14.14.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:MultifamilySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:OfficeSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value3233313332323131201918192218171818181817171717171716161616
Percentage of OperatingIncomeLoss124.6165.0194.4163.5140.4113.4103.4102.685.567.081.669.7131.7145.272.770.991.478.073.369.374.874.572.075.872.572.173.472.192.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax531.81011.939.2710.02824.1402.731.3277.0221.1200.321.8173.4238.3191.721.2170.623.824.624.023.324.724.924.025.025.525.424.924.726.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:OfficeSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:RetailSegment


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1614131216181818182217181919191918181817171818181818181717
Percentage of OperatingIncomeLoss61.571.479.263.172.164.161.759.474.177.381.469.2111.8149.782.374.190.677.675.470.375.677.478.877.277.177.682.878.196.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax262.4438.216.0274.11451.0227.618.7160.3191.6231.121.8172.1202.3197.823.9178.223.624.524.723.624.925.926.325.427.127.328.026.727.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:RetailSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-74000.0-53000.0708000.0-531000.0162000.0108000.0288000.0-131000.0-50000.0-229000.0-21000.0-125000.0-148000.0209000.0-69000.0-99000.0192000.0310000.086000.0-577000.099000.024000.0343000.0-347000.0-23000.0-70000.089000.0-621000.01078000.0-64000.0276000.0-419000.0-65000.0-279000.0-441000.068000.0-150000.0-106000.0649000.0-108000.0530000.0-602000.0-679000.0-251000.071000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.2-1.60.9-11.314.21.30.3-1.2-0.5-2.4-0.0-1.1-1.62.1-0.1-0.90.20.40.1-0.80.10.00.5-0.5-0.0-0.10.1-0.91.7-0.10.4-0.6-0.1-0.4-0.70.1-0.3-0.21.2-0.21.0-1.30.0-0.70.2

us-gaap:OtherNonoperatingIncomeExpense dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-74000.0-53000.0708000.0-531000.0162000.0108000.0288000.0-131000.0-50000.0-229000.0-21000.0-125000.0-148000.0209000.0-69000.0-99000.0192000.0310000.086000.0-577000.099000.024000.0343000.0-347000.0-23000.0-70000.089000.0-621000.01064000.0-91000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.098.7142.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.2-1.60.9-11.314.21.30.3-1.2-0.5-2.4-0.0-1.1-1.62.1-0.1-0.90.20.40.1-0.80.10.00.5-0.5-0.0-0.10.1-0.91.7-0.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value111.7333.7886.499.82615161611159.209144.413-0.6919.731127.588101211101011191211109.095.3516.6586.9076.2584.5644.865414.2852.6242.8710.6554.6180.45513-2.996-1.1935.839
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax185.553.04.7138.7859.7190.616.7146.7126.1158.111.1130.246.3-7.111.9113.69.814.016.215.614.815.215.726.718.417.215.113.58.610.410.79.67.37.866.36.84.55.01.28.20.929.00.0-3.419.9

us-gaap:ProfitLoss dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value111.7333.7886.499.82615161611159.209144.413-0.6919.731127.588101211101011191211109.095.3516.6586.9076.2584.5644.865
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax185.553.04.7138.7859.7190.616.7146.7126.1158.111.1130.246.3-7.111.9113.69.814.016.215.614.815.215.726.718.417.215.113.58.610.410.79.67.37.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

aat:AmericanAssetsTrustL.P., us-gaap:GeneralPartner


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value9.0761.3945.1257.72512129.008116.769103.288-0.5257.1379.1545.587.4478.9228.5167.6427.6948.262138.7488.07
Percentage of ProfitLoss79.080.479.078.678.678.475.473.473.573.374.576.073.373.273.572.271.971.871.871.873.671.571.270.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax146.642.6109.5675.9149.8115.195.2116.08.295.534.5-5.48.783.27.210.111.711.210.610.911.619.113.112.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P. us-gaap:GeneralPartner0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:AmericanAssetsTrustL.P., us-gaap:LimitedPartner


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2.4110.3391.3652.1013.3123.5652.9334.0552.443.8061.125-0.1662.5943.3512.0082.8613.4863.3423.0083.0272.9645.4293.5363.309
Percentage of ProfitLoss21.019.621.021.421.421.624.626.626.526.725.524.026.726.826.527.828.128.228.228.226.428.528.829.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.910.429.2183.840.831.731.042.13.034.711.8-1.73.230.42.63.94.64.44.24.34.17.65.35.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P. us-gaap:LimitedPartner0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.4110.3391.3652.1013.3123.5652.9334.0552.443.8061.125-0.1662.5943.3512.0082.8613.4863.3423.0083.0272.9645.4293.5363.3092.9072.5781.5441.9862.0861.9031.3541.495
Percentage of ProfitLoss21.019.621.021.421.421.624.626.626.526.725.524.026.726.826.527.828.128.228.228.226.428.528.829.128.928.428.929.830.230.429.730.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.910.429.2183.840.831.731.042.13.034.711.8-1.73.230.42.63.94.64.44.24.34.17.65.35.04.43.82.53.13.22.92.22.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value9.0761.3945.1257.72512129.008116.769103.288-0.5257.1379.1545.587.4478.9228.5167.6427.6948.262138.7488.077.1396.5123.8074.6724.8214.3553.213.37
Percentage of ProfitLoss79.080.479.078.678.678.475.473.473.573.374.576.073.373.273.572.271.971.871.871.873.671.571.270.971.171.671.170.269.869.670.369.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax146.642.6109.5675.9149.8115.195.2116.08.295.534.5-5.48.783.27.210.111.711.210.610.911.619.113.112.210.79.76.17.37.56.75.15.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.1913.271814.681.1438.12598119.4669.64282109.539.78381117773767571707171666666676263646562626362575753565246333429
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

aat:MixedUseSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value115.1964.1876.3684.2741316171515151614151516
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax186.1158.95.1136.1373.9167.216.2151.5160.0157.418.8150.4156.7157.218.6152.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:MixedUseSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:MultifamilySegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value12121212121212121212121212121212
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax110.6241.6297.9197.3291.694.478.874.285.285.082.077.984.580.880.574.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax205.8383.715.3268.51090.4157.812.7112.4136.2133.815.4117.2132.4127.014.9112.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:MultifamilySegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:OfficeSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value44444444434443423027272731262626
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax386.9855.71059.1703.81026.7327.7273.9251.1199.4183.2175.7165.3207.9174.0176.0159.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax719.91359.354.5957.73839.0547.844.3380.3319.0288.433.0248.6325.8273.632.7242.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:OfficeSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:RetailSegment


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value22212020212526252529272526262726
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax199.5419.1485.8323.8502.9190.1165.1151.6170.8194.0174.2157.3176.9170.1182.5158.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax371.2665.725.0440.61880.3317.926.7229.6273.3305.332.8236.5277.2267.433.9241.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:RetailSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value918381848296989884858282858081827773767571707171666666676263646562626362575753565246333429
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1482.92567.6100.01802.97183.61190.7100.0873.8888.6884.9100.0752.8892.2825.2100.0748.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Revenuesdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value91838184829698988485828285808182777376757170717166666667626364656262
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1482.92567.6100.01802.97183.61190.7100.0873.8888.6884.9100.0752.8892.2825.2100.0748.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value304530492817284428462756279027882718221721982196218622132259227521712115198619891971197719781996197419661941193818921878183218401836182418271860171317221709172417221117
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Assetsdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value3045304928172844284627562790278827182217219821962186221322592275217121151986198919711977197819961974196619411832
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets aat:AmericanAssetsTrustL.P.100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value18181813156315781569147514961490142614111395138113681384141514271318125311481174116611571149116311641198117511671154115611451149114011451141120510511051102910341025962
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets59.759.555.555.555.253.553.653.552.563.763.562.962.662.562.662.760.759.357.859.159.158.558.158.359.061.060.560.261.061.562.562.462.162.862.564.861.361.060.260.059.586.1

us-gaap:Liabilities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Liabilitiesdei:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value1818181315631578156914751496149014261411139513811368138414151427131812531148117411661157114911631164119811751145
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets59.759.555.555.555.253.553.653.552.563.763.562.962.662.562.662.760.759.357.859.159.158.558.158.359.061.060.562.5
Percentage of Assets aat:AmericanAssetsTrustL.P.59.759.555.555.555.253.553.653.552.563.763.562.962.662.562.662.760.759.357.859.159.158.558.158.359.061.060.562.5

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value304530492817284428462756279027882718221721982196218622132259227521712115198619891971197719781996197419661941193818921878183218401836182418271860171317221709172417221117
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value3045304928172844284627562790278827182217219821962186221322592275217121151986198919711977197819961974196619411832
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets aat:AmericanAssetsTrustL.P.100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value125112571271128013001304131313171309807802812813823833836839834809792783793799801780737735738704686648651655634638610614620626
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets41.141.245.145.045.747.347.147.248.236.436.537.037.237.236.936.838.639.540.739.839.740.140.440.239.537.537.938.137.236.535.435.435.734.834.932.835.936.036.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value368380137155146529911544544756515582943119044614344394034545995787948656343423498100112123921004137312418
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.112.54.95.55.11.93.64.11.62.52.22.62.32.53.74.11.49.02.33.12.22.22.02.01.82.83.14.94.24.22.73.63.42.42.31.95.85.86.67.15.40.03.80.00.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value36838013715514652991154454475651558294311904461434439403454599578794842112
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.112.54.95.55.11.93.64.11.62.52.22.62.32.53.74.11.49.02.33.12.22.22.02.01.82.83.14.94.24.22.72.36.6
Percentage of Assets aat:AmericanAssetsTrustL.P.12.112.54.95.55.11.93.64.11.62.52.22.62.32.53.74.11.49.02.33.12.22.22.02.01.82.83.10.00.00.02.70.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value369382139156150561091265464576660659110440199545170
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.112.54.95.55.32.13.94.52.02.92.63.02.82.94.14.61.99.52.82.63.6

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312014-12-31
Value369382139156150561091265464576660659110440199545170
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.112.54.95.55.32.13.94.52.02.92.63.02.82.94.14.61.99.52.82.63.6
Percentage of Assets aat:AmericanAssetsTrustL.P.12.112.54.95.55.32.13.94.52.02.92.63.02.82.94.14.61.99.52.82.63.6

Land

us-gaap:Land us-gaap:InvestmentType

us-gaap:Land

us-gaap:RealEstateInvestment


Landus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value628628555555490490
Percentage of Land100.0100.0100.0100.0100.0100.0
Percentage of Assets22.322.525.324.624.724.8
Percentage of Assets us-gaap:RealEstateInvestment0.00.00.00.00.00.0

us-gaap:Land us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:RealEstateInvestment, aat:OfficeSegment


Landus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value225225143143143143
Percentage of Land35.835.825.825.829.329.3
Percentage of Assets8.08.16.56.47.27.3
Percentage of Assets us-gaap:RealEstateInvestment aat:OfficeSegment0.00.00.00.00.00.0

us-gaap:RealEstateInvestment, aat:RetailSegment


Landus-gaap:
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value254254262262245245
Percentage of Land40.440.447.347.350.150.1
Percentage of Assets9.09.112.011.612.412.4
Percentage of Assets us-gaap:RealEstateInvestment aat:RetailSegment0.00.00.00.00.00.0

Furniture And Fixtures Gross

us-gaap:FurnitureAndFixturesGross us-gaap:InvestmentType

us-gaap:FurnitureAndFixturesGross

us-gaap:RealEstateInvestment


Furniture
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value362623211615
Percentage of FurnitureAndFixturesGross100.0100.0100.0100.0100.0100.0
Percentage of Assets1.30.91.10.90.80.8
Percentage of Assets us-gaap:RealEstateInvestment0.00.00.00.00.00.0

us-gaap:FurnitureAndFixturesGross us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:RealEstateInvestment, aat:MixedUseSegment


Furniture
Period End2020-12-312019-12-31
Value157.187
Percentage of FurnitureAndFixturesGross43.027.5
Percentage of Assets0.60.3
Percentage of Assets us-gaap:RealEstateInvestment aat:MixedUseSegment0.00.0

us-gaap:RealEstateInvestment, aat:MultifamilySegment


Furniture
Period End2020-12-312019-12-31
Value1614
Percentage of FurnitureAndFixturesGross45.257.3
Percentage of Assets0.60.5
Percentage of Assets us-gaap:RealEstateInvestment aat:MultifamilySegment0.00.0

us-gaap:RealEstateInvestment, aat:OfficeSegment


Furniture
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value3.2363.0652.6712.0851.7641.265
Percentage of FurnitureAndFixturesGross8.911.711.29.810.68.4
Percentage of Assets0.10.10.10.10.10.1
Percentage of Assets us-gaap:RealEstateInvestment aat:OfficeSegment0.00.00.00.00.00.0

us-gaap:RealEstateInvestment, aat:RetailSegment


Furniture
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value1.0690.9110.570.3720.7020.491
Percentage of FurnitureAndFixturesGross2.93.52.41.74.23.3
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets us-gaap:RealEstateInvestment aat:RetailSegment0.00.00.00.00.00.0

Construction In Progress Gross

us-gaap:ConstructionInProgressGross

us-gaap:ConstructionInProgressGross


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1159391819490917383777160767468666154505252867322925923219515311689676249343234274.7863.4954.2851.1440.925
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.83.03.22.93.33.33.32.63.13.53.22.73.53.43.02.92.82.62.52.62.64.43.711.513.211.810.17.96.24.83.73.42.71.91.81.81.60.30.20.20.10.1

us-gaap:ConstructionInProgressGross dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value1159391819490917383777160767468666154505252867322925923219567
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.83.03.22.93.33.33.32.63.13.53.22.73.53.43.02.92.82.62.52.62.64.43.711.513.211.810.13.7
Percentage of Assets aat:AmericanAssetsTrustL.P.3.83.03.22.93.33.33.32.63.13.53.22.73.53.43.02.92.82.62.52.62.64.43.711.513.211.810.13.7

us-gaap:ConstructionInProgressGross us-gaap:InvestmentType

us-gaap:RealEstateInvestment


Construction
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value515149624464
Percentage of ConstructionInProgressGross56.356.469.691.087.887.8
Percentage of Assets1.81.82.32.72.23.2
Percentage of Assets us-gaap:RealEstateInvestment0.00.00.00.00.00.0

us-gaap:ConstructionInProgressGross us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:RealEstateInvestment, aat:MixedUseSegment


Construction
Period End2020-12-312019-12-31
Value0.6637.381
Percentage of ConstructionInProgressGross0.78.1
Percentage of Assets0.00.3
Percentage of Assets us-gaap:RealEstateInvestment aat:MixedUseSegment0.00.0

us-gaap:RealEstateInvestment, aat:MultifamilySegment


Construction
Period End2020-12-312019-12-31
Value1.8312.212
Percentage of ConstructionInProgressGross2.02.4
Percentage of Assets0.10.1
Percentage of Assets us-gaap:RealEstateInvestment aat:MultifamilySegment0.00.0

us-gaap:RealEstateInvestment, aat:OfficeSegment


Construction
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value433539524041
Percentage of ConstructionInProgressGross47.938.855.576.979.557.0
Percentage of Assets1.51.31.82.32.02.1
Percentage of Assets us-gaap:RealEstateInvestment aat:OfficeSegment0.00.00.00.00.00.0

us-gaap:RealEstateInvestment, aat:RetailSegment


Construction
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value5.176.4878.5983.0862.80520
Percentage of ConstructionInProgressGross5.77.112.14.55.628.5
Percentage of Assets0.20.20.40.10.11.1
Percentage of Assets us-gaap:RealEstateInvestment aat:RetailSegment0.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value0.1210.1830.5181.1782.0883.3375.1037.39911
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.10.10.20.30.40.6
Percentage of Assets us-gaap:AboveMarketLeases0.00.00.00.00.00.00.00.00.0

us-gaap:LeaseAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value2425262728293133346.2026.7997.448.0238.6999.549101110111314151718202223252729313438414545
Percentage of FiniteLivedIntangibleAssetsNet0.00.021758.70.00.00.017162.30.00.00.01312.50.00.00.0810.60.00.00.0571.00.00.00.0515.50.00.00.0465.10.00.00.0431.60.00.00.0398.80.0
Percentage of Assets0.80.80.91.01.01.11.11.21.30.30.30.30.40.40.40.50.50.50.60.70.70.80.90.91.01.11.21.31.41.61.71.92.12.32.52.7
Percentage of Assets us-gaap:LeaseAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value26316.2818.3719.83513182434
Percentage of FiniteLivedIntangibleAssetsNet21658.717062.31212.5710.6471.0415.5365.1331.6298.8
Percentage of Assets0.91.10.30.40.50.71.01.31.9
Percentage of Assets us-gaap:LeasesAcquiredInPlace0.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2728293025264.8635.5746.2786.9730.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.90.91.01.10.91.00.20.20.20.30.0

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value105103106108107112939193565246444542424045523638414647515253515356576064697381687476
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.43.83.83.84.13.33.33.42.52.42.12.12.01.91.91.92.22.71.81.92.12.32.42.62.72.82.62.83.03.13.33.53.84.04.44.04.34.5

us-gaap:OtherAssets dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value10510310610810711293919356524644454242404552363841464751525357
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.43.83.83.84.13.33.33.42.52.42.12.12.01.91.91.92.22.71.81.92.12.32.42.62.72.83.1
Percentage of Assets aat:AmericanAssetsTrustL.P.3.53.43.83.83.84.13.33.33.42.52.42.12.12.01.91.91.92.22.71.81.92.12.32.42.62.72.83.1

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value13111362123213291047103410699539529529521044104410441044943
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets46.548.856.158.852.752.355.149.250.450.752.056.756.957.257.255.2

us-gaap:LongTermDebt dei:LegalEntity, us-gaap:LongtermDebtType

aat:AmericanAssetsTrustL.P., us-gaap:SecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value110110110110110110161162162162182204205205279279280315445467467494579579579711812952
Percentage of LongTermDebt0.00.08.50.00.00.011.90.00.00.014.80.00.00.021.00.00.00.042.50.00.00.056.10.00.00.076.0100.0
Percentage of Assets3.63.63.93.93.94.05.85.86.07.38.39.39.49.312.412.312.914.922.423.523.725.029.329.029.336.241.952.0
Percentage of Assets aat:AmericanAssetsTrustL.P. us-gaap:SecuredDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:AmericanAssetsTrustL.P., us-gaap:UnsecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1537153611961196119611961195119510451045104510451045104510451044944844596596595545446
Percentage of LongTermDebt0.00.091.30.00.00.087.80.00.00.084.80.00.00.078.60.00.00.057.00.00.00.043.2
Percentage of Assets50.550.442.542.142.043.442.942.938.547.247.647.647.847.246.345.943.539.930.030.030.227.622.6
Percentage of Assets aat:AmericanAssetsTrustL.P. us-gaap:UnsecuredDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-24.237-22.16-18.036-14.957-24.465-23.221-20.245-19.046-17.822-1.918-0.5063.0723.8386.29310121326282222262930293031323336383941454744475053575933
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.8-0.7-0.6-0.5-0.9-0.8-0.7-0.7-0.7-0.1-0.00.10.20.30.50.50.61.31.51.11.11.41.51.51.51.51.61.71.81.92.12.12.32.52.62.42.82.93.13.33.53.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3328000.03328000.03232000.03232000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3428000.03428000.03328000.03328000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3531000.03531000.03428000.03428000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.10.10.10.1

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value3531000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.1

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value19
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.7

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2829303026265.386.1656.9427.6920.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.91.01.11.10.91.00.20.20.30.30.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value34353637
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets1.11.21.31.3

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value5833000.06108000.06384000.06665000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.20.20.20.2

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value125112571271128013001304131313171309807802812813823833836839834809792783793799801780737735738704686648651655634638610614620626
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets41.141.245.145.045.747.347.147.248.236.436.537.037.237.236.936.838.639.540.739.839.740.140.440.239.537.537.938.137.236.535.435.435.734.834.932.835.936.036.6

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value122712351253126512761281129312981291805802815817829844848852861838814805820828832810767766770737722686691696679685655662671679690697155170189
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets40.340.544.544.544.846.546.446.547.536.336.537.137.437.537.437.339.340.742.240.940.941.541.941.741.039.039.539.839.038.537.537.637.937.237.535.238.739.039.840.040.513.90.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-31
Value2.1221.9641.7531.0340.3520.6035.685.1625.8768.825101313131110101111-8.583-10.281-3.143-0.258-1.03-0.339-0.6180.0920.624-1.093-0.5210.00.00.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.20.20.10.10.00.00.40.40.51.11.31.71.71.61.41.21.21.31.4-1.1-1.3-0.4-0.0-0.1-0.0-0.10.00.1-0.1-0.10.00.00.0
Percentage of Assets0.10.10.10.00.00.00.20.20.20.40.50.60.60.60.50.50.50.50.6-0.4-0.5-0.2-0.0-0.1-0.0-0.00.00.0-0.1-0.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1448144714451443145414531452145014389289209209199199199179169058748748648648638638448007957947597356926916636566556546536526520.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest118.0117.1115.3114.0113.9113.4112.2111.8111.4115.3114.7112.9112.5110.9108.9108.1107.5105.1104.3107.4107.3105.3104.2103.7104.2104.2103.7103.0102.9101.8100.8100.096.8100.298.997.596.294.693.50.0
Percentage of Assets47.647.551.350.851.152.752.052.052.941.941.941.942.141.640.740.342.242.844.044.043.843.743.643.342.840.740.941.040.139.137.837.636.335.338.238.038.237.937.90.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.6050.6050.6050.6030.6010.6010.6010.5990.5970.4750.4740.4730.4730.4730.4730.4710.4710.4640.4570.4560.4540.4540.4540.4540.4490.4380.4370.4360.4260.4190.4050.4050.3970.3930.3930.3930.3930.3930.3930.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312010-12-31
Value-24.238-22.16-18.036-14.957-24.465-23.221-20.245-19.046-17.822-1.918-0.5063.0723.8386.29310121326282222262930293031323336383947530.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-2.0-1.8-1.4-1.2-1.9-1.8-1.6-1.5-1.4-0.2-0.10.40.50.81.21.41.63.13.52.72.83.33.53.73.63.94.14.24.55.05.55.76.97.90.0
Percentage of Assets-0.8-0.7-0.6-0.5-0.9-0.8-0.7-0.7-0.7-0.1-0.00.10.20.30.50.50.61.31.51.11.11.41.51.51.51.51.61.71.81.92.12.12.63.10.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-312011-06-302010-12-31
Value-199.955-192.098-176.56-164.462-154.516-150.226-144.378-139.307-135.497-130.841-128.778-122.293-120.008-110.55-97.28-91.695-88.595-81.921-77.296-74.328-71.433-67.724-64.066-60.976-64.024-62.409-60.291-57.269-54.186-48.619-44.09-40.007-25.625-28.007-15.1680.0
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-16.3-15.5-14.1-13.0-12.1-11.7-11.2-10.7-10.5-16.2-16.0-15.0-14.7-13.3-11.5-10.8-10.4-9.5-9.2-9.1-8.9-8.3-7.7-7.3-7.9-8.1-7.9-7.4-7.3-6.7-6.4-5.8-3.7-4.1-2.20.0
Percentage of Assets-6.6-6.3-6.3-5.8-5.4-5.5-5.2-5.0-5.0-5.9-5.9-5.6-5.5-5.0-4.3-4.0-4.1-3.9-3.9-3.7-3.6-3.4-3.2-3.1-3.2-3.2-3.1-3.0-2.9-2.6-2.4-2.2-1.4-1.6-0.90.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value605000.0605000.0605000.0603000.0601000.0601000.0601000.0599000.0597000.0475000.0474000.0473000.0473000.0473000.0473000.0471000.0471000.0464000.0457000.0456000.0454000.0454000.0454000.0454000.0449000.0438000.0437000.0436000.0426000.0419000.0405000.0405000.0405000.0397000.0397000.0393000.0393000.0393000.0393000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value144814471445144314541453145214501438928920920919919919917916905874874864864863863844800795794759735692691690664663656655654653
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.647.551.350.851.152.752.052.052.941.941.941.942.141.640.740.342.242.844.044.043.843.743.643.342.840.740.941.040.139.137.837.637.636.436.335.338.238.038.2

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value-199960000.0-192100000.0-176560000.0-164460000.0-154520000.0-150230000.0-144380000.0-139310000.0-135500000.0-130840000.0-128780000.0-122290000.0-120010000.0-110550000.0-97280000.0-91695000.0-88595000.0-81921000.0-77296000.0-74328000.0-71433000.0-67724000.0-64066000.0-60976000.0-64024000.0-62409000.0-60291000.0-57269000.0-54186000.0-48619000.0-44090000.0-40007000.0-35868000.0-30584000.0-25625000.0-46004000.0-40699000.0-34269000.0-28007000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-6.6-6.3-6.3-5.8-5.4-5.5-5.2-5.0-5.0-5.9-5.9-5.6-5.5-5.0-4.3-4.0-4.1-3.9-3.9-3.7-3.6-3.4-3.2-3.1-3.2-3.2-3.1-3.0-2.9-2.6-2.4-2.2-2.0-1.7-1.4-2.5-2.4-2.0-1.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2.1221.9641.7531.0340.3520.6035.685.1625.8768.825101313131110101111-8.583-10.281-3.143-0.258-1.03-0.339-0.6180.0920.624-1.093-0.5210.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets0.10.10.10.00.00.00.20.20.20.40.50.60.60.60.50.50.50.50.6-0.4-0.5-0.2-0.0-0.1-0.0-0.00.00.0-0.1-0.00.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value3.2163.0162.7371.8190.951.2687.7167.0157.92912141918181514141516-11.955-14.329-4.365-0.339-1.437-0.472-0.8710.130.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax151.6153.6156.1175.9269.9210.3135.8135.9134.9137.6137.4137.2137.2137.3137.5137.7138.1139.0139.7139.3139.4138.9131.4139.5139.2140.9141.30.0
Percentage of Assets0.10.10.10.10.00.00.30.30.30.50.70.90.90.80.70.60.70.70.8-0.6-0.7-0.2-0.0-0.1-0.0-0.00.00.0
Percentage of Assets aat:AmericanAssetsTrustL.P.0.10.10.10.10.00.00.30.30.30.50.70.90.90.80.70.60.70.70.8-0.6-0.7-0.2-0.0-0.1-0.0-0.00.00.0

Minority Interest

us-gaap:MinorityInterest

us-gaap:MinorityInterest


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-24.237-22.16-18.036-14.957-24.465-23.221-20.245-19.046-17.822-1.918-0.5063.0723.8386.29310121326282222262930293031323336383941454744475053575933
Percentage of MinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.8-0.7-0.6-0.5-0.9-0.8-0.7-0.7-0.7-0.1-0.00.10.20.30.50.50.61.31.51.11.11.41.51.51.51.51.61.71.81.92.12.12.32.52.62.42.82.93.13.33.53.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value1484000.01484000.01251000.01252000.01250000.01130000.01131000.01098000.0859000.0726000.0727000.0727000.02818000.0639000.0639000.0639000.0559000.0600000.0637000.0618000.0740000.0413000.0834000.0890000.01095000.01045000.01007000.0519000.0726000.0726000.0717000.0676000.0724000.0722000.0707000.0699000.0713000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value1484000.01484000.01251000.01252000.01250000.01130000.01131000.01098000.0859000.0726000.0727000.0727000.02818000.0639000.0639000.0639000.0559000.0600000.0637000.0618000.0740000.0413000.0834000.0890000.01095000.01045000.01007000.0519000.0726000.0726000.0717000.0676000.0724000.0722000.0707000.0699000.0713000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:StatementEquityComponents

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value4.5314.5314.0453.2784.9174.5894.5894.814.6384.6424.643
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3442174023453151333617363843204136471939293420322532243122271828202520201618132313151012
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax552.81299.421.9855.32078.8558.332.0461.4352.2382.021.3333.9402.4449.524.6380.646.764.826.051.640.848.428.945.437.749.236.446.135.943.828.244.131.841.332.631.929.132.425.241.125.732.632.036.0

us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value344217402345315133361736384320413647193929342032253224312227
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax552.81299.421.9855.32078.8558.332.0461.4352.2382.021.3333.9402.4449.524.6380.646.764.826.051.640.848.428.945.437.749.236.446.135.943.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-24.875-12.216-15.503-14.441-15.208-23.925-25.153-23.98-527.613-22.437-27.554-13.383-12.045-11.365-12.236-61.72-243.336-13.272-16.323-14.284-15.012-17.895-8.169-25.185-48.746-45.169-53.886-35.096-32.259-31.599-23.079-13.06-12.393-9.72260-211.4-5.643-37.912-10.78320-92.143-149.549-14.117-2.366
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-401.8-373.5-19.1-308.6-1330.5-294.5-25.4-213.0-5573.8-232.7-33.4-122.1-126.4-116.2-15.0-560.8-315.6-18.0-21.3-18.8-20.9-25.3-11.4-35.3-73.0-68.4-81.1-52.1-51.9-49.4-35.7-20.0-19.7-15.696.1-336.4-9.8-66.5-20.036.9-176.3-319.0-42.1-6.8

us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-24.875-12.216-15.503-14.441-15.208-23.925-25.153-23.98-527.613-22.437-27.554-13.383-12.045-11.365-12.236-61.72-243.336-13.272-16.323-14.284-15.012-17.895-8.169-25.185-48.746-45.169-53.886-35.096-32.259-31.599
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-401.8-373.5-19.1-308.6-1330.5-294.5-25.4-213.0-5573.8-232.7-33.4-122.1-126.4-116.2-15.0-560.8-315.6-18.0-21.3-18.8-20.9-25.3-11.4-35.3-73.0-68.4-81.1-52.1-51.9-49.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-21.514212-19.842-19.11684-74.059-23.16243484-7.3511.094-17.786-30.814-59.336-20.0518248110-20.771-6.821-14.398-12.283-12.745-1.9763.8937.941-6.116209.29134-11.9-13.37511-14.457-73.649127-13.2677.341-13.257-13.215701927.955-4.449
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-347.56506.0-24.4-408.57410.9-911.5-23.4387.55117.7-76.21.3-162.3-323.3-606.5-24.5751.063.0150.1-27.1-9.0-20.0-17.4-17.8-2.85.812.0-9.230.214.953.3-18.4-20.518.7-23.3-116.7203.2-22.912.9-24.6-23.5135.5411.123.7-12.7

us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-21.514212-19.842-19.11684-74.059-23.16243484-7.3511.094-17.786-30.814-59.336-20.0518248110-20.771-6.821-14.398-12.283-12.745-1.9763.8937.941-6.116209.29134
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-347.56506.0-24.4-408.57410.9-911.5-23.4387.55117.7-76.21.3-162.3-323.3-606.5-24.5751.063.0150.1-27.1-9.0-20.0-17.4-17.8-2.85.812.0-9.230.214.953.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-12.168243-17.5096.4793-52.623-16.61171-9.8357.043-8.8665.427-4.514-26.729-12.37763-159.355145
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-196.57432.0-21.5138.28159.2-647.7-16.8635.9-103.973.0-10.749.5-47.4-273.2-15.1579.1-206.7196.8

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-12.168243-17.5096.4793-52.623-16.61171-9.8357.043-8.8665.427-4.514-26.729-12.37763-159.355145
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-196.57432.0-21.5138.28159.2-647.7-16.8635.9-103.973.0-10.749.5-47.4-273.2-15.1579.1-206.7196.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2727272626272626222021193233192124171817171717151515151618161616161716161414
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value272727262627262622202119323319212417181717171715151515161816
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1911000.01841000.0-2562000.03680000.07454000.0-3632000.01803000.0-909000.0643000.0-466000.01337000.01219000.0-1643000.0-577000.01327000.02463000.0-948000.0-1726000.0783000.01792000.0-216000.0-12000.0-586000.02516000.0-45000.0-874000.0-474000.02574000.0-1357000.0-1022000.0-974000.0-54000.0-125000.01198000.0382000.01278000.0-230000.0-1493000.0304000.01752000.0101000.01409000.0-242000.01099000.0
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsReceivable dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-1911000.01841000.0-2562000.03680000.07454000.0-3632000.01803000.0-909000.0643000.0-466000.01337000.01219000.0-1643000.0-577000.01327000.02463000.0-948000.0-1726000.0783000.01792000.0-216000.0-12000.0-586000.02516000.0-45000.0-874000.0-474000.02574000.0-1357000.0-1022000.0
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3442174023453151333617363843204136471939293420322532243122271828202520201618132313151012
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax552.81299.421.9855.32078.8558.332.0461.4352.2382.021.3333.9402.4449.524.6380.646.764.826.051.640.848.428.945.437.749.236.446.135.943.828.244.131.841.332.631.929.132.425.241.125.732.632.036.0

us-gaap:NetCashProvidedByUsedInOperatingActivities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value344217402345315133361736384320413647193929342032253224312227
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax552.81299.421.9855.32078.8558.332.0461.4352.2382.021.3333.9402.4449.524.6380.646.764.826.051.640.848.428.945.437.749.236.446.135.943.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1.2572.8985.0387.6561212128.916116.673103.072-0.4537.0779.0945.5197.3878.8618.4747.5997.6518.212138.7088.0277.0246.4173.7134.6024.6824.2233.0773.238282.8171.6891.8560.3443.0520.219-0.698
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.43.6107.6669.8148.513.0114.394.2115.18.194.832.2-4.68.782.67.210.011.611.210.610.811.519.013.012.210.69.56.07.27.26.54.95.245.34.52.93.30.65.40.4-1.5

us-gaap:NetIncomeLoss dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1.5963.6656.4039.75715161611159.113144.197-0.6199.671127.5271012111010111812110.9168.9955.2576.588
Percentage of NetIncomeLoss127.0126.5127.1127.4127.4127.5127.7132.9136.5136.6136.6136.6136.6136.7136.8136.4138.7139.3139.4139.6139.6136.1140.1140.6141.213.0140.2141.6143.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax48.84.5136.8853.6189.316.6145.9125.2157.111.0129.644.0-6.311.8113.19.813.916.115.614.815.115.626.618.317.21.413.48.510.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value111.7333.7886.499.82615161611159.209144.413-0.6919.731127.588101211101011191211109.095.3516.6586.9076.2584.5644.865414.2852.6242.8710.6554.6180.45513-2.996-1.1935.839
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax185.553.04.7138.7859.7190.616.7146.7126.1158.111.1130.246.3-7.111.9113.69.814.016.215.614.815.215.726.718.417.215.113.58.610.410.79.67.37.866.36.84.55.01.28.20.929.0-8.9-3.419.9

us-gaap:ProfitLoss dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value111.7333.7886.499.82615161611159.209144.413-0.6919.731127.588101211101011191211109.095.3516.6586.9076.2584.5644.865
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax185.553.04.7138.7859.7190.616.7146.7126.1158.111.1130.246.3-7.111.9113.69.814.016.215.614.815.215.726.718.417.215.113.58.610.410.79.67.37.8
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

aat:AmericanAssetsTrustL.P., us-gaap:GeneralPartner


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value9.0761.3945.1257.72512129.008116.769103.288-0.5257.1379.1545.587.4478.9228.5167.6427.6948.262138.7488.07
Percentage of ProfitLoss79.080.479.078.678.678.475.473.473.573.374.576.073.373.273.572.271.971.871.871.873.671.571.270.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax146.642.6109.5675.9149.8115.195.2116.08.295.534.5-5.48.783.27.210.111.711.210.610.911.619.113.112.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P. us-gaap:GeneralPartner0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

aat:AmericanAssetsTrustL.P., us-gaap:LimitedPartner


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value2.4110.3391.3652.1013.3123.5652.9334.0552.443.8061.125-0.1662.5943.3512.0082.8613.4863.3423.0083.0272.9645.4293.5363.309
Percentage of ProfitLoss21.019.621.021.421.421.624.626.626.526.725.524.026.726.826.527.828.128.228.228.226.428.528.829.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.910.429.2183.840.831.731.042.13.034.711.8-1.73.230.42.63.94.64.44.24.34.17.65.35.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P. us-gaap:LimitedPartner0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2.4110.3391.3652.1013.3123.5652.9334.0552.443.8061.125-0.1662.5943.3512.0082.8613.4863.3423.0083.0272.9645.4293.5363.3092.9072.5781.5441.9862.0861.9031.3541.495
Percentage of ProfitLoss21.019.621.021.421.421.624.626.626.526.725.524.026.726.826.527.828.128.228.228.226.428.528.829.128.928.428.929.830.230.429.730.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax38.910.429.2183.840.831.731.042.13.034.711.8-1.73.230.42.63.94.64.44.24.34.17.65.35.04.43.82.53.13.22.92.22.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:NoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Profit
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value9.0761.3945.1257.72512129.008116.769103.288-0.5257.1379.1545.587.4478.9228.5167.6427.6948.262138.7488.077.1396.5123.8074.6724.8214.3553.213.37
Percentage of ProfitLoss79.080.479.078.678.678.475.473.473.573.374.576.073.373.273.572.271.971.871.871.873.671.571.270.971.171.671.170.269.869.670.369.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax146.642.6109.5675.9149.8115.195.2116.08.295.534.5-5.48.783.27.210.111.711.210.610.911.619.113.112.210.79.76.17.37.56.75.15.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value1484000.01484000.02554000.01251000.01252000.01250000.01118000.01130000.01131000.01098000.0859000.0726000.0727000.0727000.02818000.0639000.0639000.0639000.0559000.0600000.0637000.0618000.0740000.0413000.0834000.0890000.01095000.01045000.01007000.0519000.0726000.0726000.0717000.0676000.0724000.0722000.0707000.0699000.0713000.0712000.0699000.0491000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1484000.01484000.02554000.01251000.01252000.01250000.01118000.01130000.01131000.01098000.0859000.0726000.0727000.0727000.02818000.0639000.0639000.0639000.0559000.0600000.0637000.0618000.0740000.0413000.0834000.0890000.01095000.01045000.01007000.0519000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-24.875-12.216-15.503-14.441-15.208-23.925-25.153-23.98-527.613-22.437-27.554-13.383-12.045-11.365-12.236-61.72-243.336-13.272-16.323-14.284-15.012-17.895-8.169-25.185-48.746-45.169-53.886-35.096-32.259-31.599-23.079-13.06-12.393-9.72260-211.4-5.643-37.912-10.78320-92.143-149.549-14.117-2.366
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-401.8-373.5-19.1-308.6-1330.5-294.5-25.4-213.0-5573.8-232.7-33.4-122.1-126.4-116.2-15.0-560.8-315.6-18.0-21.3-18.8-20.9-25.3-11.4-35.3-73.0-68.4-81.1-52.1-51.9-49.4-35.7-20.0-19.7-15.696.1-336.4-9.8-66.5-20.036.9-176.3-319.0-42.1-6.8

us-gaap:NetCashProvidedByUsedInInvestingActivities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-24.875-12.216-15.503-14.441-15.208-23.925-25.153-23.98-527.613-22.437-27.554-13.383-12.045-11.365-12.236-61.72-243.336-13.272-16.323-14.284-15.012-17.895-8.169-25.185-48.746-45.169-53.886-35.096-32.259-31.599
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-401.8-373.5-19.1-308.6-1330.5-294.5-25.4-213.0-5573.8-232.7-33.4-122.1-126.4-116.2-15.0-560.8-315.6-18.0-21.3-18.8-20.9-25.3-11.4-35.3-73.0-68.4-81.1-52.1-51.9-49.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Productive Assets

us-gaap:PaymentsToAcquireProductiveAssets dei:LegalEntity, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireProductiveAssets

aat:AmericanAssetsTrustL.P., aat:EastgateOfficePark, us-gaap:SubsequentEvent


Payments
Period End2021-07-07
Value125
Percentage of PaymentsToAcquireProductiveAssets100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-21.514212-19.842-19.11684-74.059-23.16243484-7.3511.094-17.786-30.814-59.336-20.0518248110-20.771-6.821-14.398-12.283-12.745-1.9763.8937.941-6.116209.29134-11.9-13.37511-14.457-73.649127-13.2677.341-13.257-13.215701927.955-4.449
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-347.56506.0-24.4-408.57410.9-911.5-23.4387.55117.7-76.21.3-162.3-323.3-606.5-24.5751.063.0150.1-27.1-9.0-20.0-17.4-17.8-2.85.812.0-9.230.214.953.3-18.4-20.518.7-23.3-116.7203.2-22.912.9-24.6-23.5135.5411.123.7-12.7

us-gaap:NetCashProvidedByUsedInFinancingActivities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-21.514212-19.842-19.11684-74.059-23.16243484-7.3511.094-17.786-30.814-59.336-20.0518248110-20.771-6.821-14.398-12.283-12.745-1.9763.8937.941-6.116209.29134
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-347.56506.0-24.4-408.57410.9-911.5-23.4387.55117.7-76.21.3-162.3-323.3-606.5-24.5751.063.0150.1-27.1-9.0-20.0-17.4-17.8-2.85.812.0-9.230.214.953.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax aat:AmericanAssetsTrustL.P.0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value21211919152222211818181717171716161616151515151414141413131312121212121212121212129.784
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividends dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value212119191522222118181817171717161616161515151514141414131313
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2121191522211818181717171716161616151515151414141413131312121212
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividendsus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value161615121816131313121212121212121111111111101010109.5959.3749.2018.9048.4948.4948.329
Percentage of Dividends78.978.978.878.678.678.574.973.473.473.373.373.373.373.373.372.271.971.871.771.771.771.771.471.070.970.970.470.069.369.369.268.8

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value570000.0570000.0570000.0501000.0332000.0332000.0332000.095000.095000.093000.0100000.0116000.0100000.0123000.0123000.0201000.0265000.0265000.0265000.0176000.0176000.0174000.0174000.0204000.0219000.0219000.0219000.0233000.0233000.0233000.0233000.0280000.0320000.0320000.0320000.0320000.0
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments

aat:AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value368000.0367000.0368000.0374000.0371000.0372000.0356000.0368000.0365000.0359000.0360000.0446000.0433000.0445000.0464000.01716000.01119000.01116000.01113000.01125000.01054000.01054000.01061000.01045000.01029000.01015000.01016000.01015000.0983000.0983000.0983000.0983000.0947000.0985000.01005000.0974000.01030000.01029000.01030000.0865000.0143000.0101000.0
Percentage of AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value368000.0367000.0368000.0374000.0371000.0372000.0356000.0368000.0365000.0359000.0360000.0446000.0433000.0445000.0464000.01716000.01119000.01116000.01113000.01125000.01054000.01054000.01061000.01045000.01029000.01015000.01016000.01015000.0
Percentage of AmortizationOfDebtIssuanceCostsAndDebtFairValueAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:AmountRecoveredForReimbursementsOfOperatingExpenseForRelatedParty us-gaap:RelatedPartyTransactionsByRelatedParty

aat:AmountRecoveredForReimbursementsOfOperatingExpenseForRelatedParty

aat:WBWCHPLLC


Amount
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value200000.0300000.0200000.0300000.0200000.0300000.0200000.0400000.0300000.0200000.0300000.0300000.0200000.0300000.0200000.0300000.0200000.0300000.0200000.0300000.0200000.0200000.0300000.0300000.0200000.0200000.0200000.0400000.0200000.0300000.0300000.0300000.0300000.0200000.0500000.00
Percentage of AmountRecoveredForReimbursementsOfOperatingExpenseForRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

aat:CapitalExpendituresandLeasingCommissions

aat:CapitalExpendituresandLeasingCommissions


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value24121514152325232822271312111316138.155151415172026464452343131231212109.73515
Percentage of CapitalExpendituresandLeasingCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:CapitalExpendituresandLeasingCommissions us-gaap:StatementBusinessSegments

aat:MixedUseSegment


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.6840.0040.2350.3222.2620.8833.9820.8453.2710.3920.4750.2190.4290.1540.2560.2110.1130.090.6790.10.0510.0650.0470.050.1660.3711.750.4452.115
Percentage of CapitalExpendituresandLeasingCommissions2.80.01.52.214.93.715.83.511.71.71.71.63.61.41.81.30.81.14.30.70.30.40.20.20.40.83.41.36.7

aat:MultifamilySegment


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1.0330.9630.9530.80.861.2840.9581.2970.6850.7710.6390.5360.8751.6091.7971.9532.1090.4590.4310.2130.4751.3446.185162928342519
Percentage of CapitalExpendituresandLeasingCommissions4.27.96.15.55.75.43.85.42.43.42.34.07.314.212.911.815.35.62.71.53.17.630.662.063.964.466.771.962.6

aat:OfficeSegment


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value219.52712129.2811814161716209.4077.5137.3739.308108.86.3613111010117.6161414117.2478.59
Percentage of CapitalExpendituresandLeasingCommissions85.978.082.887.161.076.156.169.062.273.575.870.362.464.966.863.963.778.083.582.269.261.658.528.332.032.722.420.827.2

aat:RetailSegment


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1.7781.7221.4860.7472.8053.5586.1135.296.654.7915.5413.2213.2282.2292.5633.8032.81.2461.5042.2034.255.4142.1582.5441.7560.9353.9462.0941.125
Percentage of CapitalExpendituresandLeasingCommissions7.214.19.65.218.414.924.322.123.721.420.124.126.819.618.423.020.315.39.515.627.430.510.79.53.82.17.66.03.6

aat:DeferredRentRepaymentsCOVID19

aat:DeferredRentRepaymentsCOVID19


Deferred
Period End2021-06-302021-03-31
Value800000.0700000.0
Percentage of DeferredRentRepaymentsCOVID19100.0100.0

aat:DeferredRentRepaymentsCOVID19Percentage

aat:DeferredRentRepaymentsCOVID19Percentage


Deferred
Period End2021-06-302021-03-31
Value94.088.0
Percentage of DeferredRentRepaymentsCOVID19Percentage100.0100.0

aat:DeferredRentRevenueAndAmortizationOfLeaseIntangibles

aat:DeferredRentRevenueAndAmortizationOfLeaseIntangibles


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-2646000.0-6292000.0-11217000.0-6834000.0-9429000.0-3762000.0-3333000.0-6214000.03673000.0-1111000.0-1310000.0-1943000.02049000.047000.0-314000.0-836000.0-390000.0-1007000.0-340000.0-510000.0-823000.0-964000.0-1381000.0-1597000.0-1256000.0-1353000.0-263000.0-1554000.0-1261000.0-1545000.0-1404000.0-1719000.0-711000.0-1163000.0-1446000.0-2239000.0-1854000.0-1428000.0-977000.0-908000.0-954000.0223000.01025000.0738000.0
Percentage of DeferredRentRevenueAndAmortizationOfLeaseIntangibles100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:DeferredRentRevenueAndAmortizationOfLeaseIntangibles dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-2646000.0-6292000.0-11217000.0-6834000.0-9429000.0-3762000.0-3333000.0-6214000.03673000.0-1111000.0-1310000.0-1943000.02049000.047000.0-314000.0-836000.0-390000.0-1007000.0-340000.0-510000.0-823000.0-964000.0-1381000.0-1597000.0-1256000.0-1353000.0-263000.0-1554000.0-1261000.0-1545000.0
Percentage of DeferredRentRevenueAndAmortizationOfLeaseIntangibles100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:DirectCostsOfLeasedPropertyLessorExpense

aat:DirectCostsOfLeasedPropertyLessorExpense


Direct
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value9.6559.4969.5018.6959.882109.0088.551
Percentage of DirectCostsOfLeasedPropertyLessorExpense100.0100.0100.0100.0100.0100.0100.0100.0

aat:IncreaseDecreaseAccruedConstructioninProgress

aat:IncreaseDecreaseAccruedConstructioninProgress


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2.5867.1098.463-3.721.6169.3883.78-0.593120.9988.573-0.486-0.7060.273-5.1321.5360.5770.0361.068-1.710.171-5.641-4.04-5.2570.2050.926
Percentage of IncreaseDecreaseAccruedConstructioninProgress100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:IncreaseDecreaseAccruedLeasingCommissions

aat:IncreaseDecreaseAccruedLeasingCommissions


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value341000.0631000.0-434000.0-924000.0-170000.02083000.0406000.0-5024000.07300000.0663000.02669000.0-175000.0330000.0710000.0-684000.0912000.0305000.0193000.0-630000.0282000.0-258000.0251000.0-470000.017000.0-282000.0-166000.0887000.0-278000.0784000.0-630000.0897000.099000.0-300000.0689000.0
Percentage of IncreaseDecreaseAccruedLeasingCommissions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:IncreaseDecreaseinSecurityDepositsPayable

aat:IncreaseDecreaseinSecurityDepositsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value100000.039000.061000.0-1156000.0-661000.030000.0462000.0-53000.0-115000.0-1265000.0
Percentage of IncreaseDecreaseinSecurityDepositsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:IncreaseDecreaseinSecurityDepositsPayable dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value100000.039000.061000.0-1156000.0-661000.030000.0462000.0-53000.0-115000.0-1265000.0
Percentage of IncreaseDecreaseinSecurityDepositsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits

aat:IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1616-0.044293161616-0.095921161617-0.00274217170.0-0.059564171717-0.002306171717-0.00018171717-0.000367171717-0.00811817171818299181818174531818
Percentage of IncrementalCommonSharesAttributableToConversionOfOperatingPartnershipUnits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:LeaseConcessions

aat:LeaseConcessions


Lease
Period End2020-09-302020-06-30
Value2.00.05
Percentage of LeaseConcessions100.0100.0

aat:LeaseRentalIncome us-gaap:StatementBusinessSegments

aat:LeaseRentalIncome

aat:MixedUseSegment


Lease
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value3.4380.7950.9022.5043.9323.8693.8863.877
Percentage of LeaseRentalIncome100.0100.0100.0100.0100.0100.0100.0100.0

aat:MultifamilySegment


Lease
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1111111111111111
Percentage of LeaseRentalIncome342.11478.21304.9465.0304.3303.0308.2309.4

aat:OfficeSegment


Lease
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value4343434242402826
Percentage of LeaseRentalIncome1251.15454.34788.61696.61073.61038.7735.0674.4

aat:RetailSegment


Lease
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2120182024252524
Percentage of LeaseRentalIncome627.52623.02032.6835.0634.7647.8643.9630.6

aat:MinorityInterestInContinuingOperationsIncomeLossOperatingPartnerships

aat:MinorityInterestInContinuingOperationsIncomeLossOperatingPartnerships


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-2.411-0.339-0.767-1.365-2.101-3.312-3.536-3.565-2.933-4.055-2.44-3.806-1.1250.166-2.594-3.351-2.008-2.861-3.486-3.342-3.0083.0272.9615.4323.5363.3092.9072.5781.5441.9862.0861.9031.3541.495-7.3291.4030.8040.8830.8520.057-0.046
Percentage of MinorityInterestInContinuingOperationsIncomeLossOperatingPartnerships100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted

aat:MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value-2411000.0-339000.0-1365000.0-2101000.0-3312000.0-3565000.0-2933000.0-4055000.0-3806000.0-1125000.00-3351000.0-2008000.0-2861000.0
Percentage of MinorityInterestInContinuingOperationsIncomeLossOperatingPartnershipsDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

aat:NetIncomeAttributableToRestrictedShare

aat:NetIncomeAttributableToRestrictedShare


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value135000.0137000.0123000.087000.069000.0104000.0104000.092000.092000.093000.096000.071000.0216000.0-72000.060000.060000.061000.060000.061000.042000.043000.043000.053000.032000.040000.043000.0115000.095000.094000.070000.0139000.0132000.0133000.0-132000.0133000.0-133000.0-131000.0132000.0132000.0-132000.0-132000.086000.0
Percentage of NetIncomeAttributableToRestrictedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:NetIncomeAttributableToRestrictedShare dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value135000.0137000.0123000.087000.069000.0104000.0104000.092000.092000.093000.096000.071000.0216000.0-72000.060000.060000.061000.060000.061000.042000.043000.043000.053000.032000.040000.043000.0-115000.0-95000.0-94000.0-70000.0-139000.0-132000.0-133000.0-132000.0
Percentage of NetIncomeAttributableToRestrictedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0100.0

aat:OtherNoncashInterestExpense

aat:OtherNoncashInterestExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value275000.0275000.0333000.0332000.0332000.0333000.02276000.0-333000.0-319000.0-320000.0-320000.0-320000.0-319000.0-320000.0-320000.0-319000.0-330000.0-145000.0-58000.0-58000.0
Percentage of OtherNoncashInterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:OtherNoncashInterestExpense dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value275000.0275000.0333000.0332000.0332000.0333000.02276000.0-333000.0-319000.0-320000.0-320000.0-320000.0-319000.0-320000.0-320000.0-319000.0-330000.0-145000.0-58000.0-58000.0
Percentage of OtherNoncashInterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:OtherRealEstateRentalRevenue

aat:OtherRealEstateRentalRevenue


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value562000.0571000.0557000.0527000.0524000.0577000.0822000.0493000.0455000.0453000.0458000.0417000.0367000.0369000.0445000.0433000.0409000.0380000.0386000.0369000.0372000.0385000.0355000.0354000.0390000.0393000.0406000.0444000.0412000.0419000.0428000.0424000.0405000.0431000.0385000.0390000.0380000.0439000.0353000.0397000.0364000.0
Percentage of OtherRealEstateRentalRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:PaymentsRelatedToPartnershipContribution dei:LegalEntity

aat:PaymentsRelatedToPartnershipContribution

aat:AmericanAssetsTrustL.P.


Payments
Period End2020-09-302020-06-302020-03-31
Value00119000.0
Percentage of PaymentsRelatedToPartnershipContribution0.00.0100.0

aat:PercentageOfInvestmentInRelatedParty

aat:PercentageOfInvestmentInRelatedParty


Percentage
Period End2021-06-302021-03-312020-12-31
Value047.70
Percentage of PercentageOfInvestmentInRelatedParty0.0100.00.0

aat:PropertyExpenses us-gaap:StatementBusinessSegments

aat:PropertyExpenses

aat:MixedUseSegment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value6.945.3035.4415.7064.1218.9799.775109.2189.1269.2139.7089.019.1458.9969.6238.8249.6929.1389.3948.6448.4848.9819.518.3038.3638.1378.7317.542
Percentage of PropertyExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:MultifamilySegment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value5.4935.4915.6485.6035.3135.515.545.3674.8835.0735.2675.1575.024.9975.3245.2814.0823.2113.5383.2882.8522.823.0822.1261.6421.4841.5861.5321.554
Percentage of PropertyExpenses79.1103.5103.898.2128.961.456.753.053.055.657.253.155.754.659.254.946.333.138.735.033.033.234.322.419.817.719.517.520.6

aat:OfficeSegment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value11111211111112119.2698.4899.2628.2438.3428.0139.47.8748.0457.8018.4448.1467.5477.7027.8367.1986.9886.8217.2126.8136.085
Percentage of PropertyExpenses167.8214.3228.5203.2281.5131.3131.4114.8100.693.0100.584.992.687.6104.581.891.280.592.486.787.390.887.375.784.281.688.678.080.7

aat:RetailSegment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value6.7357.4427.3417.7954.9077.3317.9427.8067.7317.1549.0677.0627.1386.8118.1056.9346.7946.6917.7317.1596.9646.086.5876.8276.2586.06.7486.1976.448
Percentage of PropertyExpenses97.0140.3134.9136.6119.181.681.277.183.978.498.472.779.274.590.172.177.069.084.676.280.671.773.371.875.471.782.971.085.5

aat:RentConcessionsCOVID19

aat:RentConcessionsCOVID19


Rent
Period End2021-03-31
Value1.2
Percentage of RentConcessionsCOVID19100.0

aat:RentConcessionsCOVID19Percentage

aat:RentConcessionsCOVID19Percentage


Rent
Period End2021-03-31
Value2.0
Percentage of RentConcessionsCOVID19Percentage100.0

aat:WeightedAverageUnvestedParticipatingSecuritiesOutstanding dei:LegalEntity, us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

aat:WeightedAverageUnvestedParticipatingSecuritiesOutstanding

aat:AmericanAssetsTrustL.P., aat:OperatingPartnershipUnits


Weighted
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value489780.011435.0346430.0345240.0345150.0-1048.0329650.0330850.0333280.06143.0262600.0266260.0
Percentage of WeightedAverageUnvestedParticipatingSecuritiesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfAboveAndBelowMarketLeases

us-gaap:AmortizationOfAboveAndBelowMarketLeases


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value700000.0800000.01100000.0900000.01000000.0900000.01000000.01100000.0800000.0900000.01400000.0800000.0700000.0700000.0800000.0800000.0900000.0900000.0900000.0900000.0900000.0800000.0700000.0700000.0700000.0700000.0800000.0700000.0700000.0600000.0600000.01000000.0200000.0500000.0-900000.00200000.0-300000.0-2700000.0900000.0400000.0
Percentage of AmortizationOfAboveAndBelowMarketLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-06-302020-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value579000.0577000.0368000.0374000.0-145000.0-58000.0-58000.0-58000.0-57000.0-58000.0-57000.0-58000.0-58000.0-39000.0000
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Amortization
Period End2021-06-302021-03-312020-06-302020-03-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value579000.0577000.0368000.0374000.0-145000.0-58000.0-58000.0-58000.0-57000.0-58000.0-57000.0-58000.0-58000.0-39000.0000
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths

us-gaap:CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths


Cash
Period End2021-06-302021-03-312020-12-31
Value01100000.00
Percentage of CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths0.0100.00.0

us-gaap:ConcentrationRiskPercentage1 us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

us-gaap:ConcentrationRiskPercentage1

aat:TotalRevenues, aat:OfficeSegment


Concentration
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-31
Value52.90.460.3260.3320.3520.358
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0100.0100.0

aat:TotalRevenues, aat:RetailSegment


Concentration
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-31
Value25.90.2670.3450.3240.3360.345
Percentage of ConcentrationRiskPercentage149.058.0105.897.695.596.4

us-gaap:CostOfOtherPropertyOperatingExpense

us-gaap:CostOfOtherPropertyOperatingExpense


Cost
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2018162225232120232120202321
Percentage of CostOfOtherPropertyOperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfOtherPropertyOperatingExpense dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Cost
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2018162225232120232120202321
Percentage of CostOfOtherPropertyOperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CostOfPropertyRepairsAndMaintenance

us-gaap:CostOfPropertyRepairsAndMaintenance


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value4.0293.7424.9974.1994.324.2975.4714.1343.9713.4593.9333.1633.3893.0014.4193.2022.9842.5314.1993.0692.8712.5663.3843.0342.8342.2513.2022.4042.8722.1223.1842.7272.4892.1142.1332.7472.4242.0042.0092.4971.959
Percentage of CostOfPropertyRepairsAndMaintenance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2727272626272626222021193233192124171817171717151515151618161616161715161415151514129.642127.509
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value272727262627262622202119323319212417181717171715151515161816
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment

us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment


Direct
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value181916222321
Percentage of DirectCostsOfLeasedAndRentedPropertyOrEquipment100.0100.0100.0100.0100.0100.0

us-gaap:DirectCostsOfLeasedAndRentedPropertyOrEquipment dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Direct
Period End2020-09-302020-06-302019-09-302019-06-30
Value19162321
Percentage of DirectCostsOfLeasedAndRentedPropertyOrEquipment100.0100.0100.0100.0

us-gaap:ExciseAndSalesTaxes

us-gaap:ExciseAndSalesTaxes


Excise
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value634000.0532000.0551000.0556000.0507000.0865000.01203000.01099000.0914000.0944000.01237000.01094000.0969000.01033000.01253000.01231000.0945000.01025000.01261000.01255000.0976000.01019000.01293000.01186000.0943000.0986000.01101000.01080000.0835000.0965000.01191000.01071000.0952000.0939000.01060000.0996000.0895000.0862000.0863000.01028000.0774000.0
Percentage of ExciseAndSalesTaxes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3.44211-15.8959.995-0.6434.435-10.50513-3.6977.15-11.5896.543-3.6855.434-9.667110.0355.834-9.6128.102-1.8374.718-12.27210-2.9774.145-5.9176.285-3.6924.705-6.9045.409-3.2945.956-4.6474.307-2.0430.584-3.1637.156-0.943-0.5241.072.76
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value3.44211-15.8959.995-0.6434.435-10.50513-3.6977.15-11.5896.543-3.6855.434-9.667110.0355.834-9.6128.102-1.8374.718-12.27210-2.9774.145-5.9176.285-3.6924.705
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLeaseAcquisitionCosts

us-gaap:IncreaseDecreaseInLeaseAcquisitionCosts


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.6840.8440.7050.9920.4983.3942.3756.2691.1181.5054.8092.071.831.2271.1851.6481.1920.9021.7640.4220.7690.6171.2190.9621.4370.8432.2931.1770.6320.9961.0550.6331.0060.3380.7291.3620.8980.4671.5230.9010.6650.206-0.0150.874
Percentage of IncreaseDecreaseInLeaseAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLeaseAcquisitionCosts dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.6840.8440.7050.9920.4983.3942.3756.2691.1181.5054.8092.071.831.2271.1851.6481.1920.9021.7640.4220.7690.6171.2190.9621.4370.8432.2931.1770.6320.996
Percentage of IncreaseDecreaseInLeaseAcquisitionCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherDeferredLiability

us-gaap:IncreaseDecreaseInOtherDeferredLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value576000.0314000.0251000.0-668000.0-532000.0-257000.0398000.0-1257000.0-1140000.0-1586000.0397000.0515000.0-296000.0666000.0-192000.0-34000.0217000.0279000.0558000.0575000.0986000.0156000.0-314000.0-52000.0182000.0148000.0-1563000.0861000.0-225000.01115000.0-170000.018000.056000.0247000.0-6000.0-31000.0432000.0-209000.0
Percentage of IncreaseDecreaseInOtherDeferredLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherDeferredLiability dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value576000.0314000.0251000.0-668000.0-532000.0-257000.0398000.0-1257000.0-1140000.0-1586000.0397000.0515000.0-296000.0666000.0-192000.0-34000.0217000.0279000.0558000.0575000.0986000.0156000.0-314000.0-52000.0182000.0148000.0-1563000.0861000.0-225000.01115000.0
Percentage of IncreaseDecreaseInOtherDeferredLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value5070000.0-651000.01312000.0-550000.0-287000.0-616000.02398000.01327000.0-1260000.0-45000.0215000.0767000.0-1092000.0337000.0-49000.01016000.0-1506000.01038000.0959000.064000.0-739000.0698000.0-217000.0357000.0-1040000.01143000.0-61000.0-209000.0-15000.0392000.020000.030000.0-178000.0216000.0-1552000.01664000.0-1564000.01309000.0692000.0-1558000.01456000.0
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value5070000.0-651000.01312000.0-550000.0-287000.0-616000.02398000.01327000.0-1260000.0-45000.0215000.0767000.0-1092000.0337000.0-49000.01016000.0-1506000.01038000.0959000.064000.0-739000.0698000.0-217000.0357000.0-1040000.01143000.0-61000.0-209000.0-15000.0392000.0
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndOtherIncome

us-gaap:InterestAndOtherIncome


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value100000.074000.021000.032000.071000.0312000.0397000.0137000.0156000.07000.029000.046000.023000.0140000.0177000.0111000.0113000.0147000.09000.024000.024000.015000.055000.09000.012000.014000.054000.044000.050000.048000.060000.054000.026000.08000.07000.0177000.065000.087000.0535000.0388000.0786000.0
Percentage of InterestAndOtherIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalizedAdjustment

us-gaap:InterestCostsCapitalizedAdjustment


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value666000.0559000.0283000.0263000.0260000.0264000.0248000.050000.0145000.0185000.0273000.0304000.0454000.0457000.0417000.0406000.0376000.0371000.0331000.0342000.0335000.0543000.0514000.02279000.02443000.02333000.01974000.0
Percentage of InterestCostsCapitalizedAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsIncurred

us-gaap:InterestCostsIncurred


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value15141313131314131313131313141414131313131313131313141414141414151515141415131214
Percentage of InterestCostsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302019-12-312019-09-302019-06-30
Value194000.0-31000.0-142000.0200000.0
Percentage of LeaseCost100.0100.0100.0100.0

us-gaap:LeaseIncome

us-gaap:LeaseIncome


Lease
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-09-30
Value62000.060000.0183000.0128000.024000.0142000.0
Percentage of LeaseIncome100.0100.0100.0100.0100.0100.0

us-gaap:LossOnContractTerminationForDefault

us-gaap:LossOnContractTerminationForDefault


Loss
Period End2021-06-302021-03-312020-12-31
Value-400000.04900000.0-600000.0
Percentage of LossOnContractTerminationForDefault100.0100.0100.0

us-gaap:ManagementFeeExpense

us-gaap:ManagementFeeExpense


Management
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value283000.0207000.0199000.0272000.0135000.0417000.0502000.0545000.0480000.0482000.0492000.0529000.0478000.0488000.0481000.0606000.0473000.0486000.0485000.0551000.0468000.0475000.0497000.0533000.0450000.0458000.0415000.0502000.0382000.0453000.0427000.0488000.0422000.0472000.0495000.0534000.0
Percentage of ManagementFeeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketingExpense

us-gaap:MarketingExpense


Marketing
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value311000.0393000.0639000.0498000.0379000.0507000.0793000.0631000.0568000.0546000.0711000.0482000.0503000.0412000.0649000.0506000.0462000.0436000.0663000.0432000.0537000.0485000.0788000.0445000.0486000.0385000.0486000.0355000.0392000.0390000.0495000.0356000.0344000.0352000.0433000.0263000.0264000.0306000.0129000.0402000.0520000.0
Percentage of MarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAllocatedToGeneralPartners dei:LegalEntity

us-gaap:NetIncomeLossAllocatedToGeneralPartners

aat:AmericanAssetsTrustL.P.


Net
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3.6656.4039.75715161611159.113144.197-0.6199.671127.5271012111010111812117.0246.4173.7134.6024.6824.2233.0773.238
Percentage of NetIncomeLossAllocatedToGeneralPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable

us-gaap:NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable


Noncontrolling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2.4110.3390.7671.3652.1013.3123.5363.5652.9334.0552.443.8061.125-0.1662.5943.3512.0082.8613.4863.3423.0083.0272.9615.4323.5363.3092.9072.5781.5441.9862.0861.9031.3541.495131.3350.8040.883
Percentage of NoncontrollingInterestInNetIncomeLossOperatingPartnershipsRedeemable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1132000.01132000.01114000.0999000.0945000.0844000.0834000.0833000.0833000.0833000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeaseExpense


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1158000.01152000.01029000.0952000.0853000.0841000.0849000.0841000.0
Percentage of OperatingLeaseExpense100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLeaseIncome

us-gaap:OperatingLeaseLeaseIncome


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value8781807992937976
Percentage of OperatingLeaseLeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLeaseIncome dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value8781807992937976
Percentage of OperatingLeaseLeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLeaseIncome us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

aat:AmericanAssetsInc., srt:BoardOfDirectorsChairman


Operating
Period End2021-06-302021-03-012021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302019-03-01
Value0.00.20.10.10.00.10.00.10.2
Percentage of OperatingLeaseLeaseIncome0.00.10.00.00.00.10.00.10.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value865000.0865000.0865000.0865000.0846000.0846000.0846000.0846000.0828000.0827000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseVariableLeaseIncome

us-gaap:OperatingLeaseVariableLeaseIncome


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value1098000.0526000.01353000.023000.0301000.0553000.0289000.0266000.0
Percentage of OperatingLeaseVariableLeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax dei:LegalEntity, us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax

aat:AmericanAssetsTrustL.P., us-gaap:InterestRateSwap


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value475000.0747000.01201000.014000.0-6115000.0-1094000.0-3891000.0-2132000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

aat:AmericanAssetsTrustL.P., us-gaap:Swap


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value475000.0747000.01201000.014000.0-6115000.0-1094000.0-3891000.0-2132000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax dei:LegalEntity, us-gaap:DerivativeInstrumentRisk, us-gaap:PartnerCapitalComponents

aat:AmericanAssetsTrustL.P., us-gaap:Swap, us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value475000.0747000.01201000.014000.0-6115000.0-1094000.0-3891000.0-2132000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax us-gaap:DerivativeInstrumentRisk

us-gaap:InterestRateSwap


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value475000.0747000.01201000.014000.0-6115000.0-1094000.0-3891000.0-2132000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Swap


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value475000.0747000.01201000.014000.0-6115000.0-1094000.0-3891000.0-2132000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents

us-gaap:Swap, us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value374000.0579000.0940000.010000.0-4816000.0-841000.0-2857000.0-1561000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax78.777.578.371.478.876.973.473.2

us-gaap:Swap, us-gaap:NoncontrollingInterest


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value101000.0168000.0261000.04000.0-1299000.0-253000.0-1034000.0-571000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax21.322.521.728.621.223.126.626.8

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value275000.0332000.0332000.0333000.0333000.0319000.0320000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Other
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value275000.0332000.0332000.0333000.0333000.0319000.0320000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax dei:LegalEntity, us-gaap:DebtInstrument

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesA


Other
Period End2021-03-31
Value193000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax70.2

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:IncomeStatementLocation

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesA, aat:EarlyExtinguishmentOfDebt


Other
Period End2021-06-302021-03-31
Value0193000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.070.2

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:PartnerCapitalComponents

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesA, us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-03-31
Value193000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax70.2

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax dei:LegalEntity, us-gaap:IncomeStatementLocation

aat:AmericanAssetsTrustL.P., us-gaap:InterestExpense


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value275000.0275000.0332000.0333000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax dei:LegalEntity, us-gaap:PartnerCapitalComponents

aat:AmericanAssetsTrustL.P., us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value275000.0275000.0332000.0332000.0333000.0333000.0319000.0320000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:DebtInstrument

aat:SeniorGuaranteedNotesSeriesA


Other
Period End2021-03-31
Value193000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax70.2

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:DebtInstrument, us-gaap:IncomeStatementLocation

aat:SeniorGuaranteedNotesSeriesA, aat:EarlyExtinguishmentOfDebt


Other
Period End2021-06-302021-03-31
Value0193000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.070.2

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:DebtInstrument, us-gaap:StatementEquityComponents

aat:SeniorGuaranteedNotesSeriesA, us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-03-31
Value152000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax55.3

aat:SeniorGuaranteedNotesSeriesA, us-gaap:NoncontrollingInterest


Other
Period End2021-03-31
Value41000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax14.9

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:IncomeStatementLocation

us-gaap:InterestExpense


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value275000.0275000.0332000.0333000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value216000.0216000.0261000.0261000.0261000.0261000.0240000.0234000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.078.578.678.678.478.475.273.1

us-gaap:NoncontrollingInterest


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value59000.059000.071000.071000.072000.072000.079000.086000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax0.021.521.421.421.621.624.826.9

us-gaap:OtherCostOfOperatingRevenue

us-gaap:OtherCostOfOperatingRevenue


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.1342.7242.7983.1531.9935.7475.9496.5646.0365.9735.7016.3025.9956.0325.7246.233
Percentage of OtherCostOfOperatingRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2576000.0-32000.0-2513000.0375000.0-737000.03570000.0-4769000.0-2108000.01058000.0-678000.0-379000.01491000.0536000.0-2031000.0764000.0-1183000.0314000.0-796000.01937000.0-1996000.0-575000.01403000.0-1952000.0805000.0449000.0-180000.0-744000.0471000.06000.0362000.0-258000.0-1285000.0-721000.01256000.0-1424000.0-253000.0-329000.0-416000.0-1083000.0-2521000.01870000.0-935000.0-297000.0-751000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2576000.0-32000.0-2513000.0375000.0-737000.03570000.0-4769000.0-2108000.01058000.0-678000.0-379000.01491000.0536000.0-2031000.0764000.0-1183000.0314000.0-796000.01937000.0-1996000.0-575000.01403000.0-1952000.0805000.0449000.0-180000.0-744000.0471000.06000.0362000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNonoperatingExpense

us-gaap:OtherNonoperatingExpense


Other
Period End2020-09-30
Value551000.0
Percentage of OtherNonoperatingExpense100.0

us-gaap:OtherOperatingIncome

us-gaap:OtherOperatingIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.172.8563.0943.6152.8794.6734.7165.2154.4578.4884.244.4288.1314.5314.0434.204
Percentage of OtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncome dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4.172.8563.0943.6152.8794.6734.7165.2154.4578.4884.244.4288.1314.5314.0434.204
Percentage of OtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountDistributions dei:LegalEntity

us-gaap:PartnersCapitalAccountDistributions

aat:AmericanAssetsTrustL.P.


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value212119152221181818171717171616161615151515141414
Percentage of PartnersCapitalAccountDistributions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountDistributions dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

aat:AmericanAssetsTrustL.P., us-gaap:GeneralPartner


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value161615121816131313121212121212121111111111101010
Percentage of PartnersCapitalAccountDistributions78.978.978.878.678.678.574.973.473.473.373.373.373.373.373.372.271.971.871.771.771.771.771.471.0

aat:AmericanAssetsTrustL.P., us-gaap:LimitedPartner


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4.5314.5314.0453.2784.9174.5894.5894.814.814.6384.6424.6434.6434.474.4714.6514.6514.4724.4754.4754.4754.1624.1614.162
Percentage of PartnersCapitalAccountDistributions21.121.121.221.421.421.525.126.626.626.726.726.726.726.726.727.828.128.228.328.328.328.328.629.0

us-gaap:PartnersCapitalAccountExchangesAndConversions dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PartnersCapitalAccountExchangesAndConversions

aat:AmericanAssetsTrustL.P., us-gaap:GeneralPartner


Partners
Period End2020-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312015-12-312015-09-302015-06-302015-03-31
Value-12.001120.00.0-0.9160.00.00.00.00.00.00.067
Percentage of PartnersCapitalAccountExchangesAndConversions100.0100.00.00.0100.00.00.00.00.00.00.0100.0

us-gaap:PartnersCapitalAccountExchangesAndConversions dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

aat:AmericanAssetsTrustL.P., us-gaap:LimitedPartner, us-gaap:CommonStock


Partners
Period End2020-09-302019-06-302018-06-30
Value12-12.9870.916
Percentage of PartnersCapitalAccountExchangesAndConversions-100.0-100.0-100.0

us-gaap:PartnersCapitalAccountUnitBasedCompensation dei:LegalEntity

us-gaap:PartnersCapitalAccountUnitBasedCompensation

aat:AmericanAssetsTrustL.P.


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1484000.01484000.01251000.01252000.01250000.01130000.01131000.01098000.0859000.0726000.0727000.0727000.02818000.0639000.0639000.0639000.0559000.0600000.0637000.0618000.0740000.0413000.0834000.0890000.0
Percentage of PartnersCapitalAccountUnitBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountUnitBasedCompensation dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

aat:AmericanAssetsTrustL.P., us-gaap:GeneralPartner


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1484000.01484000.01251000.01252000.01250000.01130000.01131000.01098000.0859000.0726000.0727000.0727000.02818000.0639000.0639000.0639000.0559000.0600000.0637000.0618000.0740000.0413000.0834000.0890000.0
Percentage of PartnersCapitalAccountUnitBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForCapitalImprovements

us-gaap:PaymentsForCapitalImprovements


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value24111413142022172620221110101214127.2531413141719254544493330302212119.9028.803136.16.0015.0853.0571.8520.9620.7671.004
Percentage of PaymentsForCapitalImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForCapitalImprovements dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value24111413142022172620221110101214127.253141314171925454449333030
Percentage of PaymentsForCapitalImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value50000.05025000.00012000.0667000.09000.0415000.040000.031000.002656000.0-156000.0276000.0469000.01812000.0-52000.0164000.0440000.01503000.0607000.0321000.01913000.040000.0184000.0001957000.00000423000.08000.00924000.000454000.02507000.071000.00
Percentage of PaymentsOfDebtIssuanceCosts100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.00.0100.0100.00.0100.00.00.0100.0100.0100.00.0

us-gaap:PaymentsOfDebtIssuanceCosts dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Payments
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value50000.05025000.00012000.0667000.09000.0415000.040000.031000.002656000.0-156000.0276000.0469000.01812000.0-52000.0164000.0440000.01503000.0607000.0321000.01913000.040000.0184000.0001957000.0
Percentage of PaymentsOfDebtIssuanceCosts100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts dei:LegalEntity, us-gaap:DebtInstrument

us-gaap:ProceedsFromDebtNetOfIssuanceCosts

aat:AmericanAssetsTrustL.P., aat:A3375SeniorUnsecuredNotes


Proceeds
Period End2021-01-26
Value489
Percentage of ProceedsFromDebtNetOfIssuanceCosts100.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Proceeds
Period End2021-01-26
Value489
Percentage of ProceedsFromDebtNetOfIssuanceCosts100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-142019-06-302019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value0.00.0-0.1191.42104724957.0340.0-0.2020.00.030-0.0259.6650.00.0-0.054184310-0.0413422460.558-0.132240.00.00.00.0
Percentage of ProceedsFromIssuanceOfCommonStock0.00.0100.0100.0100.0100.0100.0100.00.0100.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


Proceeds
Period End2021-06-302021-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.04940.00.00.00.00.00.01001002500.00.00.00.00.00.01001001500.00.00.0
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0100.00.00.00.00.00.00.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.00.00.00.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Proceeds
Period End2021-06-302021-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.04940.00.00.00.00.00.01001002500.00.00.00.00.00.01001001500.00.00.0
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0100.00.00.00.00.00.00.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.00.00.00.0

us-gaap:ProceedsFromUnsecuredLinesOfCredit

us-gaap:ProceedsFromUnsecuredLinesOfCredit


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value0.00.01000.00.00.03524490.00.0350.0431300.0240.00.010.05.05.03520-100.00.00.0100930.00.00.00.0164
Percentage of ProceedsFromUnsecuredLinesOfCredit0.00.0100.00.00.00.0100.0100.0100.00.00.0100.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.0100.0100.00.00.00.00.0100.0

us-gaap:ProceedsFromUnsecuredLinesOfCredit dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.01000.00.00.03524490.00.0350.0431300.0240.00.010.05.05.035200.00.00.00.0
Percentage of ProceedsFromUnsecuredLinesOfCredit0.00.0100.00.00.00.0100.0100.0100.00.00.0100.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.0100.0-0.00.00.00.0

us-gaap:ProvisionForLeaseLosses

us-gaap:ProvisionForLeaseLosses


Provision
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value-2.4373.2136.9543.4790.370.413
Percentage of ProvisionForLeaseLosses100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLeaseLosses dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-2.4373.2137.6246.9543.4790.370.8180.413
Percentage of ProvisionForLeaseLosses100.0100.00.0100.0100.0100.00.0100.0

us-gaap:RealEstateTaxExpense

us-gaap:RealEstateTaxExpense


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value101110118.9611110109.2759.0469.0128.7878.6288.5468.6968.5357.9047.5367.9327.3966.4176.6336.1096.6765.9866.0485.915.8995.1296.0265.3345.7685.4764.84.3366.3015.9445.4444.7555.395.6173.9583.283.4422.992
Percentage of RealEstateTaxExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateTaxExpense dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value101110118.9611110109.2759.0469.0128.7878.6288.5468.6968.5357.9047.5367.9327.3966.4176.6336.1096.6765.9866.0485.915.8995.1296.026
Percentage of RealEstateTaxExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:CounterpartyName, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

aat:AAIAviationInc., srt:BoardOfDirectorsChairman


Related
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0000000200000.0100000.00
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty0.00.00.00.00.00.00.0100.0100.00.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-06-302021-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.01000.0957.00.0130.00.043130204.00.020200.010.0250.00.00.00.093
Percentage of RepaymentsOfLinesOfCredit0.0100.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.00.0100.0100.00.0100.0100.00.00.00.00.0100.0

us-gaap:RepaymentsOfLinesOfCredit dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Repayments
Period End2021-06-302021-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.01000.0957.00.0130.00.043130204.00.020200.010.0250.00.00.00.093
Percentage of RepaymentsOfLinesOfCredit0.0100.00.0100.0100.00.0100.00.00.0100.0100.0100.0100.00.0100.0100.00.0100.0100.00.00.00.00.0100.0

us-gaap:RepaymentsOfLinesOfCredit dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType

aat:AmericanAssetsTrustL.P., aat:SecondAmendedandRestatedCreditFacility, us-gaap:LineOfCredit, us-gaap:SubsequentEvent


Repayments
Period End2021-01-26
Value100
Percentage of RepaymentsOfLinesOfCredit0.0

us-gaap:RepaymentsOfSecuredDebt

us-gaap:RepaymentsOfSecuredDebt


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.00.00.0510.2940.2810.27819220.3670.36740.3580.34235130230.43928840.4340.4121331011410.3850.3790.405920.910.8960.943311.1971.1541.1611.1441.1031.0872602.2261.594
Percentage of RepaymentsOfSecuredDebt0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfSecuredDebt dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.00.00.0510.2940.2810.27819220.3670.36740.3580.34235130230.43928840.4340.4121331011410.3850.3790.405
Percentage of RepaymentsOfSecuredDebt0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfUnsecuredDebt

us-gaap:RepaymentsOfUnsecuredDebt


Repayments
Period End2021-06-302021-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-302010-12-312010-09-30
Value0.01550.00.0930.00.00.00.0-23.00.00.06.5632.106
Percentage of RepaymentsOfUnsecuredDebt0.0100.00.00.0100.00.00.00.00.0100.00.00.0100.0100.0

us-gaap:RepaymentsOfUnsecuredDebt dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Repayments
Period End2021-06-302021-03-31
Value0.0155
Percentage of RepaymentsOfUnsecuredDebt0.0100.0

us-gaap:RestrictedStockExpense

us-gaap:RestrictedStockExpense


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value1500000.01500000.02500000.01300000.01300000.01300000.01100000.01100000.01100000.01100000.0800000.0700000.0700000.0700000.02800000.0600000.0600000.0600000.0500000.0600000.0600000.0600000.0800000.0400000.0800000.0900000.01100000.01100000.01000000.0500000.0700000.0700000.0700000.0700000.0800000.0700000.0700000.0700000.0700000.0700000.0
Percentage of RestrictedStockExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.05.1330.0220.00.00.07.661
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability0.0100.00.0100.00.00.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value-0.0523.24-2.09
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-31
Value-13.09
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-31
Value-16.89
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:RestrictedStock


Sharebased
Period End2020-12-042019-12-092018-12-062017-12-152016-12-012015-12-012014-12-012014-03-252013-07-132012-07-10
Value33.30.3330.3330.3330.3330.3330.3330.3330.3330.333
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueConversionOfUnits us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueConversionOfUnits

us-gaap:AccumulatedOtherComprehensiveIncome


Stock
Period End2020-09-302019-06-30
Value0.0030.148
Percentage of StockIssuedDuringPeriodValueConversionOfUnits100.0100.0

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-30
Value-12.003120.00.0-0.9160.00.00.00.00.00.00.0670.00.00.0-0.133-0.4760.1566.440.616
Percentage of StockIssuedDuringPeriodValueConversionOfUnits-400100.08769.60.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stock
Period End2020-09-302019-06-302018-12-312018-09-302017-12-312017-09-302013-12-312013-09-30
Value0.0020.0080.00.00.00.00.00.0
Percentage of StockIssuedDuringPeriodValueConversionOfUnits66.75.40.00.00.00.00.00.0

us-gaap:NoncontrollingInterest


Stock
Period End2020-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-302016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value11-13.1350.00.00.9160.00.00.00.00.00.0-0.0670.00.00.00.1330.475-0.155
Percentage of StockIssuedDuringPeriodValueConversionOfUnits399933.3-8875.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StraightLineRent

us-gaap:StraightLineRent


Straight
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1.95.51.66.08.52.82.35.2-4.50.20.01.2-2.8-0.8-0.50.0-0.50.2-0.5-0.30.00.10.70.90.50.7-0.50.80.61.00.80.60.50.71.02.22.01.81.51.91.2
Percentage of StraightLineRent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value938000.01194000.01174000.01182000.01073000.0868000.0865000.0975000.0633000.0625000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:DeferredRentCredits

aat:DeferredRentCredits


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value161718191816
Percentage of DeferredRentCredits100.0100.0100.0100.0100.0100.0

aat:DeferredRentExpenseAndLeaseIntangible

aat:DeferredRentExpenseAndLeaseIntangible


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value9000.013000.016000.019000.022000.025000.028000.031000.037000.01424000.02210000.02284000.02017000.02248000.01670000.01716000.01765000.01797000.01756000.01622000.01102000.0468000.0434000.0436000.0523000.0511000.0584000.0651000.0718000.0773000.0829000.0879000.0930000.0969000.01008000.01042000.01075000.01122000.0
Percentage of DeferredRentExpenseAndLeaseIntangible100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:LeaseIncentiveAccumulatedAmortization

aat:LeaseIncentiveAccumulatedAmortization


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value896000.0862000.0802000.0771000.0710000.0623000.0565000.0464000.0431000.0385000.0299000.0253000.0208000.0171000.0136000.0100000.073000.055000.041000.03635000.03537000.03439000.03341000.03244000.03146000.03053000.02960000.02868000.02775000.02683000.02590000.02498000.02405000.02313000.02220000.01850000.0
Percentage of LeaseIncentiveAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

aat:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour


Lessee
Period End2021-06-302021-03-312020-09-30
Value191923
Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour100.0100.0100.0

aat:LessorOperatingLeasePaymentToBeReceivedAfterYearFour

aat:LessorOperatingLeasePaymentToBeReceivedAfterYearFour


Lessor
Period End2021-06-302021-03-312020-09-30
Value463443571
Percentage of LessorOperatingLeasePaymentToBeReceivedAfterYearFour100.0100.0100.0

aat:StatedFutureMonthlyLeaseRate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementScenario

aat:StatedFutureMonthlyLeaseRate

aat:LandMarkAtOneMarket, us-gaap:ScenarioForecast


Stated
Period End2021-06-302016-06-30
Value217740.0162140.0
Percentage of StatedFutureMonthlyLeaseRate100.0100.0

aat:TransferTaxesLiability

aat:TransferTaxesLiability


Transfer
Period End2020-12-31
Value6600000.0
Percentage of TransferTaxesLiability100.0

dei:EntityNumberOfEmployees

dei:EntityNumberOfEmployees


Entity
Period End2021-06-302021-03-312020-12-312020-09-30
Value199.0190.0189.0199.0
Percentage of EntityNumberOfEmployees100.0100.0100.0100.0

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances


Real
Period End2020-12-312019-12-312018-12-31
Value111162182
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances100.0100.0100.0

srt:RealEstateFederalIncomeTaxBasis

srt:RealEstateFederalIncomeTaxBasis


Real
Period End2020-12-31
Value2300
Percentage of RealEstateFederalIncomeTaxBasis100.0

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value807159716567626354534654394338484039324233373150455550533840374131352933272525272011
Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value80715971656762635453465439433848403932423337315045555037
Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNet

us-gaap:AccountsReceivableNet


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value6.5826.0316.93812138.621129.561109.1379.2898.3457.1188.7979.8698.6496.4837.5589.338.6046.7477.5867.5188.1515.7215.7726.7277.5524.946.2777.2957.5797.3387.4796.446.0764.9975.3136.8476.5254.9441.573
Percentage of AccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNet dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value6.5826.0316.93812138.621129.561109.1379.2898.3457.1188.7979.8698.6496.4837.5589.338.6046.7477.5867.5188.1515.7215.7726.7277.295
Percentage of AccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedAmortizationDeferredFinanceCosts

us-gaap:AccumulatedAmortizationDeferredFinanceCosts


Accumulated
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302018-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1425000.01324000.000916000.0814000.0713000.004648000.04322000.03996000.04416000.04147000.03847000.03559000.03272000.02985000.03139000.02884000.02629000.02374000.02476000.02220000.02509000.0
Percentage of AccumulatedAmortizationDeferredFinanceCosts100.0100.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedAmortizationDeferredFinanceCosts dei:LegalEntity, us-gaap:LongtermDebtType

aat:AmericanAssetsTrustL.P., us-gaap:SecuredDebt


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value366000.0355000.0345000.0334000.0323000.0313000.0449000.0435000.0420000.0406000.0671000.0857000.0828000.0798000.01191000.01150000.01110000.01069000.01029000.01209000.01163000.01291000.01649000.0
Percentage of AccumulatedAmortizationDeferredFinanceCosts25.726.80.00.00.034.255.261.00.00.00.00.00.00.00.00.00.00.00.00.00.00.035.5

aat:AmericanAssetsTrustL.P., us-gaap:UnsecuredDebt


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value9059000.09463000.08856000.08601000.08346000.08090000.07835000.07579000.07324000.07084000.06844000.06616000.06387000.06159000.05866000.05473000.05068000.04675000.04317000.03975000.03632000.03300000.02999000.0
Percentage of AccumulatedAmortizationDeferredFinanceCosts635.7714.70.00.00.0883.2962.51063.00.00.00.00.00.00.00.00.00.00.00.00.00.00.064.5

us-gaap:AccumulatedAmortizationDeferredFinanceCosts us-gaap:LongtermDebtType

us-gaap:UnsecuredDebt


Accumulated
Period End2020-12-312019-12-31
Value345000.0449000.0
Percentage of AccumulatedAmortizationDeferredFinanceCosts0.055.2

us-gaap:AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables

us-gaap:AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value8.31210.010.04.91.7
Percentage of AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value10000000.01200000.0600000.0400000.0400000.0500000.0800000.01000000.01200000.01100000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AreaOfRealEstateProperty dei:LegalEntity, us-gaap:MortgageLoansOnRealEstateDescriptionTypeOfProperty, us-gaap:SubsequentEventType

us-gaap:AreaOfRealEstateProperty

aat:AmericanAssetsTrustL.P., aat:EastgateOfficePark, us-gaap:SubsequentEvent


Area
Period End2021-07-07
Value280000.0
Percentage of AreaOfRealEstateProperty100.0

us-gaap:BelowMarketLeaseAccumulatedAmortization

us-gaap:BelowMarketLeaseAccumulatedAmortization


Below
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value363535343737363537383737383837363534333233313029292827253129282725
Percentage of BelowMarketLeaseAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BelowMarketLeaseAmortizationIncomeAfterYearFive

us-gaap:BelowMarketLeaseAmortizationIncomeAfterYearFive


Below
Period End2020-12-31
Value10
Percentage of BelowMarketLeaseAmortizationIncomeAfterYearFive100.0

us-gaap:BelowMarketLeaseAmortizationIncomeNextTwelveMonths

us-gaap:BelowMarketLeaseAmortizationIncomeNextTwelveMonths


Below
Period End2020-12-31
Value3035000.0
Percentage of BelowMarketLeaseAmortizationIncomeNextTwelveMonths100.0

us-gaap:BelowMarketLeaseAmortizationIncomeYearFive

us-gaap:BelowMarketLeaseAmortizationIncomeYearFive


Below
Period End2020-12-31
Value1564000.0
Percentage of BelowMarketLeaseAmortizationIncomeYearFive100.0

us-gaap:BelowMarketLeaseAmortizationIncomeYearFour

us-gaap:BelowMarketLeaseAmortizationIncomeYearFour


Below
Period End2020-12-31
Value1932000.0
Percentage of BelowMarketLeaseAmortizationIncomeYearFour100.0

us-gaap:BelowMarketLeaseAmortizationIncomeYearThree

us-gaap:BelowMarketLeaseAmortizationIncomeYearThree


Below
Period End2020-12-31
Value2232000.0
Percentage of BelowMarketLeaseAmortizationIncomeYearThree100.0

us-gaap:BelowMarketLeaseAmortizationIncomeYearTwo

us-gaap:BelowMarketLeaseAmortizationIncomeYearTwo


Below
Period End2020-12-31
Value2467000.0
Percentage of BelowMarketLeaseAmortizationIncomeYearTwo100.0

us-gaap:BelowMarketLeaseGross

us-gaap:BelowMarketLeaseGross


Below
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value565656566162626265636365676767676666666768686868707070707676767680
Percentage of BelowMarketLeaseGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BelowMarketLeaseNet

us-gaap:BelowMarketLeaseNet


Below
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value192021222324252627242527282930313132333435363839404142444546474954
Percentage of BelowMarketLeaseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BuildingsAndImprovementsGross us-gaap:InvestmentType

us-gaap:BuildingsAndImprovementsGross

us-gaap:RealEstateInvestment


Buildings
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value218421731775176315561501
Percentage of BuildingsAndImprovementsGross100.0100.0100.0100.0100.0100.0

us-gaap:BuildingsAndImprovementsGross us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:RealEstateInvestment, aat:MixedUseSegment


Buildings
Period End2020-12-312019-12-31
Value128126
Percentage of BuildingsAndImprovementsGross5.95.8

us-gaap:RealEstateInvestment, aat:MultifamilySegment


Buildings
Period End2020-12-312019-12-31
Value392390
Percentage of BuildingsAndImprovementsGross18.018.0

us-gaap:RealEstateInvestment, aat:OfficeSegment


Buildings
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value11371132743705697665
Percentage of BuildingsAndImprovementsGross52.152.141.940.044.844.3

us-gaap:RealEstateInvestment, aat:RetailSegment


Buildings
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value526523516548522500
Percentage of BuildingsAndImprovementsGross24.124.129.131.133.533.3

us-gaap:CashUninsuredAmount

us-gaap:CashUninsuredAmount


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value33364245373232293324
Percentage of CashUninsuredAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashUninsuredAmount us-gaap:InvestmentType

us-gaap:MoneyMarketFunds


Cash
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value97520.2290.20.120110.982
Percentage of CashUninsuredAmount296.4145.00.564.30.50.361.737.92.7337.9

us-gaap:DebtInstrumentCarryingAmount dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCarryingAmount

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesD, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value2502502502502502502502502502502502502502502502502502500.0
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesE, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value1001001001001001001001001001001001001001001001001000.0
Percentage of DebtInstrumentCarryingAmount40.040.040.040.040.040.040.040.040.040.040.040.040.040.040.040.040.00.0

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesF, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-31
Value1001001001001001001001001001001001001001001001000.0
Percentage of DebtInstrumentCarryingAmount40.040.040.040.040.040.040.040.040.040.040.040.040.040.040.040.00.0

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesG, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1501501501501501501501500.0
Percentage of DebtInstrumentCarryingAmount60.060.060.060.060.060.060.060.00.0

aat:AmericanAssetsTrustL.P., aat:TermLoanB, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1001001001001001001001001001001001001001001001001001001001001001000.0
Percentage of DebtInstrumentCarryingAmount40.040.040.040.040.040.040.040.040.040.040.040.040.040.040.040.040.040.00.00.00.00.00.0

aat:AmericanAssetsTrustL.P., aat:TermLoanC, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value5050505050505050505050505050505050505050500.0
Percentage of DebtInstrumentCarryingAmount20.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.020.00.00.00.00.0

us-gaap:DebtInstrumentCarryingAmount dei:LegalEntity, us-gaap:LongtermDebtType

aat:AmericanAssetsTrustL.P., us-gaap:SecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value111111111111111111162162162162182205205205279280280316447470470499584819962
Percentage of DebtInstrumentCarryingAmount44.444.444.444.444.444.464.864.965.065.173.182.082.282.3112.0112.1112.2126.50.00.00.00.00.00.00.0

aat:AmericanAssetsTrustL.P., us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value1550155012001200120012001200120010501050105010501050105010501050950850600600600550450
Percentage of DebtInstrumentCarryingAmount620.0620.0480.0480.0480.0480.0480.0480.0420.0420.0420.0420.0420.0420.0420.0420.0380.0340.00.00.00.00.00.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk

us-gaap:DebtInstrumentInterestRateEffectivePercentage

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesA, us-gaap:ForwardContracts


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value3.883.883.883.880.03880.03880.03880.03880.03880.03880.03880.03880.03880.03880.03880.0388
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesD, us-gaap:ForwardContracts


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3.873.873.873.870.03870.03870.03870.03870.03870.03870.03870.03870.03870.03870.03870.03870.03870.0387
Percentage of DebtInstrumentInterestRateEffectivePercentage99.799.799.799.799.799.799.799.799.799.70.099.799.799.70.099.799.799.7

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesE, us-gaap:ForwardContracts


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value4.184.184.184.180.04180.04180.04180.04180.04180.04180.04180.04180.04180.04180.04180.04180.0418
Percentage of DebtInstrumentInterestRateEffectivePercentage107.7107.7107.7107.7107.7107.7107.7107.7107.7107.70.0107.7107.7107.70.0107.7107.7

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesF, us-gaap:ForwardContracts


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3.853.853.853.850.03850.03850.03850.03850.03850.03850.03850.03850.03850.03850.03850.0385
Percentage of DebtInstrumentInterestRateEffectivePercentage99.299.299.299.299.299.299.299.299.299.20.099.299.299.20.099.2

aat:AmericanAssetsTrustL.P., aat:SeniorGuaranteedNotesSeriesG, us-gaap:ForwardContracts


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3.883.883.883.880.03880.03880.03880.0388
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet

aat:AmericanAssetsTrustL.P., aat:SecondAmendedandRestatedCreditFacility, us-gaap:LineOfCredit


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value600000.0700000.0800000.01000000.0
Percentage of DebtIssuanceCostsLineOfCreditArrangementsNet100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2269000.02158000.02059000.01919000.01835000.01726000.01669000.01573000.01494000.01438000.01424000.01350000.01287000.01224000.01156000.01158000.01109000.01065000.01006000.0962000.0921000.0956000.0929000.0883000.01090000.01042000.0981000.0897000.0865000.0821000.0769000.0729000.0689000.0660000.0637000.0604000.0571000.0520000.0
Percentage of DeferredCompensationLiabilityCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCostsLeasingAccumulatedAmortization

us-gaap:DeferredCostsLeasingAccumulatedAmortization


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value3836353333323029292928272929282726262524252423222221202021201918181716171614
Percentage of DeferredCostsLeasingAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCostsLeasingNet

us-gaap:DeferredCostsLeasingNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value363738394142424142282822212120211818181818181819191919171717181717181816
Percentage of DeferredCostsLeasingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCreditsAndOtherLiabilities

us-gaap:DeferredCreditsAndOtherLiabilities


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value838891939092686162554947494846474647486263535152535555555758585959606261545555575639
Percentage of DeferredCreditsAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCreditsAndOtherLiabilities dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value83889193909268616255494749484647464748626353515253555558
Percentage of DeferredCreditsAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302018-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value0.6450.7460.01.1541.2561.3570.04.134.4514.7775.0835.3613.7274.0154.3022.6322.8873.1423.3963.6513.28
Percentage of DeferredFinanceCostsNet100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet dei:LegalEntity, us-gaap:LongtermDebtType

aat:AmericanAssetsTrustL.P., us-gaap:SecuredDebt


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value0.0560.0660.0770.0870.0980.1080.1240.1390.1530.1680.1930.2290.2580.2870.3390.380.420.4610.5010.5490.5960.6490.743
Percentage of DeferredFinanceCostsNet8.78.80.00.00.09.49.910.20.00.00.00.00.00.00.00.00.00.00.00.00.00.018.0

aat:AmericanAssetsTrustL.P., us-gaap:UnsecuredDebt


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value12133.3233.4533.7093.9644.224.4754.0514.2914.1374.3654.5944.8224.535.0665.1845.2483.653.9924.2254.1173.387
Percentage of DeferredFinanceCostsNet1967.91757.40.00.00.0343.5336.0329.80.00.00.00.00.00.00.00.00.00.00.00.00.00.082.0

us-gaap:DeferredRentCredit

us-gaap:DeferredRentCredit


Deferred
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value18181613137.9297.3937.7937.945.1884.4283.3093.013.0143.0282.7942.5052.2742.3192.3292.3442.412.5332.2630.9311.021.1450.5280.2490.110.0630.1240.2320.433
Percentage of DeferredRentCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRentReceivablesNet

us-gaap:DeferredRentReceivablesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value777672686356524742403940393938383738383838383837373635343333323130302929272523222120
Percentage of DeferredRentReceivablesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRentReceivablesNet dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value77767268635652474240394039393838373838383838383737363532
Percentage of DeferredRentReceivablesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenue

us-gaap:DeferredRevenue


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value12141411131316111011118.2189.545108.4299.458.1888.5877.728.7427.2866.9988.2036.4197.1897.5387.2886.9947.9158.2097.5067.2725.9725.2796.3834.5384.8525.008
Percentage of DeferredRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFixedInterestRate dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeFixedInterestRate

aat:AmericanAssetsTrustL.P., aat:TermLoanA, us-gaap:InterestRateSwap


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value4.134.134.134.080.04080.04130.04130.04130.04130.04130.04130.03080.03080.03080.03080.03080.03080.03080.03080.0308
Percentage of DerivativeFixedInterestRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

aat:AmericanAssetsTrustL.P., aat:TermLoanB, us-gaap:InterestRateSwap


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2.652.752.752.650.02650.02650.02750.02750.02750.02750.03150.02750.02750.02750.03150.03150.03150.03150.03150.03150.03150.0315
Percentage of DerivativeFixedInterestRate64.266.666.665.065.064.266.666.666.666.676.389.389.389.30.0102.3102.3102.30.0102.3102.3102.3

aat:AmericanAssetsTrustL.P., aat:TermLoanC, us-gaap:InterestRateSwap


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value2.642.742.742.640.02640.02640.02740.02740.02740.02740.03140.02740.02740.02740.03140.03140.03140.03140.03140.03140.0314
Percentage of DerivativeFixedInterestRate63.966.366.364.764.763.966.366.366.366.376.089.089.089.00.0101.9101.9101.90.0101.9101.9

us-gaap:DerivativeFixedInterestRate dei:LegalEntity, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

aat:AmericanAssetsTrustL.P., us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-04-072016-03-292016-03-232016-01-292015-12-31
Value4.130.03080.03080.03080.03080.017480.01880.014410.0144850.0308
Percentage of DerivativeFixedInterestRate100.074.674.60.00.00.00.00.00.00.0

us-gaap:DerivativeLiabilities

us-gaap:DerivativeLiabilities


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value3.3093.7844.5316.3336.9846.9971.3171.9161.7831.0920.8010.00.00.00.010.3580.5170.6491.06713155.6541.6862.8421.9342.3911.4480.7351.5570.7460.0
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DerivativeNotionalAmount dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNotionalAmount

aat:AmericanAssetsTrustL.P., aat:WellsFargoBankN.A., us-gaap:TreasuryLock, us-gaap:Nondesignated


Derivative
Period End2020-08-11
Value200
Percentage of DerivativeNotionalAmount100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value5600000.06900000.08400000.03600000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value2425262728293132345.8266.2816.777.2317.7438.3719.0529.5098.9639.8351011121314161718192122242628313428
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross

us-gaap:FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0.1070.1140.1210.1280.1450.1610.1830.2140.2490.3760.5180.670.7920.9561.1781.4081.6161.8512.0882.3822.6772.9953.3373.7674.2034.6475.1035.5736.0756.6927.3998.3059.1751011484145
Percentage of FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:AboveMarketLeases


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value4.5434.6655.3895.4167.5347.5347.5347.5349.681111111521212121212121222222222222222228282828293032323342
Percentage of FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross4245.84092.14453.74231.25195.94679.54116.93520.63887.63181.62309.51785.51960.22224.11804.91510.11339.31169.31037.7914.4826.9740.0665.3589.4529.8479.7440.9404.5464.8422.3382.2341.5326.7294.2286.067.480.492.9

us-gaap:LeasesAcquiredInPlace


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value6060606163636363694040414448545454484849515252525353535462626263707172726159
Percentage of FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross56403.753023.750384.347773.443817.239538.534915.829874.827804.010873.47892.76139.45618.75067.24601.53849.93359.62631.02334.32093.21934.11739.51566.91389.41268.21148.81057.6969.41025.6937.4848.9761.5766.6690.6632.2149.2149.4131.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1.3491.2771.2131.1511.1871.1131.0310.9451.0611.0250.9810.9791.11.1121.1151.1021.1561.141.1282.032.3462.1391.9041.6481.6461.6121.591.5531.6371.61.5541.5151.8464.3164.2394.2084.1343.885
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:AboveMarketLeases


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value4.4364.5515.2685.2877.3897.3737.3517.329.4311111111420201920191919191918181817171622212020202021-20.114-18.905-25.657
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization328.8356.4434.3459.3622.5662.4713.0774.6888.91130.41166.71153.51339.41826.11801.31801.61732.41736.11735.7955.6829.4896.2990.81118.61097.41094.51094.21092.61353.91348.11343.61323.91126.7468.9504.0-478.0-457.3-660.4

us-gaap:LeasesAcquiredInPlace


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value3635343335333231343534343740454544393838393938373736353441393836414038-36.806-34.447-30.924
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization2689.62766.22865.52937.22948.83043.73169.03290.53258.73420.33527.33510.13388.13660.04110.84097.53873.93485.63449.11920.01702.21835.82018.12266.22256.22233.32222.42197.72509.02492.62463.32421.72245.1936.1903.3-874.7-833.3-796.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value9.017111.7182.2571.9322.493.3994.866.811
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value28000.062000.0339000.0631000.0932000.01248000.01752000.02296000.03727000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value4215000.04903000.01620000.02060000.03091000.03931000.04744000.05849000.08810000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths15053.67908.1477.9326.5331.7315.0270.8254.7236.4

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value15000.024000.027000.028000.024000.099000.0318000.0628000.0986000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value2918000.03178000.0539000.0637000.0558000.0909000.01452000.01897000.03368000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive19453.313241.71996.32275.02325.0918.2456.6302.1341.6

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value24000.027000.028000.028000.099000.0319000.0628000.0932000.01360000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3156000.03363000.0632000.0724000.0909000.01452000.01893000.03193000.04187000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour13150.012455.62257.12585.7918.2455.2301.4342.6307.9

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value26000.028000.028000.0103000.0319000.0628000.0932000.01263000.01885000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3341000.03589000.0719000.01075000.01452000.01893000.03189000.03958000.05085000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree12850.012817.92567.91043.7455.2301.4342.2313.4269.8

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value28000.028000.058000.0322000.0628000.0932000.01263000.01752000.02296000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value3560000.04244000.01053000.01618000.01893000.03189000.03954000.04777000.06047000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo12714.315157.11815.5502.5301.4342.2313.1272.7263.4

us-gaap:GeneralPartnersCapitalAccount dei:LegalEntity

us-gaap:GeneralPartnersCapitalAccount

aat:AmericanAssetsTrustL.P.


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value124912551269127913001303130813121303798792798800809822826828823797800793796799802781738735648
Percentage of GeneralPartnersCapitalAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncentiveToLessee

us-gaap:IncentiveToLessee


Incentive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value782000.0934000.0994000.01513000.01666000.01760000.02603000.0565000.0598000.0676000.0747000.01051000.01057000.0881000.0916000.0885000.0550000.0300000.0313000.0228000.0323000.0411000.0509000.0543000.0584000.0647000.0740000.0832000.0925000.01110000.0
Percentage of IncentiveToLessee100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value4.5311.3170.8010.011.067155.6541.6862.8421.9342.3911.4480.7351.5570.7460.0
Percentage of InterestRateDerivativeLiabilitiesAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue dei:LegalEntity, us-gaap:CounterpartyName, us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

aat:AmericanAssetsTrustL.P., aat:BankofAmericaN.A., aat:InterestRateSwap192021, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Interest
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.0850.7791.4681.9641.3171.6741.7831.0920.801
Percentage of InterestRateDerivativeLiabilitiesAtFairValue1.90.00.00.0100.00.00.00.0100.0

aat:AmericanAssetsTrustL.P., aat:U.S.BankN.A., aat:InterestRateSwap312023, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302016-09-302016-06-302016-03-31
Value2.2122.5332.9723.3443.6913.3660.182.3592.9991.365
Percentage of InterestRateDerivativeLiabilitiesAtFairValue0.00.065.60.00.00.00.00.019.324.1

aat:AmericanAssetsTrustL.P., aat:WellsFargoBankN.A., aat:InterestRateSwap312023, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-09-302016-09-302016-06-302016-03-31
Value1.0971.2511.4741.6591.8251.6670.0621.1621.4870.568
Percentage of InterestRateDerivativeLiabilitiesAtFairValue0.00.032.50.00.00.00.00.09.610.0

aat:AmericanAssetsTrustL.P., aat:WellsFargoBankN.A., aat:InterestRateSwap312023, us-gaap:CashFlowHedging, us-gaap:Nondesignated


Interest
Period End2020-09-30
Value0.551
Percentage of InterestRateDerivativeLiabilitiesAtFairValue0.0

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value3.3093.7844.5316.3336.9846.9971.3171.9161.7831.0920.8010.00.00.00.010.3580.5170.6491.067131.686
Percentage of InterestRateDerivativeLiabilitiesAtFairValue0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.0100.0

us-gaap:InterestRateDerivativeLiabilitiesAtFairValue us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value3.3093.7844.5316.3336.9846.9971.3171.9161.7831.0920.8010.00.00.00.010.3580.5170.6491.067131.686
Percentage of InterestRateDerivativeLiabilitiesAtFairValue0.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.0100.0

us-gaap:LandAvailableForDevelopment

us-gaap:LandAvailableForDevelopment


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value0.5470.5470.5470.5470.5470.5470.5470.5470.5479.3929.3929.3929.3929.3929.3929.3919.4479.4479.4479.4479.4629.4619.4639.4239.4189.4139.399.1399.0849.0289.0139.0068.964151414142524228.7568.081
Percentage of LandAvailableForDevelopment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LandAvailableForDevelopment dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value0.5470.5470.5470.5470.5470.5470.5470.5470.5479.3929.3929.3929.3929.3929.3929.3919.4479.4479.4479.4479.4629.4619.4639.4239.4189.4139.399.013
Percentage of LandAvailableForDevelopment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LandImprovements us-gaap:InvestmentType

us-gaap:LandImprovements

us-gaap:RealEstateInvestment


Land
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value696761615554
Percentage of LandImprovements100.0100.0100.0100.0100.0100.0

us-gaap:LandImprovements us-gaap:InvestmentType, us-gaap:StatementBusinessSegments

us-gaap:RealEstateInvestment, aat:MultifamilySegment


Land
Period End2020-12-312019-12-31
Value7.3467.106
Percentage of LandImprovements10.610.6

us-gaap:RealEstateInvestment, aat:OfficeSegment


Land
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value11118.8259.3138.7778.273
Percentage of LandImprovements16.916.514.315.215.915.3

us-gaap:RealEstateInvestment, aat:RetailSegment


Land
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value474643424040
Percentage of LandImprovements68.769.070.569.473.774.3

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3232000.03232000.03215000.03215000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-30
Value1061000.02350000.0865000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceived


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value1309133613661394
Percentage of LessorOperatingLeasePaymentsToBeReceived100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears


Lessor
Period End2020-12-31
Value142
Percentage of LessorOperatingLeasePaymentsToBeReceivedFiveYears100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value150147163160
Percentage of LessorOperatingLeasePaymentsToBeReceivedFourYears100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value218215222221
Percentage of LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear


Lessor
Period End2021-06-302021-03-312020-09-30
Value10516241
Percentage of LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter


Lessor
Period End2020-12-31
Value435
Percentage of LessorOperatingLeasePaymentsToBeReceivedThereafter100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value169168192190
Percentage of LessorOperatingLeasePaymentsToBeReceivedThreeYears100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value201199210208
Percentage of LessorOperatingLeasePaymentsToBeReceivedTwoYears100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure

us-gaap:LiabilitiesFairValueDisclosure


Liabilities
Period End2020-12-312019-12-312018-12-312017-12-31
Value2059000.01669000.01424000.01156000.0
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2269000.02158000.02059000.01919000.01835000.01726000.01669000.01573000.01494000.01438000.01424000.01350000.01156000.0
Percentage of LiabilitiesFairValueDisclosure0.00.0100.00.00.00.0100.00.00.00.0100.00.0100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2269000.02158000.02059000.01919000.01835000.01726000.01669000.01573000.01494000.01438000.01424000.01350000.01156000.0
Percentage of LiabilitiesFairValueDisclosure0.00.0100.00.00.00.0100.00.00.00.0100.00.0100.0

us-gaap:LimitedPartnersCapitalAccount dei:LegalEntity

us-gaap:LimitedPartnersCapitalAccount

aat:AmericanAssetsTrustL.P.


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value-25.332-23.212-19.02-15.742-25.063-23.886-22.281-20.899-19.875-5.232-4.477-2.107-1.2751.3266.1358.1849.3032224252627293029303138
Percentage of LimitedPartnersCapitalAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit

us-gaap:LineOfCredit


Line
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value9999980.00.09386622020330.00.00.00.0200.00.020302530200.00.00.00.0930.0
Percentage of LineOfCredit100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.00.00.0100.0100.0100.0100.0100.00.00.00.00.0100.00.0

us-gaap:LineOfCredit dei:LegalEntity

aat:AmericanAssetsTrustL.P.


Line
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value9999980.00.09386622020330.00.00.00.0200.00.020302530200.093
Percentage of LineOfCredit100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.00.00.0100.0100.0100.0100.0100.00.0100.0

us-gaap:LineOfCredit dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

aat:AmericanAssetsTrustL.P., aat:SecondAmendedandRestatedCreditFacility, us-gaap:LineOfCredit


Line
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1001001000.00.09588642222
Percentage of LineOfCredit100.9101.0101.10.00.0101.6101.8102.7108.7109.3

us-gaap:LongTermDebtFairValue us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, aat:SeniorUnsecuredNotes


Long
Period End2021-06-302021-03-31
Value516493
Percentage of LongTermDebtFairValue100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:LineOfCredit


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value1001001000.00.00.064
Percentage of LongTermDebtFairValue0.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value114113114114114111166168167166183205208210286287287324457491592
Percentage of LongTermDebtFairValue22.223.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value8388271017103010361036975987818802790773781786802808707599351368357
Percentage of LongTermDebtFairValue162.4167.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByMeasurementBasis, us-gaap:LongtermDebtType

us-gaap:CarryingReportedAmountFairValueDisclosure, aat:SeniorUnsecuredNotes


Long
Period End2021-06-302021-03-31
Value490489
Percentage of LongTermDebtFairValue94.999.2

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:LineOfCredit


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value9999980.00.00.09386622020330.00.00.00.0200.00.020302530200.00.00.00.0930.0
Percentage of LongTermDebtFairValue0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value1101101101101101101611621621621822042052052792792803154454674674945795795797118129539529529521044
Percentage of LongTermDebtFairValue21.522.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:SeniorNotes


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value797797947947947947946946797797797796796796796796696596348348348347350350350250150
Percentage of LongTermDebtFairValue154.5161.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:UnsecuredDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2492492492492482482482482482482482482482482482482482472472472471981001001001001001001001000.0
Percentage of LongTermDebtFairValue48.350.50.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value500
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value150
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value200
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value100
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value150
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value211
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners dei:LegalEntity, us-gaap:Ownership

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners

aat:NonAffiliatedInvestors, aat:AmericanAssetsTrustL.P.


Minority
Period End2020-12-312019-12-31
Value21.30.215
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners100.0100.0

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners us-gaap:Ownership

aat:AmericanAssetsTrustL.P.


Minority
Period End2021-06-302021-03-312020-09-30
Value21.221.321.3
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners0.00.00.0

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty

aat:InsuranceCompanyoftheWestInc, srt:BoardOfDirectorsChairman


Minority
Period End2020-12-312019-12-31
Value33.00.32
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners154.9148.8

us-gaap:MinorityInterestOwnershipPercentageByNoncontrollingOwners us-gaap:Ownership, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:StatementEquityComponents

aat:InsuranceCompanyoftheWestInc, srt:BoardOfDirectorsChairman, us-gaap:CommonStock


Minority
Period End2020-12-312019-12-31
Value13.40.126
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners62.958.6

aat:InsuranceCompanyoftheWestInc, srt:BoardOfDirectorsChairman, us-gaap:MemberUnits


Minority
Period End2020-12-312019-12-31
Value19.50.195
Percentage of MinorityInterestOwnershipPercentageByNoncontrollingOwners91.590.7

us-gaap:MinorityInterestOwnershipPercentageByParent us-gaap:Ownership

us-gaap:MinorityInterestOwnershipPercentageByParent

aat:AmericanAssetsTrustL.P.


Minority
Period End2020-12-31
Value78.8
Percentage of MinorityInterestOwnershipPercentageByParent100.0

us-gaap:NotesPayable

us-gaap:NotesPayable


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-01-19
Value1111111111111111111621621621621822052052052792802803164474704704995845845847188199619619619621054105510561057964964943342
Percentage of NotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesPayable us-gaap:StatementBusinessSegments

aat:OfficeSegment


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value111111111111111111127127127128147169170170170170170206206206207207292292292426
Percentage of NotesPayable100.0100.0100.0100.0100.0100.078.978.878.778.680.882.882.882.760.960.960.965.246.244.044.041.650.050.050.152.0

us-gaap:OffMarketLeaseUnfavorable

us-gaap:OffMarketLeaseUnfavorable


Off
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1920212223242526272425272829303131323334353638394041424445464749515254544748
Percentage of OffMarketLeaseUnfavorable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-312020-09-30
Value3.193.213.223.22
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDue

us-gaap:OperatingLeasesFutureMinimumPaymentsDue


Operating
Period End2020-12-312019-12-312018-12-312018-06-30
Value365.68.92236
Percentage of OperatingLeasesFutureMinimumPaymentsDue100.0100.0100.0100.0

us-gaap:OtherFiniteLivedIntangibleAssetsGross

us-gaap:OtherFiniteLivedIntangibleAssetsGross


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value2409000.02486000.02565000.02646000.02727000.02809000.02893000.02979000.03014000.02949000.02994000.0190000.0202000.0214000.0227000.0240000.0171000.0187000.0206000.0227000.0433000.0685000.0941000.0466000.0370000.0411000.0453000.0497000.0543000.0598000.0655000.0719000.0785000.0873000.0960000.0986000.0
Percentage of OtherFiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities

us-gaap:OtherLiabilities


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value36000.032000.039000.038000.037000.039000.060000.060000.052000.046000.040000.061000.070000.067000.063000.060000.043000.057000.047000.053000.065000.062000.060000.071000.078000.087000.088000.0108000.0115000.097000.073000.087000.052000.039000.050000.039000.043000.0108000.0
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapital dei:LegalEntity

us-gaap:PartnersCapital

aat:AmericanAssetsTrustL.P.


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-12-31
Value122712351253126512761281129312981291805802815817829844848852861838814805820828832810767766686685679
Percentage of PartnersCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapital dei:LegalEntity, us-gaap:PartnerCapitalComponents

aat:AmericanAssetsTrustL.P., us-gaap:AccumulatedOtherComprehensiveIncome


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-12-31
Value3.2163.0162.7371.8190.951.2687.7167.0157.92912141918181514141516-11.955-14.329-4.365-0.339-1.437-0.472-0.8710.130.00.00.0
Percentage of PartnersCapital0.30.20.20.10.10.10.60.50.61.51.82.32.32.21.91.71.71.82.0-1.5-1.8-0.5-0.0-0.2-0.1-0.10.00.00.00.0

us-gaap:PartnersCapital dei:LegalEntity, us-gaap:PartnerTypeOfPartnersCapitalAccount

aat:AmericanAssetsTrustL.P., us-gaap:GeneralPartner