MAA


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

Table of contents


us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EarningsPerShareBasic
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:EarningsPerShareDiluted
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:GeneralAndAdministrativeExpense
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:IncomeTaxesPaid
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:InterestExpense
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:InterestPaidNet
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetIncomeLoss
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:ConsolidatedEntities
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax
us-gaap:ConsolidatedEntities, us-gaap:StatementEquityComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:ProfitLoss
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementBusinessSegments
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:Revenues
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementBusinessSegments

us-gaap:Assets
us-gaap:ConsolidatedEntities, us-gaap:ProductOrService
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementBusinessSegments

us-gaap:Liabilities
us-gaap:ConsolidatedEntities, us-gaap:ProductOrService
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:StockholdersEquity

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:Land
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ConstructionInProgressGross
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementScenario, us-gaap:InvestmentType

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssets
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:LongTermDebt

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability
us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:DepreciationDepletionAndAmortization
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetCashProvidedByUsedInOperatingActivities
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetIncomeLoss
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ProfitLoss
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ShareBasedCompensation
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetCashProvidedByUsedInInvestingActivities
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PaymentsOfDividendsCommonStock
us-gaap:PartnerTypeOfPartnersCapitalAccount
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

maa:AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic
us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
maa:AdjustmentForLimitedPartnersCapitalAtRedemptionValue
us-gaap:ConsolidatedEntities
maa:AmortizationUnearnedCompensation
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount
maa:BasicEarningsPerUnit
us-gaap:PartnerTypeOfPartnersCapitalAccount
maa:DilutedEarningsPerUnit
us-gaap:ConsolidatedEntities
maa:Distributions
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:ConsolidatedEntities
maa:EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:GainLossOnSaleOfNonDepreciableRealEstateAssets
us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:GainonSaleofNonDepreciableAssets
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
maa:GeneralPartnershipUnitsIssuedInExchangeForLimitedPartnershipUnits
us-gaap:PartnerTypeOfPartnersCapitalAccount
maa:IncomeFromContinuingOperationsAllocatedToUnvestedRestrictedShares

maa:IncomeLossFromContinuingOperationsAllocatedToUnvestedRestrictedShares

maa:IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments
us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:IncomefromContinuingOperationsAttributabletoNoncontrollingInterest

maa:IncomefromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterest
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
maa:NetIncomeAttributabletoNoncontrollingInterest
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
maa:NetIncomeAttributabletoParent
us-gaap:ConsolidatedEntities
maa:NetIncomeAvailableForCommonUnitholders
us-gaap:PartnerTypeOfPartnersCapitalAccount
maa:NetIncomeIncludingPortionAttributabletoNoncontrollingInterest
us-gaap:SubsidiarySaleOfStock
maa:NumberOfSharesRemainingForIssuance

maa:OperatingCostsAndExpensesExcludingDepreciationAndAmortization
us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:OperatingIncomeBeforeDepreciation
us-gaap:StatementBusinessSegments

maa:PaymentsToAcquireRealEstateAndOtherAssets
us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:PercentageOfReimbursableRevenueFromLeasingOfApartmentHomes

maa:PercentageOfRentalRevenueAndOtherIncomeFromLeasingOfApartmentHomes

maa:PercentageofRentalRevenueandOtherIncomeFromNonleasingActivities
us-gaap:PartnerTypeOfPartnersCapitalAccount
maa:PreferredUnitDividendsIncomeStatementImpact

maa:PropertyOperatingExpenses
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:ConsolidatedEntities
maa:UnitsIssuedDuringPeriodValueNewIssuesNet
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:ConsolidatedEntities
maa:UnitsIssuedDuringPeriodValueUnitOptionsExercised
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:ConsolidatedEntities
maa:UnitsRepurchasedAndRetiredDuringPeriodValue
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

us-gaap:AmortizationOfDebtDiscountPremium
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:ConstructionInProgressExpendituresIncurredButNotYetPaid
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ConversionOfStockAmountConverted1
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentBasisSpreadOnVariableRate1
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRedemptionPricePercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DepreciationAndAmortization
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred
us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:DividendsCommonStock
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStockCash
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:GainLossOnDispositionOfAssets
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:GainLossOnSaleOfPropertyPlantEquipment
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:IncomeLossFromEquityMethodInvestments
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:InterestCostsCapitalized
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:InvestmentCompanyInvestmentIncomeLossPerShare
us-gaap:Ownership
us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
us-gaap:ConsolidatedEntities
us-gaap:MinorityInterestPeriodIncreaseDecrease
us-gaap:ConsolidatedEntities, us-gaap:StatementEquityComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:NetIncomeLossAllocatedToGeneralPartners
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:NetIncomeLossAllocatedToLimitedPartners

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:OtherCostAndExpenseOperating
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:OtherOperatingActivitiesCashFlowStatement
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementBusinessSegments
us-gaap:OtherOperatingIncome
us-gaap:StatementBusinessSegments
us-gaap:OtherOperatingIncomeExpenseNet
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PartnersCapitalAccountContributions
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

us-gaap:PaymentsForCapitalImprovements
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsOfFinancingCosts
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PaymentsToAcquireEquityMethodInvestments
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PreferredStockDividendRatePerDollarAmount

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

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ProceedsFromLinesOfCredit
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ProceedsFromNotesPayable
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ProceedsFromRepaymentsOfCommercialPaper
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:RealEstateTaxesAndInsurance
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:RepaymentsOfLinesOfCredit
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:RepaymentsOfNotesPayable
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:RepaymentsOfSecuredDebt
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueConversionOfUnits
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:BalanceSheetLocation
maa:AccruedRealEstateTaxes

maa:BuildingsImprovementsAndOther
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:Range, us-gaap:StatementClassOfStock
maa:CommonStockDiscountRate
us-gaap:PartnerTypeOfPartnersCapitalAccount
maa:LiabilitiesAndCapital
us-gaap:DebtInstrument
maa:NotesPayableExcludingInterestRateSwapsAndCapAgreements
us-gaap:InvestmentType
maa:NumberOfUnitsUnderDevelopmentCommunity

maa:ParentLPStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

maa:RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet

maa:RealEstateAssetsNet
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents
maa:RedeemableCapitalSharesParOrStatedValuePerShare
us-gaap:PartnerTypeOfPartnersCapitalAccount
maa:StockholdersEquityIncludingNoncontrollingInterest
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:UndevelopedLand

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances

srt:RealEstateFederalIncomeTaxBasis

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:AccumulatedDistributionsInExcessOfNetIncome
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementGeographical, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:AreaOfLand
us-gaap:StatementGeographical, us-gaap:BusinessAcquisition, us-gaap:PropertyPlantAndEquipmentByType
us-gaap:InvestmentType
us-gaap:AreaOfRealEstateProperty
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:Capital
maa:DebtInformation, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:CommercialPaper

us-gaap:CommonStockValueOutstanding
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
maa:DebtInformation, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
maa:DebtInformation, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:CreditFacility
us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount
dei:LegalEntity, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsGross
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty
us-gaap:DerivativeCapInterestRate
us-gaap:BalanceSheetLocation
us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:DueToRelatedPartiesCurrent
us-gaap:FairValueByMeasurementFrequency
us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeStockOwnershipPlanESOPDeferredSharesFairValue
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:GeneralPartnersCapitalAccount
us-gaap:BalanceSheetLocation
us-gaap:InterestPayableCurrentAndNoncurrent
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:LandAvailableForDevelopment

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LettersOfCreditOutstandingAmount
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:LimitedPartnersCapitalAccount
us-gaap:StatementEquityComponents
maa:DebtInformation, us-gaap:LongtermDebtType
us-gaap:LineOfCredit

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:DebtInstrument

us-gaap:LossContingencyAccrualAtCarryingValue

us-gaap:MinorityInterestInJointVentures
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:MinorityInterestInOperatingPartnerships
us-gaap:Ownership
us-gaap:MinorityInterestOwnershipPercentageByParent
maa:DebtInformation, us-gaap:DebtInstrument
us-gaap:MortgageLoansOnRealEstate
maa:DebtInformation, us-gaap:LongtermDebtType

us-gaap:NotesPayable
us-gaap:DebtInstrument
us-gaap:LongtermDebtType
us-gaap:DebtInstrument
us-gaap:NotesPayableFairValueDisclosure
us-gaap:InvestmentType, us-gaap:StatementScenario
us-gaap:NumberOfRealEstateProperties
us-gaap:StatementScenario
us-gaap:StatementScenario, us-gaap:InvestmentType

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLossCarryforwards
us-gaap:ConsolidatedEntities
us-gaap:PartnersCapital
us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents
us-gaap:ConsolidatedEntities, us-gaap:StatementEquityComponents

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest
us-gaap:PartnerCapitalComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:StatementEquityComponents
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PreferredUnitsPreferredPartnersCapitalAccounts

us-gaap:RealEstateAccumulatedDepreciation

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfLand

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfLand

us-gaap:RealEstateGrossAtCarryingValue

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:RealEstateInvestmentPropertyAtCost
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:RealEstateInvestmentPropertyNet
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:RealEstateInvestmentsJointVentures
us-gaap:BalanceSheetLocation
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:BalanceSheetLocation
us-gaap:ProductOrService, us-gaap:RealEstateProperties

us-gaap:RestrictedCash
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:SecuredDebt
us-gaap:PartnerTypeOfPartnersCapitalAccount
us-gaap:BalanceSheetLocation
us-gaap:SecurityDepositLiability
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests
us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:UnsecuredDebt
us-gaap:PartnerTypeOfPartnersCapitalAccount

Plots across concepts


IncomeStatement
Net Income Loss
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Liability
Assets
Cash And Cash Equivalents At Carrying Value
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Operating Lease Right Of Use Asset
Liabilities
Operating Lease Liability
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
Per Share
Earnings Per Share Diluted
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Share Based Compensation
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Due Year Four

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStockNANA114.252NANANA0.114139NANANA0.113746NANANANANANANANANANANANANANA34.809NANANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:PreferredStockNANA0.868NANANA0.000868NANANA0.000868NANANANANANANANANANANANANANANANANANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁114.812114.575NA114.468114.438114.494NA114.137114.087113.933NA113.91113.853NA42.70242.6944.149NA43.22141.02839.607NA37.35538.92337.904NA33.41330.736NA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁114.494114.263NA114.216114.204114.111NA113.877113.838113.726NA113.671113.646NA42.70242.6942.354NA41.40540.98339.505NA37.27436.83635.706NA33.31230.628NA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities maa:LimitedPartnershipUnits▁█3.94.1NA4.14.14.1NA4.14.14.1NA4.14.1NANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic █▁▃▂▃▁▅▃▂▂▂▂▂1.880.40.72000000000000020.520.650.311.29999999999999980.680.530.550.530.460.52NA1.041.380.50.530.740.690.60.490.370.20.250.20.110.040.21
 us-gaap:EarningsPerShareBasic us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner█▁▃▂▃▁▅▃▂▂▂▂▂1.880.40.72000000000000020.520.650.311.30.680.530.550.530.460.52NANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareDiluted █▁▃▂▃▁▅▃▂▂▂▂▂1.880.40.720.520.650.311.29999999999999980.680.530.550.530.460.52NA1.041.370.50.530.740.690.60.490.370.20.240.20.110.040.21
 us-gaap:EarningsPerShareDiluted us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner█▁▃▂▃▁▅▃▂▂▂▂▂1.880.40.72000000000000020.520.650.311.30.680.530.550.530.460.52NANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 EBT Margin us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner█▆▆▆▄▅▅▅▄▃▂▂▁436.927425.005423.661423.199413.026418.098416.817415.632407.39401.178398.148397.108390.073NANANANANANANANANANANANANANANANA
 Net profit Margin us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner█▆▆▆▄▅▅▅▄▃▂▂▁436.927425.005423.661423.199413.026418.098416.817415.632407.39401.178398.148397.108390.073NANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ComprehensiveIncomeNetOfTax █▁▃▂▂▁▅▂▂▂▁▂▂216.70547.46283.6160.17975.33136.892151.28172.86756.12560.57249.51456.36164.793NA46.02174.61925.36826.7231.2929.07127.93823.00714.4756.79916.05219.6872.696NANA
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest █▁▃▂▃▁▆▂▂▂▂▂▂7.4481.6812.9672.1362.6751.3135.5342.6192.0122.1851.8132.042.353NA1.832.4421.0031.0782.71.3541.3781.5510.6940.2290.564NANANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest █▁▃▂▂▁▅▂▂▂▁▂▂224.15349.14386.57762.31578.00638.205156.81575.48658.13762.75751.32758.40167.146NA47.85177.06126.37127.79833.9930.42529.31626.04515.1697.02816.616NANANANA
us-gaap:GeneralAndAdministrativeExpense ██▇▇▆█▆▇▆▇▅▃▅▂▂▁▁▁▁▁▁▂▂▃▂▁▁▁▁13.11412.97911.67711.3610.55713.26410.88511.48510.59812.3379.0636.389.2114.3423.9763.3893.2393.3263.5273.4623.4474.0783.9965.4394.613.4762.9573.112.811
us-gaap:IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity █▃▄▃▄▃▆▄▃▃▃▃▃▁▂▂▂▂▂▂▂▂▂7.3971.6712.9572.1262.6661.3045.4712.8142.2242.2982.2351.9132.174-0.5340.6450.6130.8250.5140.50.6650.6910.4670.4NANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▁▃▂▃▁▅▃▂▂▂▂▂225.59549.53186.74662.27378.6138.212155.49882.57264.38866.20263.72654.91862.195NA16.55916.95721.95120.01716.4116.52515.88211.5079.6227.8479.47.7117.1557.10310.125
us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest █▂▄▃▃▂▆▃▃▃▃▃▃▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁223.87548.86486.29962.03677.72837.952155.0681.45964.14165.95863.51754.70461.9819.81916.61917.00422.00519.96416.33816.45815.85111.4449.5157.6698.6417.4186.8736.805NA
us-gaap:IncomeTaxExpenseBenefit █▃▂▁▄▁▂▅▂▁▂▁▁2.0450.9990.7950.6651.20.6670.8821.4910.6820.6410.7850.6160.57NANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxesPaid █▂▂█▂▂▂▂█▂▁▂2.3930.0810.0152.4140.0860.0340.0370.0572.3930.059-0.1960.076NANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense ▁▂▃▃▄▆▆▇██▇▇▆38.86739.67240.95241.0142.11843.48243.69844.51345.93645.744.45444.6543.585NA14.94115.27115.71615.77314.69814.2714.3515.02215.48714.14913.9914.48813.58713.98213.891
us-gaap:InterestPaidNet ▆▂▆▂▆▂▆▂▇▁█▂54.12426.99855.57124.90458.89325.7361.49423.27766.6518.32273.39523.567NANA14.92417.2116.413.21517.29413.5316.91116.42515.19614.51613.51814.87813.2614.27214.186
us-gaap:NetIncomeLoss █▂▄▃▃▂▆▃▃▃▃▃▃▁▂▃▁▂▂▂▂▁▁▁▁▁▁▁▁216.47847.19383.34259.9175.06236.648149.58978.64561.91763.6661.28252.79159.80714.86644.28459.08921.1822.30730.86628.1623.8918.75813.7917.4288.8446.946.7496.669.412
us-gaap:NetIncomeLossAttributableToNoncontrollingInterest █▂▄▃▃▂▆▄▃▃▃▃▃▂▃▃▂▂▂▂▂▂▁▁▁▁▁▁▁7.3971.6712.9572.1262.6661.3045.4712.8142.2242.2982.2351.9132.1740.8481.7721.9390.8250.91.2121.3121.1781.1870.660.2520.3110.2250.2240.2280.437
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic █▁▃▂▂▁▅▃▂▂▂▂▂215.55646.27182.4258.98874.1435.726148.66777.72360.99562.73860.3651.86958.885NA44.28459.08921.1822.30730.86628.1623.8918.75813.7917.4288.8446.943.5441.3836.196
 us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:ConsolidatedEntities maa:MAALP▁█0.2780.279NA0.2790.2780.253NA-5.973-6.004-3.201NA3.697NANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:ConsolidatedEntities,us-gaap:StatementEquityComponents maa:MAALP,us-gaap:AociAttributableToNoncontrollingInterest▁█0.2780.279NA0.2790.2780.253NA-5.973-6.004-3.201NA3.697NANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:PartnerTypeOfPartnersCapitalAccount maa:MidAmericaApartmentCommunitiesIncShareholdersEquity▁█0.2780.279NA0.2790.2780.253NA-5.973-6.004-3.201NA3.697NANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:PartnerTypeOfPartnersCapitalAccount,us-gaap:StatementEquityComponents maa:MidAmericaApartmentCommunitiesIncShareholdersEquity,maa:NoncontrollingInterestOperatingPartnership█▁0.0510.01NA0.010.0090.009NA-0.195-0.212-0.113NA0.127NANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:PartnerTypeOfPartnersCapitalAccount,us-gaap:StatementEquityComponents maa:MidAmericaApartmentCommunitiesIncShareholdersEquity,us-gaap:AccumulatedOtherComprehensiveIncome▁█0.2270.269NA0.2690.2690.244NA-5.778-5.792-3.088NA3.57NANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense █▃█▅▇▁▅█▆▅▅▅▆20.126-15.91318.5040.24214.643-28.532-0.49520.064.7750.119-0.6310.3748.032NANANANANANANANANANANANANANANANA
us-gaap:PreferredStockDividendsIncomeStatementImpact ▄▄▄▄▄▄▄▄▄▄▄▄▄0.9220.9220.9220.9220.9220.9220.9220.9220.9220.9220.9220.9220.922NANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss █▁▃▂▂▁▅▃▂▂▂▂▂223.87548.86486.29962.03677.72837.952155.0681.45964.14165.95863.51754.70461.981NA46.05661.02822.00523.20732.07829.47225.06819.94514.4517.689.1557.1656.9736.8889.849
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments maa:NonSameStoreAndOther▂▁▅▅▄▅██▆▅▆▅▂19.19817.72525.9325.46523.03925.730.93431.18226.60224.47527.50626.22520.4NANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments maa:SameStore█▇▆▆▅▆▅▅▄▄▁▁▁413.967404.056395.235394.556386.581389.707382.878381.091376.977373.465344.61343.47342.775NANANANANANANANANANANANANANANANA
us-gaap:Revenues ████████▇▇▇▇▇▄▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁436.927425.005423.661423.199413.026418.098416.817415.632407.39401.178398.148397.108390.073243.487136.44134.112133.367131.394127.11123.922119.631117.575115.827110.489107.338103.431100.88198.39597.464
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:Assets ▆▄▄▁▁▂▆▇█11242.1211192.37811194.79111128.70411131.31311155.97711230.4511247.75411274.83NA11323.781NANA6785.6633028.2572834.2172775.0082751.0682775.8352599.0882527.412530.4682412.0272313.5212201.7472176.048NANANA
us-gaap:Liabilities ▆█▆▃▂▁▁▃▃5099.7615155.0175090.9864995.6084946.4034929.1454926.864997.4884990.201NA4942.178NANANA1993.1971816.8991807.5041801.2451845.831728.4281659.2461782.9691729.941669.0791574.7251631.656NANANA
us-gaap:LiabilitiesAndStockholdersEquity ▆▄▄▁▁▂▆▇█11242.1211192.37811194.79111128.70411131.31311155.97711230.4511247.75411274.83NA11323.781NANANA3028.2572834.2172775.0082751.0682775.8352599.0882527.412530.4682412.0272313.5212201.7472176.048NANANA
us-gaap:StockholdersEquity ▄▁▃▄▅▆█▇█5918.7155804.7165871.6335904.0725954.8345997.4196068.5656016.4526051.466NA6149.84NANANA990.377980.297932.184914.052894.175839.387834.526718.331654.501617.64600.005518.503NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▄▅▃▁▁▅▂▃▇█▅█▅31.88132.6225.19818.40719.66734.50820.47625.82640.97244.62334.25946.13932.61NA181.1058.7928.2249.07513.42222.34141.82657.31724.25412.83847.22245.942100.09125.24532.329
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▃▃▂▁▂▄▇▃▅▅▄█▅43.00443.37535.61527.58935.59449.04770.54142.68257.68459.38751.67379.460.803NANANANANANANANANANANANANANANANA
us-gaap:Land █▆▄▃▃▃▂▂▁1987.4121955.6271929.1811909.3431910.6551910.6371905.7571898.5091883.96NA1868.828NANANA394.848396.734389.839386.67388.007358.429337.22333.846320.055312.384291.695288.89NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:ConstructionInProgressGross ███▅▅▃▂▁▁295.645295.933283.477220.685196.824158.893116.424101.46997.526NA59.506NANANA31.59547.66251.62552.45561.80175.55274.29453.7935.33231.43720.48811.501NANANA
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures ▁▃▄▅▅▆▆▇█42.93343.21143.32543.46743.5943.68643.67443.81643.997NA44.181NANANA3.2373.1780.7494.8375.166.20216.56717.00617.1917.61318.25317.505NANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▂▂▃▄▇█▆▇48.348.949.450.150.653.454.353.053.5NANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:LongTermDebt us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty maa:Encumbrance1NANA172.0NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty maa:Encumbrance2NANA118.8NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty maa:Encumbrance3NANA191.3NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ███▁2.8942.8942.8942.854NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁▁█2.8622.8622.8622.875NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive ███▁2.8722.8722.8722.853NANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive ▁▁▁█62.91362.91362.91365.863NANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:StockholdersEquity ▄▁▃▄▅▆█▇█5918.7155804.7165871.6335904.0725954.8345997.4196068.5656016.4526051.466NA6149.84NANANA990.377980.297932.184914.052894.175839.387834.526718.331654.501617.64600.005518.503NANANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest ▄▁▃▄▅▆█▇█6120.6676019.5336088.4086119.2556171.5776215.5656289.4596236.616272.526NA6372.189NANANA1030.0211011.797962.313945.11925.372865.963863.718743.462678.299640.3623.268540.628485.483497.904NA
us-gaap:AdditionalPaidInCapital █▆▅▄▄▄▄▁▁7201.8857182.7717176.7937173.3917168.8867170.1487166.0737149.8897146.076NA7138.17NANANA1562.2111569.091565.7551542.9991520.251494.1721491.1831375.6231310.4691264.8531230.471142.023NANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▅▅▄▄▄▃▃▁█-11.632-11.859-12.128-12.396-12.665-12.934-13.178-14.87-9.092NA-0.212NANA2.691-4.599-6.336-21.869-26.054-30.467-30.891-31.8-35.848-41.584-42.268-41.639-48.847NANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner▂▂▂▂▂▂▁▁▃▄▅█▇-11.939-12.217-12.496-12.774-13.053-13.331-13.584-15.339-9.366-3.362-0.16112.0298.332NANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:PartnerTypeOfPartnersCapitalAccount,us-gaap:StatementEquityComponents maa:MidAmericaApartmentCommunitiesIncShareholdersEquity,us-gaap:CommonStock▄▄0.0010.001NANANANANA0.00.0010.001NANANANANANANANANANANANANANANANANANANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:PartnerTypeOfPartnersCapitalAccount maa:MidAmericaApartmentCommunitiesIncShareholdersEquity▁█3.6964.156NA3.8664.0594.059NA3.9123.9253.941NA3.581NANANANANANANANANANANANANANANANANA
 us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:PartnerTypeOfPartnersCapitalAccount,us-gaap:StatementEquityComponents maa:MidAmericaApartmentCommunitiesIncShareholdersEquity,maa:NoncontrollingInterestOperatingPartnership▁█3.6964.156NA3.8664.0594.059NA3.9123.9253.941NA3.581NANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInOperatingActivities █▂▄█▇▃▃█▆▂▁▇249.207148.111180.064254.27229.013160.602159.882253.071213.789154.678133.236237.051NANA59.39567.26542.11752.94657.15763.02437.8443.07745.6652.24931.30227.12639.75241.78325.133
us-gaap:NetCashProvidedByUsedInInvestingActivities █▄▁▅▄▅█▅▅▆▅▆-20.039-112.499-191.579-95.317-107.846-89.989-7.592-89.855-87.942-52.884-78.592-66.396NANA-23.136-19.988-51.241-18.241-197.743-79.197-34.042-120.975-94.615-179.283-47.287-66.007-136.642-83.12231.5
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner█▄▁▅▄▅█▅▅▆▅▆▂-20.039-112.499-191.579-95.317-107.846-89.989-7.592-89.855-87.942-52.884-78.592-66.396-174.697NANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▇█▃▄▅▄▂▄▅▅▃-229.539-27.85219.541-166.958-134.62-92.107-124.431-178.218-127.55-94.08-82.371-152.058NANA136.054-46.7098.273-39.052131.667-3.312-19.289110.96160.37192.6517.265-15.268171.73634.255-38.123
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner▁▇█▃▄▅▄▂▄▅▅▃▆-229.539-27.85219.541-166.958-134.62-92.107-124.431-178.218-127.55-94.08-82.371-152.058-57.911NANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▅▆▃▃▂█▃▄▅▁▇-0.3717.768.026-8.005-13.453-21.49427.859-15.002-1.7037.714-27.72718.597NANANANANANANANANANANANANANANANANA
 us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner▄▅▆▃▃▂█▃▄▅▁▇-0.3717.768.026-8.005-13.453-21.49427.859-15.002-1.7037.714-27.72718.597NANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:DepreciationDepletionAndAmortization ██▆▅▅▄▄▃▃▂▁▃132.092131.82129.74127.833127.448126.657125.58124.944124.184123.082121.772124.702NANA33.92233.99934.23734.50433.3532.79231.54931.85430.15728.86228.45628.28527.14125.59125.675
us-gaap:NetCashProvidedByUsedInOperatingActivities █▂▄█▇▃▃█▆▂▁▇249.207148.111180.064254.27229.013160.602159.882253.071213.789154.678133.236237.051NANA59.39567.26542.11752.94657.15763.02437.8443.07745.6652.24931.30227.12639.75241.78325.133
us-gaap:NetIncomeLoss █▂▄▃▃▂▆▃▃▃▃▃▃▁▂▃▁▂▂▂▂▁▁▁▁▁▁▁▁216.47847.19383.34259.9175.06236.648149.58978.64561.91763.6661.28252.79159.80714.86644.28459.08921.1822.30730.86628.1623.8918.75813.7917.4288.8446.946.7496.669.412
us-gaap:ProfitLoss █▁▃▂▂▁▅▃▂▂▂▂▂223.87548.86486.29962.03677.72837.952155.0681.45964.14165.95863.51754.70461.981NA46.05661.02822.00523.20732.07829.47225.06819.94514.4517.689.1557.1656.9736.8889.849
us-gaap:ShareBasedCompensation ▅█▁▆▃█▂▄▄▇▃▃3.8435.3691.7974.3822.8625.2882.1043.3133.4524.7852.5672.89NANA0.5580.5410.630.5030.4990.4170.8141.0742.7590.8420.8441.098NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInInvestingActivities █▄▁▅▄▅█▅▅▆▅▆-20.039-112.499-191.579-95.317-107.846-89.989-7.592-89.855-87.942-52.884-78.592-66.396NANA-23.136-19.988-51.241-18.241-197.743-79.197-34.042-120.975-94.615-179.283-47.287-66.007-136.642-83.12231.5
 us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner█▄▁▅▄▅█▅▅▆▅▆▂-20.039-112.499-191.579-95.317-107.846-89.989-7.592-89.855-87.942-52.884-78.592-66.396-174.697NANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▇█▃▄▅▄▂▄▅▅▃-229.539-27.85219.541-166.958-134.62-92.107-124.431-178.218-127.55-94.08-82.371-152.058NANA136.054-46.7098.273-39.052131.667-3.312-19.289110.96160.37192.6517.265-15.268171.73634.255-38.123
 us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount us-gaap:LimitedPartner▁▇█▃▄▅▄▂▄▅▅▃▆-229.539-27.85219.541-166.958-134.62-92.107-124.431-178.218-127.55-94.08-82.371-152.058-57.911NANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock ██▆▆▆▆▄▄▄▃▁▁117.349117.242114.372114.365114.348114.27109.504109.481109.434109.324105.015104.991NANA29.69929.69729.41827.89427.12327.00925.72323.69723.26722.98822.07620.96319.97418.31217.886
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage dei:LegalEntity,us-gaap:DebtInstrument,us-gaap:LongtermDebtType maa:MAALP,maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne,us-gaap:UnsecuredDebtNANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne,us-gaap:UnsecuredDebtNANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312010-12-312009-12-312008-12-312007-12-31
Value1140.1141390.1137460.113540.11341534292825
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStock


Shares
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312009-12-312008-12-312007-12-31
Value0.8680.0008680.0008680.0008680.0008686.26.26.2
Percentage of SharesIssued0.80.80.80.80.821.422.024.2

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value1141141141141141141141131131134242444341393738373330
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value1141141141141141131131131131134242424140393736353330
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

maa:LimitedPartnershipUnits


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value3900000.04100000.04100000.04100000.04100000.04100000.04100000.04100000.04100000.04100000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.880.40.720.520.650.311.30.680.530.550.530.460.521.041.380.50.530.740.690.60.490.370.20.250.20.110.040.21
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareBasic us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1.880.40.720.520.650.311.30.680.530.550.530.460.520.421.081.00.420.360.451.120.60.610.571.221.810.81
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.880.40.720.520.650.311.30.680.530.550.530.460.521.041.370.50.530.740.690.60.490.370.20.240.20.110.040.21
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareDiluted us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1.880.40.720.520.650.311.30.680.530.550.530.460.520.421.081.00.420.360.451.120.60.610.571.221.810.81
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value21647836075361517256604956644674252631292723146.79916192.696
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues49.611.219.714.218.28.836.317.513.815.112.414.216.633.755.619.020.324.623.523.419.612.56.215.019.02.7

us-gaap:ComprehensiveIncomeNetOfTax us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2244986627838156755862515867
Percentage of ComprehensiveIncomeNetOfTax103.4103.5103.5103.5103.6103.6103.6103.6103.6103.6103.7103.6103.6
Percentage of Revenues51.311.620.414.718.99.137.618.214.315.612.914.717.2
Percentage of Revenues us-gaap:LimitedPartner51.311.60.014.718.99.137.618.214.315.612.914.717.2

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value7.4481.6812.9672.1362.6751.3135.5342.6192.0122.1851.8132.042.3531.832.4421.0031.0782.71.3541.3781.5510.6940.2290.564
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.70.40.70.50.60.31.30.60.50.50.50.50.61.31.80.80.82.11.11.21.30.60.20.5

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value22449866278381567558625158674777262733302926157.02816
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues51.311.620.414.718.99.137.618.214.315.612.914.717.235.157.519.821.226.724.624.522.213.16.415.5

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value131211111013101110129.0636.389.2114.3423.9763.3893.2393.3263.5273.4623.4474.0783.9965.4394.613.4762.9573.112.811
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues3.03.12.82.72.63.22.62.82.63.12.31.62.41.82.92.52.42.52.82.82.93.53.44.94.33.42.93.22.9

us-gaap:GeneralAndAdministrativeExpense us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value131211111013101110139.0636.389.211109.4598.3619.534128.7836.6617.0146.582
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0106.6100.0100.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues3.03.12.82.72.63.22.62.82.63.32.31.62.40.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner3.03.10.02.72.63.22.62.82.63.32.31.62.42.62.52.22.53.42.92.42.62.4

Income Loss From Continuing Operations Attributable To Noncontrolling Entity

us-gaap:IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity

us-gaap:IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value7.3971.6712.9572.1262.6661.3045.4712.8142.2242.2982.2351.9132.174-0.534-0.4040.6450.6130.8250.5140.50.6650.6910.4670.4
Percentage of IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.70.40.70.50.60.31.30.70.50.60.60.50.6-0.20.00.50.50.60.40.40.50.60.40.3

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value225498662783815582646663546216162120161615119.6227.8479.47.7117.1557.10310
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues51.611.720.514.719.09.137.319.915.816.516.013.815.912.112.616.515.212.913.313.39.88.37.18.87.57.17.210.4

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value225498662783815582646663546250128119504342894845
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues51.611.720.514.719.09.137.319.915.816.516.013.815.90.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner51.611.70.014.719.09.137.319.915.816.516.013.815.913.233.531.013.211.513.832.317.717.1

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value22348866277371558164656354619.819-16.46916172219161615119.5157.6698.6417.4186.8736.805
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues51.211.520.414.718.89.137.219.615.716.416.013.815.94.00.012.212.716.515.212.913.313.29.78.26.98.17.26.86.9

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2045000.0999000.0795000.0665000.01200000.0667000.0882000.01491000.0682000.0641000.0785000.0616000.0570000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.50.20.20.20.30.20.20.40.20.20.20.20.1

us-gaap:IncomeTaxExpenseBenefit us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2045000.0999000.0795000.0665000.01200000.0667000.0882000.01491000.0682000.0641000.0785000.0616000.0570000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.50.20.20.20.30.20.20.40.20.20.20.20.1
Percentage of Revenues us-gaap:LimitedPartner0.50.20.00.20.30.20.20.40.20.20.20.20.1

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2393000.081000.015000.02414000.086000.034000.037000.057000.02393000.059000.0-196000.076000.0
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.50.00.00.60.00.00.00.00.60.0-0.00.0

us-gaap:IncomeTaxesPaid us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2393000.081000.015000.02414000.086000.034000.037000.057000.02393000.059000.0-196000.076000.0148000.02522000.0110000.030000.02216000.010000.011000.027000.01525000.019000.0
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues0.50.00.00.60.00.00.00.00.60.0-0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner0.50.00.00.60.00.00.00.00.60.0-0.00.00.00.70.00.00.60.00.00.00.60.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value38394041424343444545444443141515151414141515141314131313
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 Revenues8.99.39.79.710.210.410.510.711.311.411.211.211.211.011.411.812.011.611.512.012.813.412.813.014.013.514.214.3

us-gaap:InterestExpense us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value3839404142434344454544444340393938363332323230303030
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues8.99.39.79.710.210.410.510.711.311.411.211.211.20.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner8.99.30.09.710.210.410.510.711.311.411.211.211.210.610.410.410.19.710.911.611.812.011.711.511.811.9

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value542655245825612366187323141716131713161615141314131414
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues12.46.413.15.914.36.214.85.616.44.618.45.910.912.812.310.113.610.914.114.013.113.112.614.413.114.514.6

us-gaap:InterestPaidNet us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value54265524582561236618732362244343552448254525
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues12.46.413.15.914.36.214.85.616.44.618.45.916.10.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner12.46.40.05.914.36.214.85.616.44.618.45.916.16.411.211.414.46.515.89.116.99.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2164783597536149786163615259144459212230282318137.4288.8446.946.7496.669.412
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues49.511.119.714.218.28.835.918.915.215.915.413.315.36.132.544.115.917.024.322.720.016.011.96.78.26.76.76.89.7

us-gaap:NetIncomeLoss us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2224761763780636553
Percentage of NetIncomeLoss103.0101.6102.0102.3101.0102.4102.1102.2101.9
Percentage of Revenues51.011.314.418.68.919.415.516.213.5
Percentage of Revenues us-gaap:LimitedPartner51.011.314.418.68.919.415.516.213.5

Net Income Loss Attributable To Noncontrolling Interest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest

us-gaap:NetIncomeLossAttributableToNoncontrollingInterest


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value7.3971.6712.9572.1262.6661.3045.4712.8142.2242.2982.2351.9132.1740.8481.7721.9390.8250.91.2121.3121.1781.1870.660.2520.3110.2250.2240.2280.437
Percentage of NetIncomeLossAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.70.40.70.50.60.31.30.70.50.60.60.50.60.31.31.40.60.71.01.11.01.00.60.20.30.20.20.20.4

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value21546825874351487760626051584459212230282318137.4288.8446.943.5441.3836.196
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues49.310.919.513.918.08.535.718.715.015.615.213.115.132.544.115.917.024.322.720.016.011.96.78.26.73.51.46.4

Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:ConsolidatedEntities

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax

maa:MAALP


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value278000.0279000.0279000.0278000.0253000.0-5973000.0-6004000.0-3201000.03697000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.10.10.10.1-1.4-1.5-0.80.9
Percentage of Revenues maa:MAALP0.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:ConsolidatedEntities, us-gaap:StatementEquityComponents

maa:MAALP, us-gaap:AociAttributableToNoncontrollingInterest


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value278000.0279000.0279000.0278000.0253000.0-5973000.0-6004000.0-3201000.03697000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.10.10.10.1-1.4-1.5-0.80.9
Percentage of Revenues maa:MAALP us-gaap:AociAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value278000.0279000.0279000.0278000.0253000.0-5973000.0-6004000.0-3201000.03697000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.10.10.10.10.1-1.4-1.5-0.80.9
Percentage of Revenues maa:MidAmericaApartmentCommunitiesIncShareholdersEquity0.00.00.00.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, maa:NoncontrollingInterestOperatingPartnership


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value51000.010000.010000.09000.09000.0-195000.0-212000.0-113000.0127000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax18.33.63.63.23.63.33.53.53.4
Percentage of Revenues0.00.00.00.00.0-0.0-0.1-0.00.0
Percentage of Revenues maa:MidAmericaApartmentCommunitiesIncShareholdersEquity maa:NoncontrollingInterestOperatingPartnership0.00.00.00.00.00.00.00.00.0

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value227000.0269000.0269000.0269000.0244000.0-5778000.0-5792000.0-3088000.03570000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax81.796.496.496.896.496.796.596.596.6
Percentage of Revenues0.10.10.10.10.1-1.4-1.4-0.80.9
Percentage of Revenues maa:MidAmericaApartmentCommunitiesIncShareholdersEquity us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value20-15.913180.24214-28.532-0.495204.7750.119-0.6310.3748.032
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.6-3.74.40.13.5-6.8-0.14.81.20.0-0.20.12.1

us-gaap:OtherNonoperatingIncomeExpense us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value20-15.913180.24214-28.532-0.495204.7750.935-0.6310.3748.032-2.3413.325.6952.6272.711
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0785.7100.0100.0100.00.00.00.00.00.0
Percentage of Revenues4.6-3.74.40.13.5-6.8-0.14.81.20.2-0.20.12.10.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner4.6-3.70.00.13.5-6.8-0.14.81.20.2-0.20.12.1-0.60.91.50.70.7

Preferred Stock Dividends Income Statement Impact

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:PreferredStockDividendsIncomeStatementImpact


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0000000
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0
Percentage of Revenues0.20.20.20.20.20.20.20.20.20.20.20.20.20.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value22348866277371558164656354614661222332292519147.689.1557.1656.9736.8889.849
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues51.211.520.414.718.89.137.219.615.716.416.013.815.933.845.516.517.725.223.821.017.012.57.08.56.96.97.010.1

us-gaap:ProfitLoss us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value223488662773715581646563546150128118504342884745459614364
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues51.211.520.414.718.89.137.219.615.716.416.013.815.90.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner51.211.50.014.718.89.137.219.615.716.416.013.815.913.233.430.913.111.513.732.117.517.017.237.055.625.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

maa:NonSameStoreAndOther


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value19172525232530312624272620
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues4.44.26.16.05.66.17.47.56.56.16.96.65.2
Percentage of Revenues maa:NonSameStoreAndOther97.998.60.099.599.699.90.099.699.399.30.095.295.6

maa:SameStore


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value413404395394386389382381376373344343342
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2156.32279.61524.21549.41677.91516.41237.71222.21417.11525.91252.91309.71680.3
Percentage of Revenues94.795.193.393.293.693.291.991.792.593.186.686.587.9
Percentage of Revenues maa:SameStore99.299.30.099.299.299.30.099.299.099.20.092.993.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4364254234234134184164154074013983973902431361341331311271231191171151101071031009897
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value436425423423413418416415407401398397390386382384382378307276272269263261258258
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Revenues us-gaap:StatementBusinessSegments

maa:NonSameStoreAndOther


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value19172625232531312624282721
Percentage of Revenues4.54.26.26.05.66.27.67.56.66.17.16.95.5
Percentage of Revenues4.54.26.26.05.66.27.67.56.66.17.16.95.5
Percentage of Revenues maa:NonSameStoreAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:SameStore


Revenuesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value417407397397389392385384380376369369368
Percentage of Revenues95.595.893.894.094.493.892.492.593.493.992.993.194.5
Percentage of Revenues95.595.893.894.094.493.892.492.593.493.992.993.194.5
Percentage of Revenues maa:SameStore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value11242111921119411128111311115511230112471127411323678568413028283427752751277525992527253024122313220121761986
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidatedEntities, us-gaap:ProductOrService

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:RealEstate


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value1931481289677534685
Percentage of Assets1.71.31.20.90.70.50.40.8
Percentage of Assets1.71.31.20.90.70.50.40.8
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:RealEstate100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value112421119211194111281113111155112301124711274113031132311418114471141711491115321153411559116046847
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LimitedPartner100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

maa:NonSameStoreAndOther


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value107810001299119811461107136213451233116345644638674692643949952755639760659560359
Percentage of Assets9.68.911.610.810.39.912.112.010.910.367.367.822.324.423.234.534.329.125.330.027.324.216.5
Percentage of Assets9.68.911.610.810.39.912.112.010.910.367.367.822.324.423.234.534.329.125.330.027.324.216.5
Percentage of Assets maa:NonSameStoreAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:SameStore


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value99511000697149740982398939661972998499991
Percentage of Assets88.589.486.887.588.388.786.086.587.488.2
Percentage of Assets88.589.486.887.588.388.786.086.587.488.2
Percentage of Assets maa:SameStore100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Corporate


Assetsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value212184180189161154205172191169194153282603938
Percentage of Assets1.91.61.61.71.41.41.81.51.71.52.92.29.32.11.41.4
Percentage of Assets1.91.61.61.71.41.41.81.51.71.52.92.29.32.11.41.4
Percentage of Assets us-gaap:Corporate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value50995155509049954946492949264997499049421993181618071801184517281659178217291669157416311530
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets45.446.145.544.944.444.243.944.444.343.665.864.165.165.566.566.565.770.571.772.171.575.077.0

us-gaap:Liabilities us-gaap:ConsolidatedEntities, us-gaap:ProductOrService

us-gaap:VariableInterestEntityPrimaryBeneficiary, us-gaap:RealEstate


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value12118.1108.44.93.21.3
Percentage of Liabilities0.30.20.20.20.20.10.10.0
Percentage of Assets0.10.10.10.10.10.00.00.0
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary us-gaap:RealEstate6.68.06.310.610.99.27.01.5

us-gaap:Liabilities us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Liabilitiesus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value50995155509149954946492949264997499049674942497749584889490749714991496349523681
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Assets45.446.145.544.944.444.243.944.444.30.043.60.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LimitedPartner45.446.145.544.944.444.243.944.444.343.943.643.643.342.842.743.143.342.942.753.8

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value112421119211194111281113111155112301124711274113233028283427752751277525992527253024122313220121761986
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesAndStockholdersEquity us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Liabilities
Period End2021-06-302021-03-312020-12-312019-12-31
Value11242111921119411230
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0
Percentage of Assets us-gaap:LimitedPartner100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5918580458715904595459976068601660516149990980932914894839834718654617600518430
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.651.952.453.153.553.854.053.553.754.332.734.633.633.232.232.333.028.427.126.727.323.821.7

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-312007-12-31
Value31322518193420254044344632101818.7928.2249.07513224157241247451002532139.42617
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.20.20.20.30.20.20.40.00.30.00.00.06.00.30.30.30.50.91.72.31.00.62.12.10.00.00.00.70.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value31322518193420254044344632591047393333272628372689
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.30.30.20.20.20.30.20.20.40.00.30.00.00.00.00.00.00.00.00.00.00.00.00.01.3
Percentage of Assets us-gaap:LimitedPartner0.30.30.20.20.20.30.20.20.40.40.30.40.30.50.10.40.30.30.30.00.00.00.50.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value4343352735497042575951796088121
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.30.20.30.40.60.40.50.00.50.00.00.00.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value4343352735497042575951796082881286758121
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.0100.0
Percentage of Assets0.40.40.30.20.30.40.60.40.50.00.50.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LimitedPartner0.40.40.30.20.30.40.60.40.50.50.50.70.50.70.81.10.60.51.0

Land

us-gaap:Land

us-gaap:Land


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1987195519291909191019101905189818831868394396389386388358337333320312291288255
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets17.717.517.217.217.217.117.016.916.716.513.014.014.014.114.013.813.313.213.313.513.213.312.9

us-gaap:Land us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Landus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value1987195519291909191019101905189818831878186818681868183618361828182118251816926
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Assets17.717.517.217.217.217.117.016.916.70.016.50.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LimitedPartner17.717.517.217.217.217.117.016.916.716.616.516.416.316.116.015.915.815.815.613.5

Construction In Progress Gross

us-gaap:ConstructionInProgressGross

us-gaap:ConstructionInProgressGross


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value295295283220196158116101975916631475152617574533531201110
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.62.62.52.01.81.41.00.90.90.52.41.01.71.91.92.22.92.92.11.51.40.90.50.5

us-gaap:ConstructionInProgressGross us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value29529528322019615811610197575953689311615625824223144
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Assets2.62.62.52.01.81.41.00.90.90.00.50.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LimitedPartner2.62.62.52.01.81.41.00.90.90.50.50.50.60.81.01.42.22.12.00.6

us-gaap:ConstructionInProgressGross us-gaap:StatementScenario, us-gaap:InvestmentType

maa:CostsIncurredToDate, maa:DevelopmentProperties


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value326334335264215184143
Percentage of ConstructionInProgressGross110.3113.0118.4119.6109.6116.2123.6
Percentage of Assets2.93.03.02.41.91.71.3
Percentage of Assets maa:CostsIncurredToDate maa:DevelopmentProperties0.00.00.00.00.00.00.0

maa:ExpectedCosts, maa:DevelopmentProperties


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value627528595459459489489
Percentage of ConstructionInProgressGross212.2178.4209.9208.2233.5308.1420.4
Percentage of Assets5.64.75.34.14.14.44.4
Percentage of Assets maa:ExpectedCosts maa:DevelopmentProperties0.00.00.00.00.00.00.0

Investments In Affiliates Subsidiaries Associates And Joint Ventures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value424343434343434343443.2373.1780.7494.8375.166.2021617171718178.619
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.40.40.40.40.40.40.40.10.10.00.20.20.20.70.70.70.80.80.80.4

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Investments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value424343434343434343444444444544454444441.811
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.40.40.40.40.40.40.40.40.40.00.40.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LimitedPartner0.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value484849505053545353
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.40.40.50.50.50.50.50.5

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value21618719217215714117217814912047433229332826292621262519
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.91.71.71.61.41.31.51.61.31.11.61.51.21.11.21.11.01.21.10.91.21.21.0

us-gaap:OtherAssets us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value21618719217215714117217814914412013412213513512011612413458
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0
Percentage of Assets1.91.71.71.61.41.31.51.61.30.01.10.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LimitedPartner1.91.71.71.61.41.31.51.61.31.31.11.21.11.21.21.01.01.11.20.9

Long Term Debt

us-gaap:LongTermDebt us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:LongTermDebt

maa:Encumbrance1


Long
Period End2020-12-31
Value172
Percentage of LongTermDebt100.0
Percentage of Assets1.5
Percentage of Assets maa:Encumbrance10.0

maa:Encumbrance2


Long
Period End2020-12-31
Value118
Percentage of LongTermDebt69.1
Percentage of Assets1.1
Percentage of Assets maa:Encumbrance20.0

maa:Encumbrance3


Long
Period End2020-12-31
Value191
Percentage of LongTermDebt111.2
Percentage of Assets1.7
Percentage of Assets maa:Encumbrance30.0

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
Value2894000.02894000.02894000.02854000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

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
Value2862000.02862000.02862000.02875000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value2872000.02872000.02872000.02853000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0100.0100.0100.0
Percentage of Assets0.00.00.00.0

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value62626265
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0
Percentage of Assets0.60.60.60.6

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value31313132323233333333
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.30.30.30.30.30.0

us-gaap:OperatingLeaseLiability us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201602


Operating
Period End2020-12-312019-12-312019-03-312019-01-01
Value31333333
Percentage of OperatingLeaseLiability99.9101.5100.10.0
Percentage of Assets0.30.30.00.0
Percentage of Assets us-gaap:AccountingStandardsUpdate2016020.00.00.00.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value75767778
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets0.70.70.70.7

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value44454545
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.40.40.40.4

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5918580458715904595459976068601660516149990980932914894839834718654617600518430
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.651.952.453.153.553.854.053.553.754.332.734.633.633.232.232.333.028.427.126.727.323.821.7

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-312007-12-31
Value61206019608861196171621562896236627263726573664210301011962945925865863743678640623540485497453442429
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets54.453.854.455.055.455.756.055.455.656.30.00.034.035.734.734.433.333.334.229.428.127.728.324.80.00.022.80.00.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Stockholders
Period End2021-06-302021-03-312020-12-312019-12-31
Value6120601960886289
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0
Percentage of Assets54.453.854.456.0
Percentage of Assets us-gaap:LimitedPartner54.453.854.456.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

maa:NoncontrollingInterestConsolidatedRealEstateEntity


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value9.8486.2472.3062.3062.306
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.20.10.00.00.0
Percentage of Assets0.10.10.00.00.0
Percentage of Assets maa:NoncontrollingInterestConsolidatedRealEstateEntity0.00.00.00.00.0

maa:NoncontrollingInterestsOperatingPartnership


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value206214220231235
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest3.43.43.53.53.6
Percentage of Assets1.81.91.90.00.0
Percentage of Assets maa:NoncontrollingInterestsOperatingPartnership0.00.00.00.00.0

maa:TemporaryEquity


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value15149.4141010
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.30.20.10.20.2
Percentage of Assets0.10.10.10.00.0
Percentage of Assets maa:TemporaryEquity0.00.00.00.00.0

us-gaap:AccumulatedDistributionsInExcessOfNetIncome


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-1294.182-1085.479-989.263-784.5-707.479-603.315-621.833-575.021-510.993-464.617-414.966
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-21.3-17.3-15.5-11.9-10.7-63.8-83.6-106.4-112.7-105.0-96.5
Percentage of Assets-11.6-9.7-8.70.00.0-21.9-24.6-26.4-25.70.00.0
Percentage of Assets us-gaap:AccumulatedDistributionsInExcessOfNetIncome0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value-12.128-13.178-0.2122.1571.144-26.054-35.848-48.847-47.435-72.885-15.664
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.2-0.2-0.00.00.0-2.8-4.8-9.0-10.5-16.5-3.6
Percentage of Assets-0.1-0.1-0.00.00.0-0.9-1.4-2.2-2.40.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value71767166713871217109154213751142988954832
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest117.9113.9112.0108.3107.0163.3185.0211.2218.1215.6193.7
Percentage of Assets64.163.863.00.00.056.154.452.549.80.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value1.1411.141.1361.1341.1330.4220.3890.3480.290.2820.257
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312017-03-312016-12-312012-12-312011-12-312010-12-312009-12-312008-12-312007-12-31
Value0.0090.0090.0090.0090.0090.0090.00.00.00.0620.0620.062
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value7201718271767173716871707166714971467138156215691565154215201494149113751310126412301142988
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets64.164.264.164.564.464.363.863.663.463.051.655.456.456.154.857.559.054.454.354.755.952.549.8

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value-11.632-11.859-12.128-12.396-12.665-12.934-13.178-14.87-9.092-0.2122.6910.108-4.599-6.336-21.869-26.054-30.467-30.891-31.8-35.848-41.584-42.268-41.639-48.847-47.435
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.00.00.0-0.2-0.2-0.8-0.9-1.1-1.2-1.3-1.4-1.7-1.8-1.9-2.2-2.4

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value-11.939-12.217-12.496-12.774-13.053-13.331-13.584-15.339-9.366-3.362-0.161128.3323.1672.2950.8780.8214.4381.246-1.618
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax102.6103.0103.0103.0103.1103.1103.1103.2103.00.075.90.00.00.00.00.00.00.00.00.0
Percentage of Assets-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.0-0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:LimitedPartner-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.0-0.00.10.10.00.00.00.00.00.0-0.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:StockIssuedDuringPeriodValueNewIssues

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-0.4670.1340.033-0.4160.0390.14-0.5191.129-0.035
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets maa:MidAmericaApartmentCommunitiesIncShareholdersEquity0.00.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-0.4680.1330.033-0.4160.0390.14-0.521.128-0.035
Percentage of StockIssuedDuringPeriodValueNewIssues100.299.3100.0100.0100.0100.0100.299.9100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets maa:MidAmericaApartmentCommunitiesIncShareholdersEquity us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.0

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312019-09-302019-06-302019-03-31
Value0.0010.0010.00.0010.001
Percentage of StockIssuedDuringPeriodValueNewIssues-0.20.70.0-0.20.1
Percentage of Assets0.00.00.00.00.0
Percentage of Assets maa:MidAmericaApartmentCommunitiesIncShareholdersEquity us-gaap:CommonStock0.00.00.00.00.0

Minority Interest Decrease From Distributions To Noncontrolling Interest Holders

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value3.6964.1563.8664.0594.0593.9123.9253.9413.581
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets maa:MidAmericaApartmentCommunitiesIncShareholdersEquity0.00.00.00.00.00.00.00.00.0

us-gaap:MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, maa:NoncontrollingInterestOperatingPartnership


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value3.6964.1563.8664.0594.0593.9123.9253.9413.581
Percentage of MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.0
Percentage of Assets maa:MidAmericaApartmentCommunitiesIncShareholdersEquity maa:NoncontrollingInterestOperatingPartnership0.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value249148180254229160159253213154133237596742525763374345523127394125
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues57.034.842.560.155.438.438.460.952.538.633.559.743.550.231.640.345.050.931.636.639.447.329.226.239.442.525.8

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value24914818025422916015925321315413323721115210523118313894151134104
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues57.034.842.560.155.438.438.460.952.538.633.559.754.20.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner57.034.842.560.155.438.438.460.952.538.633.559.754.239.627.560.248.036.430.954.549.338.7

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-20.039-112.499-191.579-95.317-107.846-89.989-7.592-89.855-87.942-52.884-78.592-66.396-23.136-19.988-51.241-18.241-197.743-79.197-34.042-120.975-94.615-179.283-47.287-66.007-136.642-83.12231
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-4.6-26.5-45.2-22.5-26.1-21.5-1.8-21.6-21.6-13.2-19.7-16.7-17.0-14.9-38.4-13.9-155.6-63.9-28.5-102.9-81.7-162.3-44.1-63.8-135.4-84.532.3

us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-20.039-112.499-191.579-95.317-107.846-89.989-7.592-89.855-87.942-52.884-78.592-66.396-174.697-46.665-51.119-42.937-98.704-90.675-494.382-30.722-119.466-65.917
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues-4.6-26.5-45.2-22.5-26.1-21.5-1.8-21.6-21.6-13.2-19.7-16.7-44.80.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner-4.6-26.5-45.2-22.5-26.1-21.5-1.8-21.6-21.6-13.2-19.7-16.7-44.8-12.1-13.4-11.2-25.8-23.9-160.9-11.1-43.9-24.5

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-229.539-27.85219-166.958-134.62-92.107-124.431-178.218-127.55-94.08-82.371-152.058136-46.7098.273-39.052131-3.312-19.289110609217-15.26817134-38.123
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-52.5-6.64.6-39.5-32.6-22.0-29.9-42.9-31.3-23.5-20.7-38.399.7-34.86.2-29.7103.6-2.7-16.194.452.183.916.1-14.8170.234.8-39.1

us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-229.539-27.85219-166.958-134.62-92.107-124.431-178.218-127.55-94.08-82.371-152.058-57.911-112.796-91.387-180.191-79.368-46.918405-118.746-16.57-47.543
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues-52.5-6.64.6-39.5-32.6-22.0-29.9-42.9-31.3-23.5-20.7-38.3-14.80.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner-52.5-6.64.6-39.5-32.6-22.0-29.9-42.9-31.3-23.5-20.7-38.3-14.8-29.2-23.9-46.9-20.7-12.4131.9-42.9-6.1-17.7

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.3717.768.026-8.005-13.453-21.49427-15.002-1.7037.714-27.72718
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.11.81.9-1.9-3.3-5.16.7-3.6-0.41.9-7.04.7

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-0.3717.768.026-8.005-13.453-21.49427-15.002-1.7037.714-27.72718
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-0.11.81.9-1.9-3.3-5.16.7-3.6-0.41.9-7.04.7
Percentage of Revenues us-gaap:LimitedPartner-0.11.81.9-1.9-3.3-5.16.7-3.6-0.41.9-7.04.7

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value132131129127127126125124124123121124333334343332313130282828272525
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationDepletionAndAmortization us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value13213112912712712612512412412312112412312111911812613095767575
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value249148180254229160159253213154133237596742525763374345523127394125
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues57.034.842.560.155.438.438.460.952.538.633.559.743.550.231.640.345.050.931.636.639.447.329.226.239.442.525.8

us-gaap:NetCashProvidedByUsedInOperatingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value24914818025422916015925321315413323721115210523118313894151134104
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues57.034.842.560.155.438.438.460.952.538.633.559.754.20.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner57.034.842.560.155.438.438.460.952.538.633.559.754.239.627.560.248.036.430.954.549.338.7

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value2164783597536149786163615259144459212230282318137.4288.8446.946.7496.669.412
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues49.511.119.714.218.28.835.918.915.215.915.413.315.36.132.544.115.917.024.322.720.016.011.96.78.26.76.76.89.7

us-gaap:NetIncomeLoss us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2224761763780636553
Percentage of NetIncomeLoss103.0101.6102.0102.3101.0102.4102.1102.2101.9
Percentage of Revenues51.011.314.418.68.919.415.516.213.5
Percentage of Revenues us-gaap:LimitedPartner51.011.314.418.68.919.415.516.213.5

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value22348866277371558164656354614661222332292519147.689.1557.1656.9736.8889.849
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues51.211.520.414.718.89.137.219.615.716.416.013.815.933.845.516.517.725.223.821.017.012.57.08.56.96.97.010.1

us-gaap:ProfitLoss us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value223488662773715581646563546150128118504342884745459614364
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues51.211.520.414.718.89.137.219.615.716.416.013.815.90.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner51.211.520.414.718.89.137.219.615.716.416.013.815.913.233.430.913.111.513.732.117.517.017.237.055.625.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value3.8435.3691.7974.3822.8625.2882.1043.3133.4524.7852.5672.890.5580.5410.630.5030.4990.4170.8141.0742.7590.8420.8441.098
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3.8435.3691.7974.3822.8625.28825-19.7873.4524.7852.5672.892.9634.0242.1392.8132.63.0185.5092.0192.0731.885
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.01197.9-597.3100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-20.039-112.499-191.579-95.317-107.846-89.989-7.592-89.855-87.942-52.884-78.592-66.396-23.136-19.988-51.241-18.241-197.743-79.197-34.042-120.975-94.615-179.283-47.287-66.007-136.642-83.12231
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-4.6-26.5-45.2-22.5-26.1-21.5-1.8-21.6-21.6-13.2-19.7-16.7-17.0-14.9-38.4-13.9-155.6-63.9-28.5-102.9-81.7-162.3-44.1-63.8-135.4-84.532.3

us-gaap:NetCashProvidedByUsedInInvestingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-20.039-112.499-191.579-95.317-107.846-89.989-7.592-89.855-87.942-52.884-78.592-66.396-174.697-46.665-51.119-42.937-98.704-90.675-494.382-30.722-119.466-65.917
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues-4.6-26.5-45.2-22.5-26.1-21.5-1.8-21.6-21.6-13.2-19.7-16.7-44.80.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner-4.6-26.5-45.2-22.5-26.1-21.5-1.8-21.6-21.6-13.2-19.7-16.7-44.8-12.1-13.4-11.2-25.8-23.9-160.9-11.1-43.9-24.5

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-229.539-27.85219-166.958-134.62-92.107-124.431-178.218-127.55-94.08-82.371-152.058136-46.7098.273-39.052131-3.312-19.289110609217-15.26817134-38.123
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-52.5-6.64.6-39.5-32.6-22.0-29.9-42.9-31.3-23.5-20.7-38.399.7-34.86.2-29.7103.6-2.7-16.194.452.183.916.1-14.8170.234.8-39.1

us-gaap:NetCashProvidedByUsedInFinancingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-229.539-27.85219-166.958-134.62-92.107-124.431-178.218-127.55-94.08-82.371-152.058-57.911-112.796-91.387-180.191-79.368-46.918405-118.746-16.57-47.543
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues-52.5-6.64.6-39.5-32.6-22.0-29.9-42.9-31.3-23.5-20.7-38.3-14.80.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:LimitedPartner-52.5-6.64.6-39.5-32.6-22.0-29.9-42.9-31.3-23.5-20.7-38.3-14.8-29.2-23.9-46.9-20.7-12.4131.9-42.9-6.1-17.7

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value117117114114114114109109109109105104292929272727252323222220191817
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value121121118118118118113113113113108108
Percentage of PaymentsOfDividendsCommonStock103.5103.5103.7103.4103.5103.6103.8103.6103.6103.6103.6103.4

Debt Instrument Interest Rate Stated Percentage

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

us-gaap:DebtInstrumentInterestRateStatedPercentage

maa:MAALP, maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Debt
Period End2020-08-31
Value1.7
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations maa:MAALP maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne us-gaap:UnsecuredDebt0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Debt
Period End2020-08-31
Value1.7
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne us-gaap:UnsecuredDebt0.0

maa:AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic

maa:AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2154682587435148776062605158
Percentage of AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2224785617636153806364
Percentage of AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersBasic103.4103.6103.6103.6103.6103.7103.6103.6103.7103.7

maa:AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted

maa:AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2154682587435148776062605158
Percentage of AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Adjusted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value2224785617637154806365
Percentage of AdjustedIncomeLossFromContinuingOperationsAvailableForCommonShareholdersDiluted103.4103.6103.6103.6103.6103.7103.6103.6103.6103.7

maa:AdjustmentForLimitedPartnersCapitalAtRedemptionValue us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:AdjustmentForLimitedPartnersCapitalAtRedemptionValue

maa:MAALP, maa:GeneralPartnersCapitalAccount


Adjustment
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value765000.0-126000.061000.0211000.0-56000.0-77000.085000.053000.0139000.0
Percentage of AdjustmentForLimitedPartnersCapitalAtRedemptionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:MAALP, us-gaap:LimitedPartner


Adjustment
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-765000.0126000.0-61000.0-211000.056000.077000.0-85000.0-53000.0-139000.0
Percentage of AdjustmentForLimitedPartnersCapitalAtRedemptionValue-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

maa:AmortizationUnearnedCompensation us-gaap:ConsolidatedEntities

maa:AmortizationUnearnedCompensation

maa:MAALP


Amortization
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value4.1515.9934.382.8645.2893.3133.4524.7852.89
Percentage of AmortizationUnearnedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:AmortizationUnearnedCompensation us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:MAALP, maa:GeneralPartnersCapitalAccount


Amortization
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value4.1515.9934.382.8645.2893.3133.4524.7852.89
Percentage of AmortizationUnearnedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:AmortizationUnearnedCompensation us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Amortization
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value4.1515.9934.382.8645.2893.3133.4524.7852.89
Percentage of AmortizationUnearnedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:AmortizationUnearnedCompensation us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AdditionalPaidInCapital


Amortization
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value4.1515.9934.382.8645.2893.3133.4524.7852.89
Percentage of AmortizationUnearnedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:BasicEarningsPerUnit us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:BasicEarningsPerUnit

us-gaap:LimitedPartner


Basic
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
Value1.880.40.720.520.650.311.30.680.530.550.530.460.520.421.081.00.42
Percentage of BasicEarningsPerUnit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:DilutedEarningsPerUnit us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:DilutedEarningsPerUnit

us-gaap:LimitedPartner


Diluted
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
Value1.880.40.720.520.650.311.30.680.530.550.530.460.520.421.081.00.42
Percentage of DilutedEarningsPerUnit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:Distributions us-gaap:ConsolidatedEntities

maa:Distributions

maa:MAALP


Distributionsus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value121121118118118113113113108
Percentage of Distributions100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:Distributions us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:MAALP, maa:GeneralPartnersCapitalAccount


Distributionsus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value117117114114114109109109105
Percentage of Distributions97.096.696.796.696.696.696.596.596.7

maa:MAALP, us-gaap:LimitedPartner


Distributionsus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value3.6964.1563.8664.0594.0593.9123.9253.9413.581
Percentage of Distributions3.03.43.33.43.43.43.53.53.3

maa:EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement us-gaap:ConsolidatedEntities

maa:EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement

maa:MAALP


Effect
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-3031000.0-2158000.0-155000.0-1297000.03111000.0-1269000.0-835000.0-1351000.048000.0
Percentage of EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:MAALP, maa:GeneralPartnersCapitalAccount


Effect
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-3031000.0-2158000.0-155000.0-1297000.03111000.0-1269000.0-835000.0-1351000.048000.0
Percentage of EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Effect
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-3031000.0-2158000.0-155000.0-1297000.03111000.0-1269000.0-835000.0-1351000.048000.0
Percentage of EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AccumulatedDistributionsInExcessOfNetIncome


Effect
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-3031000.0-2158000.0-155000.0-1297000.03111000.0-1269000.0-835000.0-1351000.048000.0
Percentage of EffectOnRetainedEarningsAccumulatedDeficitDueToFairValueOptionAndMeasurement100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:GainLossOnSaleOfNonDepreciableRealEstateAssets

maa:GainLossOnSaleOfNonDepreciableRealEstateAssets


Gain
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.0320.0291.3660.005-0.3762.7870.00.2978.9630.6620.9592.761
Percentage of GainLossOnSaleOfNonDepreciableRealEstateAssets100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

maa:GainLossOnSaleOfNonDepreciableRealEstateAssets us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Gain
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.0320.0291.3660.005-0.3762.7870.00.2978.9630.6620.9592.761
Percentage of GainLossOnSaleOfNonDepreciableRealEstateAssets100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

maa:GainonSaleofNonDepreciableAssets

maa:GainonSaleofNonDepreciableAssets


Gainon
Period End2020-12-312020-09-302019-12-31
Value0.0291.3662.787
Percentage of GainonSaleofNonDepreciableAssets100.0100.0100.0

maa:GainonSaleofNonDepreciableAssets us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Gainon
Period End2020-12-312020-09-302019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0291.3662.7878.9630.6620.9592.7610.15-0.021-0.0060.0480.0-4.3410.00.5431.627
Percentage of GainonSaleofNonDepreciableAssets100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0

maa:GeneralPartnershipUnitsIssuedInExchangeForLimitedPartnershipUnits us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:GeneralPartnershipUnitsIssuedInExchangeForLimitedPartnershipUnits

maa:MAALP, maa:GeneralPartnersCapitalAccount


General
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value210.2320.0210.00.450.8360.8210.3361.165
Percentage of GeneralPartnershipUnitsIssuedInExchangeForLimitedPartnershipUnits100.0100.0100.00.0100.0100.0100.0100.0100.0

maa:MAALP, us-gaap:LimitedPartner


General
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-21.932-0.232-0.0210.0-0.45-0.836-0.821-0.336-1.165
Percentage of GeneralPartnershipUnitsIssuedInExchangeForLimitedPartnershipUnits-100.0-100.0-100.00.0-100.0-100.0-100.0-100.0-100.0

maa:IncomeFromContinuingOperationsAllocatedToUnvestedRestrictedShares us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:IncomeFromContinuingOperationsAllocatedToUnvestedRestrictedShares

us-gaap:LimitedPartner


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-234000.0-54000.0-109000.0-78000.0-100000.0-50000.0-217000.0-118000.0-96000.0-87000.0-80000.0-69000.0-78000.0
Percentage of IncomeFromContinuingOperationsAllocatedToUnvestedRestrictedShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:IncomeLossFromContinuingOperationsAllocatedToUnvestedRestrictedShares

maa:IncomeLossFromContinuingOperationsAllocatedToUnvestedRestrictedShares


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value234000.054000.0109000.078000.0100000.050000.0217000.0118000.096000.087000.080000.069000.078000.0
Percentage of IncomeLossFromContinuingOperationsAllocatedToUnvestedRestrictedShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments

maa:IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2234885617737154816365625461
Percentage of IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2234885617737154816365625461
Percentage of IncomeLossFromContinuingOperationsBeforeEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:IncomefromContinuingOperationsAttributabletoNoncontrollingInterest

maa:IncomefromContinuingOperationsAttributabletoNoncontrollingInterest


Incomefrom
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-7.397-1.671-2.957-2.126-2.666-1.304-20.1432.8142.224-2.298-14.0111.9132.174
Percentage of IncomefromContinuingOperationsAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:IncomefromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterest

maa:IncomefromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterest


Incomefrom
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2234886627737155816465635461
Percentage of IncomefromContinuingOperationsIncludingPortionAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:NetIncomeAttributabletoNoncontrollingInterest us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:NetIncomeAttributabletoNoncontrollingInterest

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, maa:NoncontrollingInterestOperatingPartnership


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value7.3971.6712.1262.6661.3042.8142.2242.2981.913
Percentage of NetIncomeAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:NetIncomeAttributabletoParent us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:NetIncomeAttributabletoParent

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AccumulatedDistributionsInExcessOfNetIncome


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2164759753678616352
Percentage of NetIncomeAttributabletoParent100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:NetIncomeAvailableForCommonUnitholders us-gaap:ConsolidatedEntities

maa:NetIncomeAvailableForCommonUnitholders

maa:MAALP


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2234862773781646554
Percentage of NetIncomeAvailableForCommonUnitholders100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:NetIncomeIncludingPortionAttributabletoNoncontrollingInterest us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:NetIncomeIncludingPortionAttributabletoNoncontrollingInterest

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2234862773781646554
Percentage of NetIncomeIncludingPortionAttributabletoNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:NumberOfSharesRemainingForIssuance us-gaap:SubsidiarySaleOfStock

maa:NumberOfSharesRemainingForIssuance

maa:AtTheMarketOffering


Number
Period End2021-06-302021-03-312020-12-31
Value03900000.00
Percentage of NumberOfSharesRemainingForIssuance0.0100.00.0

maa:OperatingCostsAndExpensesExcludingDepreciationAndAmortization

maa:OperatingCostsAndExpensesExcludingDepreciationAndAmortization


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value10195951059591911009689919792
Percentage of OperatingCostsAndExpensesExcludingDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:OperatingCostsAndExpensesExcludingDepreciationAndAmortization us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value10195951059591911009689919792
Percentage of OperatingCostsAndExpensesExcludingDepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:OperatingIncomeBeforeDepreciation

maa:OperatingIncomeBeforeDepreciation


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2682622632532552642672562532512512422411478081807974736968646261585656
Percentage of OperatingIncomeBeforeDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:OperatingIncomeBeforeDepreciation us-gaap:StatementBusinessSegments

maa:NonSameStoreAndOther


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value119.8071514121519171513151410741212111513129.635119.2477.3854.1884.6163.5642.891
Percentage of OperatingIncomeBeforeDepreciation4.13.75.75.85.05.97.27.06.35.56.26.04.550.315.415.614.420.018.116.913.917.214.311.76.87.86.45.2

maa:SameStore


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value257252248238242249247238237237235227230
Percentage of OperatingIncomeBeforeDepreciation95.996.394.394.295.094.192.893.093.794.593.894.095.5

maa:PaymentsToAcquireRealEstateAndOtherAssets

maa:PaymentsToAcquireRealEstateAndOtherAssets


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value510.00.05.004823.2646.00113162.226-0.0055732-2.908218960.0100761553063
Percentage of PaymentsToAcquireRealEstateAndOtherAssets100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

maa:PaymentsToAcquireRealEstateAndOtherAssets us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value510.00.05.004823.2646.00113162.2261100.0720.9570.062761316861
Percentage of PaymentsToAcquireRealEstateAndOtherAssets100.00.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

maa:PercentageOfReimbursableRevenueFromLeasingOfApartmentHomes

maa:PercentageOfReimbursableRevenueFromLeasingOfApartmentHomes


Percentage
Period End2021-06-302021-03-312020-12-31
Value06.00
Percentage of PercentageOfReimbursableRevenueFromLeasingOfApartmentHomes0.0100.00.0

maa:PercentageOfRentalRevenueAndOtherIncomeFromLeasingOfApartmentHomes

maa:PercentageOfRentalRevenueAndOtherIncomeFromLeasingOfApartmentHomes


Percentage
Period End2021-06-302021-03-312020-12-31
Value093.00
Percentage of PercentageOfRentalRevenueAndOtherIncomeFromLeasingOfApartmentHomes0.0100.00.0

maa:PercentageofRentalRevenueandOtherIncomeFromNonleasingActivities

maa:PercentageofRentalRevenueandOtherIncomeFromNonleasingActivities


Percentageof
Period End2021-06-302021-03-312020-12-31
Value01.00
Percentage of PercentageofRentalRevenueandOtherIncomeFromNonleasingActivities0.0100.00.0

maa:PreferredUnitDividendsIncomeStatementImpact us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:PreferredUnitDividendsIncomeStatementImpact

us-gaap:LimitedPartner


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0-307000.00000000
Percentage of PreferredUnitDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.0

maa:PropertyOperatingExpenses

maa:PropertyOperatingExpenses


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value300293289297284279275284278272268279271
Percentage of PropertyOperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:PropertyOperatingExpenses us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value300293289297284279275284278272268279271
Percentage of PropertyOperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:UnitsIssuedDuringPeriodValueNewIssuesNet us-gaap:ConsolidatedEntities

maa:UnitsIssuedDuringPeriodValueNewIssuesNet

maa:MAALP


Units
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-467000.0134000.033000.0-416000.039000.0140000.0-519000.01129000.0-35000.0
Percentage of UnitsIssuedDuringPeriodValueNewIssuesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:UnitsIssuedDuringPeriodValueNewIssuesNet us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:MAALP, maa:GeneralPartnersCapitalAccount


Units
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-467000.0134000.033000.0-416000.039000.0140000.0-519000.01129000.0-35000.0
Percentage of UnitsIssuedDuringPeriodValueNewIssuesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:UnitsIssuedDuringPeriodValueUnitOptionsExercised us-gaap:ConsolidatedEntities

maa:UnitsIssuedDuringPeriodValueUnitOptionsExercised

maa:MAALP


Units
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.01.4660.00.00.071-0.2041.0320.2080.291
Percentage of UnitsIssuedDuringPeriodValueUnitOptionsExercised0.0100.00.00.0100.0100.0100.0100.0100.0

maa:UnitsIssuedDuringPeriodValueUnitOptionsExercised us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:MAALP, maa:GeneralPartnersCapitalAccount


Units
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.01.4660.00.00.071-0.2041.0320.2080.291
Percentage of UnitsIssuedDuringPeriodValueUnitOptionsExercised0.0100.00.00.0100.0100.0100.0100.0100.0

maa:UnitsRepurchasedAndRetiredDuringPeriodValue us-gaap:ConsolidatedEntities

maa:UnitsRepurchasedAndRetiredDuringPeriodValue

maa:MAALP


Units
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value7313000.01730000.003930000.01727000.00701000.03023000.0
Percentage of UnitsRepurchasedAndRetiredDuringPeriodValue100.0100.00.0100.0100.00.0100.0100.0

maa:UnitsRepurchasedAndRetiredDuringPeriodValue us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:MAALP, maa:GeneralPartnersCapitalAccount


Units
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value7313000.01730000.003930000.01727000.00701000.03023000.0
Percentage of UnitsRepurchasedAndRetiredDuringPeriodValue100.0100.00.0100.0100.00.0100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfDebtDiscountPremium


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.331.3441.3651.3051.1331.1571.0721.2381.7211.7471.453-0.28-0.225-0.226-0.225-0.226-0.09-0.09-0.09-0.270.09-0.09-0.09-0.270.09
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1.331.3441.3651.3051.1331.1571.0721.2381.7211.7479.308-1.349-1.4-1.56917-2.012-9.173.14717-2.45-7.7522.656
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStockDividendsPerShareDeclared us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:CommonStockDividendsPerShareDeclared

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Common
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value1.0251.0251.01.01.00.960.960.960.9225
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConstructionInProgressExpendituresIncurredButNotYetPaid

us-gaap:ConstructionInProgressExpendituresIncurredButNotYetPaid


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-2.0132-21.81822-6.88725-5.354-6.4115.90815-10.895-2.633-2.9360.07.126-2.943-0.426-3.20910-0.2652.089-0.6927.4670.9740.026-3.3125.451
Percentage of ConstructionInProgressExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConstructionInProgressExpendituresIncurredButNotYetPaid us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-2.0132-21.81822-6.88725-5.354-6.4115.90815-10.895-2.6337.46914-7.935-3.573-2.452122-2.039-1.52612
Percentage of ConstructionInProgressExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConversionOfStockAmountConverted1

us-gaap:ConversionOfStockAmountConverted1


Conversion
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value210.2320.0310.0210.00.450.3730.8360.8210.3360.1611.1640.1060.0010.4430.7870.1562.4880.0280.0650.1260.8072.0710.0470.029
Percentage of ConversionOfStockAmountConverted1100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1 us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentBasisSpreadOnVariableRate1

srt:Maximum, maa:A1BillionUnsecuredRevolvingCreditFacility, us-gaap:UnsecuredDebt


Debt
Period End2021-03-312020-03-31
Value1.450.0145
Percentage of DebtInstrumentBasisSpreadOnVariableRate1100.0100.0

srt:Minimum, maa:A1BillionUnsecuredRevolvingCreditFacility, us-gaap:UnsecuredDebt


Debt
Period End2021-03-312020-03-31
Value0.750.0075
Percentage of DebtInstrumentBasisSpreadOnVariableRate151.751.7

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

us-gaap:DebtInstrumentRedemptionPricePercentage

maa:MAALP, maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Debt
Period End2020-08-31
Value99.465
Percentage of DebtInstrumentRedemptionPricePercentage100.0

us-gaap:DebtInstrumentRedemptionPricePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Debt
Period End2020-08-31
Value99.465
Percentage of DebtInstrumentRedemptionPricePercentage100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1311311291271271261251241231221211241229033323333313130302927272626
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value13113112912712712612512412312212112412212011911712612995767575
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DerivativeGainLossOnDerivativeNet


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value13-15.108171.34211-27.638-1.706154.594-0.524
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:Nondesignated, us-gaap:InterestExpense


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value13-15.108171.34211-27.638-1.706154.594-0.524-2.292-0.4332.793-2.644-5.8274.107-0.6332.3530.00.00.00.00.00.00.0-0.003-0.008-0.01-0.059-0.069-0.008-0.0050.01-0.013
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value13-15.108171.34211-27.638-1.706154.594-0.524
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred

us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense


Derivative
Period End2021-06-302021-03-312020-12-31
Value01100000.00
Percentage of DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimatedNetAmountToBeTransferred0.0100.00.0

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-0.278-0.279-0.278-0.279-0.278-0.2530.0130.4110.5780.7450.6420.5480.555-0.1930.154-0.0330.2460.672-1.0051.0421.1311.186-1.4741.6071.7912.192-21.1842.5893.0853.725-28.4683.6213.932
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion

us-gaap:DesignatedAsHedgingInstrument, us-gaap:InterestExpense


Derivative
Period End2021-06-302021-03-31
Value-0.412
Percentage of DerivativeInstrumentsLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortion100.0100.0

us-gaap:DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

us-gaap:DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit

maa:MAALP, us-gaap:LimitedPartner


Distribution
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value1.0251.0251.01.01.00.960.960.960.9225
Percentage of DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:DividendsCommonStock

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value117117114114114109109109105
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStock us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AccumulatedDistributionsInExcessOfNetIncome


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value117117114114114109109109105
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStockCash

us-gaap:DividendsPreferredStockCash


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302016-06-302016-03-31
Value922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.000
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:DividendsPreferredStockCash us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Dividends
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
Value922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0922000.0-922000.0-922000.0922000.0922000.0-922000.0-922000.0-922000.0-922000.0-922000.0-924000.0000
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0-100.0-100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:GainLossOnDispositionOfAssets

us-gaap:GainLossOnDispositionOfAssets


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0160.020.002-0.029801.00.0-0.013-0.018-0.023
Percentage of GainLossOnDispositionOfAssets100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0160.020.002-0.02981-0.9740.0-0.013-0.018-0.0230.0020.068580.1280.073-128.969471.578-0.755
Percentage of GainLossOnDispositionOfAssets100.0100.0100.0100.0102.5-97.40.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1340.0160.020.002-0.029801.00.0-0.013-0.018-0.0230.002
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Gain
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1340.0160.020.002-0.029801.00.0-0.013-0.018-0.0230.0020.068580.274-0.07331470.0680.755
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value325000.0332000.0348000.0428000.0318000.0407000.0444000.0378000.0435000.0397000.0576000.0402000.0356000.060000.047000.054000.0-53000.0-72000.0-67000.0-31000.0-63000.0-107000.0-178000.0-245000.0-293000.0-282000.0-298000.0-276000.0
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value325000.0332000.0348000.0428000.0318000.0407000.0444000.0378000.0435000.0397000.0576000.0402000.0356000.0498000.0349000.0335000.0329000.0357000.0214000.00-101000.0128000.03000.0-1000.0-23000.019000.0
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InterestCostsCapitalized

us-gaap:InterestCostsCapitalized


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value2783000.02550000.02129000.01764000.01628000.01391000.01042000.0754000.0705000.0388000.0407000.0357000.0246000.0424000.0448000.0474000.0555000.0651000.0638000.0436000.0261000.0292000.0167000.0
Percentage of InterestCostsCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestCostsCapitalized us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2783000.02550000.02129000.01764000.01628000.01391000.01042000.0754000.0705000.0388000.0407000.0357000.0488000.0795000.01354000.01657000.02207000.02020000.0978000.0387000.0328000.0380000.0
Percentage of InterestCostsCapitalized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:InvestmentCompanyInvestmentIncomeLossPerShare us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:InvestmentCompanyInvestmentIncomeLossPerShare

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Investment
Period End2021-06-302020-06-30
Value1.0251.0
Percentage of InvestmentCompanyInvestmentIncomeLossPerShare100.0100.0

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest us-gaap:Ownership

us-gaap:LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest

maa:MAALP


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.396.6095.63400.96600.00100.9650
Percentage of LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest100.0100.00.0100.00.0100.00.0100.00.0100.00.0

us-gaap:MinorityInterestPeriodIncreaseDecrease us-gaap:ConsolidatedEntities

us-gaap:MinorityInterestPeriodIncreaseDecrease

maa:MAALP


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value6.1310.6330.2620.2010.4010.9550.492.86
Percentage of MinorityInterestPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MinorityInterestPeriodIncreaseDecrease us-gaap:ConsolidatedEntities, us-gaap:StatementEquityComponents

maa:MAALP, us-gaap:NoncontrollingInterest


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value6.1310.6330.2620.2010.4010.9550.492.86
Percentage of MinorityInterestPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MinorityInterestPeriodIncreaseDecrease us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, maa:NoncontrollingInterestOperatingPartnership


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value-0.8160.116-0.071-0.220.0470.2720.1270.06-0.266
Percentage of MinorityInterestPeriodIncreaseDecrease-13.318.3-27.1-109.511.728.525.92.10.0

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AdditionalPaidInCapital


Minority
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.816-0.1160.0710.22-0.047-0.272-0.127-0.060.266
Percentage of MinorityInterestPeriodIncreaseDecrease13.3-18.327.1109.5-11.7-28.5-25.9-2.10.0

us-gaap:NetIncomeLossAllocatedToGeneralPartners us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

us-gaap:NetIncomeLossAllocatedToGeneralPartners

maa:MAALP, maa:GeneralPartnersCapitalAccount


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value2154658743577606251
Percentage of NetIncomeLossAllocatedToGeneralPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossAllocatedToLimitedPartners us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

us-gaap:NetIncomeLossAllocatedToLimitedPartners

maa:MAALP, us-gaap:LimitedPartner


Net
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value7.3971.6712.1262.6661.3042.8142.2242.2981.913
Percentage of NetIncomeLossAllocatedToLimitedPartners100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-278000.0-279000.0-278000.0-279000.0-278000.0-253000.013000.0411000.0578000.0745000.0642000.0548000.0555000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-278000.0-279000.0-278000.0-279000.0-278000.0-253000.013000.0411000.0578000.0745000.0642000.0548000.0555000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value131213121114131313131211119.169.0988.865108.5818.4598.2797.9558.6728.3877.7127.87.3786.7075.854
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value13121312111413131313121111128.8171310108.9477.046.7716.956
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value36-54.394-21.9276131-38.495-41.1464321-32.468-53.30457
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingActivitiesCashFlowStatement us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value36-54.394-21.9276131-38.495-41.1464321-32.468-53.30457
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherOperatingIncome us-gaap:StatementBusinessSegments

us-gaap:OtherOperatingIncome

maa:NonSameStoreAndOther


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.1360.1340.0930.0360.7670.1370.1790.172-0.3320.3320.353
Percentage of OtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:SameStore


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2.363.0443.3132.6552.2383.2223.6323.0662.3983.1673.349
Percentage of OtherOperatingIncome1735.32271.63562.47375.0291.82351.82029.11782.6-722.3953.9948.7

us-gaap:OtherOperatingIncomeExpenseNet us-gaap:StatementBusinessSegments

us-gaap:OtherOperatingIncomeExpenseNet

maa:NonSameStoreAndOther


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value407000.0243000.043000.0-2000.0
Percentage of OtherOperatingIncomeExpenseNet100.0100.0100.0100.0

maa:SameStore


Other
Period End2021-06-302021-03-312020-06-302020-03-31
Value3355000.02981000.03362000.02694000.0
Percentage of OtherOperatingIncomeExpenseNet824.31226.77818.6-134700.0

us-gaap:PartnersCapitalAccountContributions us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PartnersCapitalAccountContributions

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Partners
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value6131000.0633000.0262000.0201000.0401000.0955000.0490000.02860000.0
Percentage of PartnersCapitalAccountContributions100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapitalAccountContributions us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, maa:NoncontrollingInterestsConsolidatedRealEstateEntities


Partners
Period End2021-06-302020-06-30
Value6131000.0201000.0
Percentage of PartnersCapitalAccountContributions100.0100.0

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:NoncontrollingInterest


Partners
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value633000.0262000.0201000.0401000.0955000.0490000.02860000.0
Percentage of PartnersCapitalAccountContributions100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForCapitalImprovements

us-gaap:PaymentsForCapitalImprovements


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value134113138961078483868053626612138.7011010141213323.5892.416-24.69272.1351.417
Percentage of PaymentsForCapitalImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForCapitalImprovements us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1341131389610784838680536266745126131351515202816
Percentage of PaymentsForCapitalImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PaymentsOfDividendsMinorityInterest

us-gaap:PaymentsOfDividendsMinorityInterest


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value4.1434.1594.253.8674.0594.0674.1263.9273.9393.9473.7933.6011.1831.1871.2041.1731.2161.2791.281.2191.2611.2971.4221.41.3571.461.467
Percentage of PaymentsOfDividendsMinorityInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsOfFinancingCosts


Payments
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.0214.1652.7442.4824.3434.7052.3190.272.2290.3060.120.0391.580.61.3971.9910.951.280.420.1231.3911.354.381
Percentage of PaymentsOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Payments
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.0214.1652.7442.4824.3434.7052.3190.273.4710.00.0030.0985.2570.02.2540.00.0020.139
Percentage of PaymentsOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PaymentsToAcquireEquityMethodInvestments

us-gaap:PaymentsToAcquireEquityMethodInvestments


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value1.8991.7250.8250.90.8911.81.4050.750.00.1670.0160.0140.1310.0220.0510.1230.0140.0041.3692.3913.7330.1125.894
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireEquityMethodInvestments us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value1.8991.7250.8250.90.8911.81.4050.75
Percentage of PaymentsToAcquireEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockDividendRatePerDollarAmount

us-gaap:PreferredStockDividendRatePerDollarAmount


Preferred
Period End2021-06-302021-03-312020-12-31
Value04.250
Percentage of PreferredStockDividendRatePerDollarAmount0.0100.00.0

us-gaap:PreferredStockDividendRatePercentage

us-gaap:PreferredStockDividendRatePercentage


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value08.508.41500.08500
Percentage of PreferredStockDividendRatePercentage0.0100.00.0100.00.0100.00.00.0

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

us-gaap:ProceedsFromDebtNetOfIssuanceCosts

maa:MAALP, maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Proceeds
Period End2020-08-31
Value444
Percentage of ProceedsFromDebtNetOfIssuanceCosts100.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Proceeds
Period End2020-08-31
Value444
Percentage of ProceedsFromDebtNetOfIssuanceCosts100.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-31
Value278000.0114000.0142000.0123000.0142000.0181000.0141000.043000.0
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-03-31
Value278000.0114000.0142000.0123000.0142000.0181000.0141000.043000.00
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value10.065501300.020400145760425
Percentage of ProceedsFromLinesOfCredit100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value10.065501300.020400145760425205150225205220155
Percentage of ProceedsFromLinesOfCredit100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.00.00.00.0

us-gaap:ProceedsFromNotesPayable

us-gaap:ProceedsFromNotesPayable


Proceeds
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.02992690.04904720.00.00.00.054121100500.0135128220.01180.019
Percentage of ProceedsFromNotesPayable0.0100.0100.00.0100.0100.00.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.00.0100.00.0100.0

us-gaap:ProceedsFromNotesPayable us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Proceeds
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-30
Value0.02992690.04904720.03970.00.00.03000.0
Percentage of ProceedsFromNotesPayable0.0100.0100.00.0100.0100.00.00.00.00.00.00.00.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1.7980.6252.9920.507-3.517-1.108120.9890.9131.230.0310.343
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.7980.6252.9920.507-3.517-1.108120.9890.9131.230.0310.3430.237-2.091
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ProceedsFromRepaymentsOfCommercialPaper

us-gaap:ProceedsFromRepaymentsOfCommercialPaper


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-105.0213137-55.090-70.0-130.0-167.0
Percentage of ProceedsFromRepaymentsOfCommercialPaper100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfCommercialPaper us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value-105.0213137-55.090-70.0-130.0-167.0
Percentage of ProceedsFromRepaymentsOfCommercialPaper100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1600.8980.8972.6180.1350.5251581.3440.758131.0642.76745730.0761245222912100.320.01823
Percentage of ProceedsFromSaleOfRealEstateHeldforinvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Proceeds
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
Value1600.8980.8972.6180.1350.5251581.3440.758131.0642.767105.8697881.5510.01091495.5232
Percentage of ProceedsFromSaleOfRealEstateHeldforinvestment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.01.50.00.00.1-0.21.00.20.3
Percentage of ProceedsFromStockOptionsExercised0.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:RealEstateTaxesAndInsurance

us-gaap:RealEstateTaxesAndInsurance


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value67666464616158595759555755161615141414131212121211111111
Percentage of RealEstateTaxesAndInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateTaxesAndInsurance us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value67666464616158595759555755555152545338343435
Percentage of RealEstateTaxesAndInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value10.065150300.020475610670165
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLinesOfCredit us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value10.065150300.02047561067016554511014511563075
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.00.00.00.0

us-gaap:RepaymentsOfNotesPayable

us-gaap:RepaymentsOfNotesPayable


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value0.3271190.8864361.7431.741881643011.8475323025.8961.4291.371.184100.950.807-88.4890.7721000.6710.920.2830.4480.273
Percentage of RepaymentsOfNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfNotesPayable us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Repayments
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
Value0.3271190.8864361.7431.741881643011.8475323022.5841681661591831771.76735
Percentage of RepaymentsOfNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RepaymentsOfSecuredDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfSecuredDebt

us-gaap:SecuredDebt, maa:EightPropertyMortgage


Repayments
Period End2021-02-10
Value118
Percentage of RepaymentsOfSecuredDebt100.0

us-gaap:SecuredDebt, maa:MaturingJulyTwentyTwentyFourPropertyMortgage


Repayments
Period End2020-07-31
Value72
Percentage of RepaymentsOfSecuredDebt0.0

us-gaap:SecuredDebt, maa:MaturingJulyTwentyTwentyThreePropertyMortgage


Repayments
Period End2021-02-282020-07-31
Value11863
Percentage of RepaymentsOfSecuredDebt0.00.0

us-gaap:StockIssuedDuringPeriodValueConversionOfUnits us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueConversionOfUnits

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, maa:NoncontrollingInterestOperatingPartnership


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value-21.932-0.232-0.0210.0-0.45-0.836-0.821-0.336
Percentage of StockIssuedDuringPeriodValueConversionOfUnits100.0100.0100.00.0100.0100.0100.0100.0

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value210.2320.0210.00.450.8360.8210.336
Percentage of StockIssuedDuringPeriodValueConversionOfUnits-100.0-100.0-100.00.0-100.0-100.0-100.0-100.0

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:CommonStock


Stock
Period End2021-06-30
Value0.004
Percentage of StockIssuedDuringPeriodValueConversionOfUnits-0.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.01.4660.00.00.071-0.2041.0320.2080.291
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised0.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.01.4660.00.00.071-0.2041.0320.2080.291
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised0.0100.00.00.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value7.3131.730.03.931.7270.00.7013.023
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.00.0100.0100.00.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value7.3131.730.03.931.7270.00.7013.023
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.00.0100.0100.00.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value318000.0312000.0252000.0234000.0383000.0260000.0249000.0207000.0239000.0207000.00080000.035000.045000.0102000.081000.0105000.097000.0101000.0108000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:AccruedRealEstateTaxes us-gaap:BalanceSheetLocation

maa:AccruedRealEstateTaxes

us-gaap:AccruedLiabilities


Accrued
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value14013112399976356
Percentage of AccruedRealEstateTaxes100.0100.0100.0100.0100.0100.0100.0

maa:BuildingsImprovementsAndOther

maa:BuildingsImprovementsAndOther


Buildings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value12246121761206512037119601189711841118251177511670
Percentage of BuildingsImprovementsAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:BuildingsImprovementsAndOther us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Buildings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value12246121761206512037119601189711841118251177511670
Percentage of BuildingsImprovementsAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:CommonStockDiscountRate us-gaap:Range, us-gaap:StatementClassOfStock

maa:CommonStockDiscountRate

srt:Maximum, maa:DividendAndDistributionReinvestmentAndSharePurchasePlan


Common
Period End2020-12-31
Value5.0
Percentage of CommonStockDiscountRate100.0

maa:LiabilitiesAndCapital us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:LiabilitiesAndCapital

us-gaap:LimitedPartner


Liabilities
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value11128111311115511230112471127411323
Percentage of LiabilitiesAndCapital100.0100.0100.0100.0100.0100.0100.0

maa:NotesPayableExcludingInterestRateSwapsAndCapAgreements us-gaap:DebtInstrument

maa:NotesPayableExcludingInterestRateSwapsAndCapAgreements

maa:FixedRateDebt


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-312011-12-31
Value4300430044004400410041004100380036003600310035003500310031603230340029803000249025702570261024202450247025002460248023002290743748731732732538
Percentage of NotesPayableExcludingInterestRateSwapsAndCapAgreements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:FloatingRateDebt


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-03-312011-12-31
Value28038517235400400400500900100011001100100014001300130011701580150094592087082010109901010102097010001160118011009429609419411111
Percentage of NotesPayableExcludingInterestRateSwapsAndCapAgreements6.59.03.90.89.89.89.813.225.027.835.531.428.645.241.140.234.453.050.038.035.833.931.441.740.440.940.839.440.350.451.5148.0125.9131.3128.5128.5206.6

maa:NumberOfUnitsUnderDevelopmentCommunity us-gaap:InvestmentType

maa:NumberOfUnitsUnderDevelopmentCommunity

maa:DevelopmentProperties


Number
Period End2021-06-302021-03-312020-12-312020-09-30
Value2654.02259.02607.01940.0
Percentage of NumberOfUnitsUnderDevelopmentCommunity100.0100.0100.0100.0

maa:ParentLPStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

maa:ParentLPStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Parent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6104600960786112616462086283622962666369
Percentage of ParentLPStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet

maa:RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet


Real
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1092311107112161129767166662655026892406
Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:RealEstateAssetsNet

maa:RealEstateAssetsNet


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value109821096110967109281093810965109871100411067111512723274627162694269825192417242323292253210920851935
Percentage of RealEstateAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:RealEstateAssetsNet us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value109821096110967109281093810965109871100411067110991115111196112631119311261112791134411371113416718
Percentage of RealEstateAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0

maa:RedeemableCapitalSharesParOrStatedValuePerShare us-gaap:StatementEquityComponents

maa:RedeemableCapitalSharesParOrStatedValuePerShare

us-gaap:NoncontrollingInterest


Redeemable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-06-282019-03-312018-12-312018-09-302018-06-30
Value168.42144.36126.69115.95114.67103.03131.86130.01117.76117.76109.3395.7100.18100.67
Percentage of RedeemableCapitalSharesParOrStatedValuePerShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:StockholdersEquityIncludingNoncontrollingInterest us-gaap:PartnerTypeOfPartnersCapitalAccount

maa:StockholdersEquityIncludingNoncontrollingInterest

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value61206019608861196171621562896236627263256372643164796573
Percentage of StockholdersEquityIncludingNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:StockholdersEquityIncludingNoncontrollingInterest us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, maa:NoncontrollingInterestOperatingPartnership


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value185204206208209211214213215218220221224231
Percentage of StockholdersEquityIncludingNoncontrollingInterest3.03.43.43.43.43.43.43.43.43.43.53.43.53.5

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, maa:NoncontrollingInterestsConsolidatedRealEstateEntities


Stockholders
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-31
Value16109.8486.8496.6486.247
Percentage of StockholdersEquityIncludingNoncontrollingInterest0.30.20.20.10.10.1

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AccumulatedDistributionsInExcessOfNetIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-1272.694-1367.347-1294.182-1258.072-1202.536-1160.944-1085.479-1119.714-1086.665-1037.268-989.263-940.773-887.672-784.5
Percentage of StockholdersEquityIncludingNoncontrollingInterest-20.8-22.7-21.3-20.6-19.5-18.7-17.3-18.0-17.3-16.4-15.5-14.6-13.7-11.9

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-11.632-11.859-12.128-12.396-12.665-12.934-13.178-14.87-9.092-3.3-0.212117.9862.157
Percentage of StockholdersEquityIncludingNoncontrollingInterest-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.1-0.1-0.00.20.10.0

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value72017182717671737168717071667149714671417138713571307121
Percentage of StockholdersEquityIncludingNoncontrollingInterest117.7119.3117.9117.2116.2115.4113.9114.6113.9112.9112.0110.9110.1108.3

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1.1471.1421.1411.141.141.141.141.1381.1381.1371.1361.1361.1361.134
Percentage of StockholdersEquityIncludingNoncontrollingInterest0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

maa:MidAmericaApartmentCommunitiesIncShareholdersEquity, us-gaap:NoncontrollingInterest


Stockholders
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value109.8487.1116.8496.6486.2476.6115.6565.1662.3062.3062.3062.306
Percentage of StockholdersEquityIncludingNoncontrollingInterest0.20.20.10.10.10.10.10.10.10.00.00.00.0

maa:UndevelopedLand

maa:UndevelopedLand


Undeveloped
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value353460343434344158
Percentage of UndevelopedLand100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances


Real
Period End2020-12-312018-12-31
Value6.588180
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances100.0100.0

srt:RealEstateFederalIncomeTaxBasis

srt:RealEstateFederalIncomeTaxBasis


Real
Period End2020-12-31
Value11
Percentage of RealEstateFederalIncomeTaxBasis100.0

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value5464975285704734454725214504131099686941018979919382727369
Percentage of AccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedLiabilitiesCurrentAndNoncurrent us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value546497528570473445472521450419413473409390405439381368414226
Percentage of AccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDistributionsInExcessOfNetIncome

us-gaap:AccumulatedDistributionsInExcessOfNetIncome


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value127213671294125812021160108511191086989567582612603596624625621614605589575510
Percentage of AccumulatedDistributionsInExcessOfNetIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AreaOfLand us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty, us-gaap:StatementGeographical, us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AreaOfLand

maa:ColonialPromenade, country:AL, us-gaap:Land


Area
Period End2020-09-30
Value27.0
Percentage of AreaOfLand100.0

us-gaap:AreaOfLand us-gaap:StatementGeographical, us-gaap:BusinessAcquisition, us-gaap:PropertyPlantAndEquipmentByType

maa:AustinTX, maa:MAAWindmillHill, us-gaap:Land


Area
Period End2020-12-31
Value22.0
Percentage of AreaOfLand0.0

maa:DenverCO, maa:MAACentralPark, us-gaap:Land


Area
Period End2020-12-31
Value27.0
Percentage of AreaOfLand0.0

maa:TampaFL, maa:MAAWestshore, us-gaap:Land


Area
Period End2021-06-30
Value19.0
Percentage of AreaOfLand0.0

stpr:TX, maa:Georgetown, us-gaap:Land


Area
Period End2020-09-30
Value22.0
Percentage of AreaOfLand81.5

us-gaap:AreaOfRealEstateProperty us-gaap:InvestmentType

us-gaap:AreaOfRealEstateProperty

us-gaap:CommercialRealEstate


Area
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value260000.0260000.0260000.0260000.0260000.0260000.0260000.0260000.0260000.0260000.0260000.0232000.0232000.0269000.0269000.0269000.0208000.0196000.0196000.0263000.0263000.0287000.0287000.0287000.01124600.0
Percentage of AreaOfRealEstateProperty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Retail


Area
Period End2020-09-302020-06-302020-03-312019-12-312019-03-312018-12-312018-09-302018-06-30
Value630000.0630000.0630000.0630000.0615000.0615000.0615000.0610000.0
Percentage of AreaOfRealEstateProperty242.3242.3242.3242.3236.5236.5236.5234.6

us-gaap:Capital us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:Capital

us-gaap:LimitedPartner


Capitalus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value61046009607861126164620862836229626663206369642964776518657165486529658466393157
Percentage of Capital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommercialPaper maa:DebtInformation, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:CommercialPaper

maa:VariableRateCommercialPaperProgram, us-gaap:CommercialPaper, us-gaap:UnsecuredDebt


Commercial
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value2803851723570
Percentage of CommercialPaper100.0100.0100.0100.0100.0

us-gaap:CommonStockValueOutstanding

us-gaap:CommonStockValueOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1147000.01142000.01141000.01140000.01140000.01140000.01140000.01138000.01138000.01136000.0427000.0427000.0426000.0422000.0419000.0410000.0409000.0389000.0378000.0371000.0365000.0348000.0290000.0
Percentage of CommonStockValueOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DebtInstrumentFaceAmount

maa:MAALP, maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Debt
Period End2020-08-31
Value450
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:DebtInstrumentFaceAmount maa:DebtInformation, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

maa:FairMarketValueAdjustmentandDebtIssuanceCost, maa:A1BillionUnsecuredRevolvingCreditFaciltiy, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value-14.708-15.668-16.627-17.575-12.216-12.96-13.799
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.0

maa:FixedRateDebtSeniorNotes, us-gaap:IncomeNotes, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-30
Value3700370037003700330032502700
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.0

maa:FixedRateDebtSeniorNotes, us-gaap:PrivatePlacement, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-30
Value222222222222222222242
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.0

us-gaap:DebtInstrumentFaceAmount maa:DebtInformation, us-gaap:LongtermDebtType

maa:FixedRateDebtSeniorNotes, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value3922392239223922347234723472319229422642
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Debt
Period End2020-08-31
Value450
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:PrivatePlacement, us-gaap:UnsecuredDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value222222222222222222222242242242242292292
Percentage of DebtInstrumentFaceAmount0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage

us-gaap:DebtInstrumentInterestRateEffectivePercentage


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value3.53.43.63.70.0370.0380.0380.0380.0380.0390.0380.0370.0370.0360.0360.0350.0360.0340.0350.0360.0370.0370.0370.0360.0360.0370.0370.0370.0380.0380.0390.0320.0350.0360.0380.0370.0380.0380.0370.0390.038
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount us-gaap:CreditFacility

us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount

us-gaap:CommercialPaper


Debt
Period End2021-06-302021-03-312020-09-30
Value401298118
Percentage of DebtInstrumentUnusedBorrowingCapacityAmount100.0100.0100.0

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

us-gaap:DeferredFinanceCostsGross

maa:MAALP, maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Deferred
Period End2020-08-31
Value5.3
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredFinanceCostsGross us-gaap:DebtInstrument, us-gaap:LongtermDebtType

maa:OnePointSevenZeroNotesDueTwoThousandAndThirtyOne, us-gaap:UnsecuredDebt


Deferred
Period End2020-08-31
Value5.3
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredFinanceCostsNet us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsNet

us-gaap:SecuredDebt


Deferred
Period End2021-06-302021-03-31
Value3.2823.303
Percentage of DeferredFinanceCostsNet100.0100.0

us-gaap:DerivativeCapInterestRate us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

us-gaap:DerivativeCapInterestRate

maa:Encumbrance1


Derivative
Period End2020-12-31
Value4.44
Percentage of DerivativeCapInterestRate100.0

maa:Encumbrance2


Derivative
Period End2020-12-31
Value5.08
Percentage of DerivativeCapInterestRate114.4

maa:Encumbrance3


Derivative
Period End2020-12-31
Value4.43
Percentage of DerivativeCapInterestRate99.8

us-gaap:DividendsPayableCurrentAndNoncurrent us-gaap:BalanceSheetLocation

us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:AccruedLiabilities


Dividends
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1211181131081026561
Percentage of DividendsPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:DueToRelatedPartiesCurrent

us-gaap:DueToRelatedPartiesCurrent


Due
Period End2020-12-312019-12-312018-12-31
Value190.0190.019
Percentage of DueToRelatedPartiesCurrent100.0100.0100.0

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset us-gaap:FairValueByMeasurementFrequency

us-gaap:EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset

us-gaap:FairValueMeasurementsRecurring


Embedded
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
Value37233921208.936382218182021182118141410
Percentage of EmbeddedDerivativeFairValueOfEmbeddedDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2020-12-31
Value14
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:EmployeeStockOwnershipPlanESOPDeferredSharesFairValue

us-gaap:EmployeeStockOwnershipPlanESOPDeferredSharesFairValue


Employee
Period End2020-12-31
Value16
Percentage of EmployeeStockOwnershipPlanESOPDeferredSharesFairValue100.0

us-gaap:GeneralPartnersCapitalAccount us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:GeneralPartnersCapitalAccount

us-gaap:LimitedPartner


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value58635750581758495901594360155964599360386083612861776221627062496230627963372993
Percentage of GeneralPartnersCapitalAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPayableCurrentAndNoncurrent us-gaap:BalanceSheetLocation

us-gaap:InterestPayableCurrentAndNoncurrent

us-gaap:AccruedLiabilities


Interest
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value24211518151717
Percentage of InterestPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:LandAvailableForDevelopment us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LandAvailableForDevelopment

us-gaap:LimitedPartner


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value35346034343434585858314150575764717151
Percentage of LandAvailableForDevelopment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value1435000.02156000.02863000.0707000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextRollingTwelveMonths100.0100.0100.0100.0

us-gaap:LettersOfCreditOutstandingAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LettersOfCreditOutstandingAmount

maa:A1billionunsecuredrevolvingcreditfacility, us-gaap:UnsecuredDebt


Letters
Period End2020-12-312019-06-30
Value3400000.02500000.0
Percentage of LettersOfCreditOutstandingAmount100.0100.0

us-gaap:LimitedPartnersCapitalAccount us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartnersCapitalAccount

us-gaap:LimitedPartner


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value185204206208209211214213215218220221224226231231231233235165
Percentage of LimitedPartnersCapitalAccount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LimitedPartnersCapitalAccount us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest


Limited
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value609585514470465418536529481448393412416
Percentage of LimitedPartnersCapitalAccount328.9286.3248.4226.2221.7197.7249.9248.0223.6205.9178.8185.8185.2

us-gaap:LineOfCredit maa:DebtInformation, us-gaap:LongtermDebtType

us-gaap:LineOfCredit

maa:FairMarketValueAdjustmentandDebtIssuanceCost, us-gaap:SecuredDebt


Line
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-3.37-3.426-3.51-3.424-3.42-3.395-3.301-3.726-1.1354.8867.6813
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value26522610198517781848163915411575843671
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive us-gaap:DebtInstrument

maa:AmortizationOther


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value-10.812-3.4096.129-3.468-1.35-1.00460
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive-0.4-0.10.3-0.2-0.1-0.13.9

maa:DebtMaturities


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value26632614199217821849164014811503828638
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.4100.1100.3100.2100.1100.196.195.498.195.2

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value3632073354373032074544576.70368
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths us-gaap:DebtInstrument

maa:AmortizationOther


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value-0.073-3.323-2.58319261810
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths-0.0-1.6-0.84.38.69.12.4

maa:DebtMaturities


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value3632113334182771884434301.48664
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0101.699.295.791.490.997.694.222.294.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value40342036066433938057039016283
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive us-gaap:DebtInstrument

maa:AmortizationOther


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value-3.57-1.5092.023-2.037-0.6773.36110
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive-0.9-0.40.6-0.3-0.20.91.8

maa:DebtMaturities


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value40642136266734037755937915580
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.9100.4100.6100.3100.299.198.297.195.796.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value41736166433979554643147988172
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour us-gaap:DebtInstrument

maa:AmortizationOther


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value-2.828-2.4872.713-1.4622.7687.04411
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour-0.7-0.70.4-0.40.31.32.6

maa:DebtMaturities


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value42036366734079253941946982168
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.7100.7100.4100.499.798.797.497.994.297.9

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value360665338714725480334173198447
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree us-gaap:DebtInstrument

maa:AmortizationOther


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value-1.858-3.0982.1381.9676.7781411
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree-0.5-0.50.60.30.93.13.5

maa:DebtMaturities


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value362668340712719465322164193443
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.5100.5100.699.799.196.996.594.897.799.1

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value366189843567486173192397374207
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo us-gaap:DebtInstrument

maa:AmortizationOther


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value-0.856-3.393-1.2914.653211710
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo-0.2-1.8-0.20.84.49.95.5

maa:DebtMaturities


Long
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value367192842562465156182388369202
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.2101.899.899.295.690.194.597.998.797.9

us-gaap:LossContingencyAccrualAtCarryingValue

us-gaap:LossContingencyAccrualAtCarryingValue


Loss
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-31
Value5.25.25.37.48.58.68.69.08.68.88.723293132353841429.59.9141313131212110.0
Percentage of LossContingencyAccrualAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:MinorityInterestInJointVentures

us-gaap:MinorityInterestInJointVentures


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312016-12-31
Value16109.8487.1116.8496.6486.2476.6115.6562.3062.3
Percentage of MinorityInterestInJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MinorityInterestInJointVentures us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value16109.8487.1116.8496.6486.2476.6115.6565.1662.3062.3062.3062.3062.3062.3062.3062.3062.3060.0
Percentage of MinorityInterestInJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.0100.30.0

us-gaap:MinorityInterestInOperatingPartnerships

us-gaap:MinorityInterestInOperatingPartnerships


Minority
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value185204206208209211214213215220
Percentage of MinorityInterestInOperatingPartnerships100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MinorityInterestOwnershipPercentageByParent us-gaap:Ownership

us-gaap:MinorityInterestOwnershipPercentageByParent

maa:NovelDaybreak


Minority
Period End2021-06-30
Value80.0
Percentage of MinorityInterestOwnershipPercentageByParent100.0

maa:NovelValVista


Minority
Period End2020-12-31
Value80.0
Percentage of MinorityInterestOwnershipPercentageByParent0.0

maa:NovelWestMidtown


Minority
Period End2021-06-30
Value80.0
Percentage of MinorityInterestOwnershipPercentageByParent100.0

us-gaap:MortgageLoansOnRealEstate maa:DebtInformation, us-gaap:DebtInstrument

us-gaap:MortgageLoansOnRealEstate

maa:FixedRateDebtSeniorNotes, us-gaap:SecuredDebt


Mortgage
Period End2020-12-312019-12-31
Value488629
Percentage of MortgageLoansOnRealEstate100.0100.0

us-gaap:MortgageLoansOnRealEstate maa:DebtInformation, us-gaap:LongtermDebtType

maa:FixedRateDebtSeniorNotes, us-gaap:SecuredDebt


Mortgage
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-06-302018-12-31
Value369369489626628629663476
Percentage of MortgageLoansOnRealEstate0.00.00.00.00.0100.00.00.0

maa:FixedRatePropertyMortgages, us-gaap:SecuredDebt


Mortgage
Period End2021-06-302021-03-312020-12-312019-12-31
Value369369488629
Percentage of MortgageLoansOnRealEstate0.00.0100.0100.0

us-gaap:NotesPayable

us-gaap:NotesPayable


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value45534657456244254472448344544476453945484530450445484498450044924573455744993434348934433427342534423479352434303475346334721860169116911673170615891540164915871535145115001399
Percentage of NotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesPayable us-gaap:DebtInstrument

maa:AmortizationOther


Notes
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value-19.997-17.2199.129185560115
Percentage of NotesPayable-0.4-0.40.20.41.21.83.3

maa:DebtMaturities


Notes
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value4582447145374483444433673409333516311598
Percentage of NotesPayable100.4100.4100.299.698.898.296.796.197.596.9

us-gaap:NotesPayable us-gaap:LongtermDebtType

us-gaap:SecuredDebt


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value36536648548662262462664566047511091129129612381243124713731413142915921554156317901190
Percentage of NotesPayable8.07.910.611.013.913.914.114.414.510.524.724.728.436.135.636.240.141.141.145.245.345.051.671.1

us-gaap:UnsecuredDebt


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value418742914077393938493859382838303879388640533582362135663525338234433260318021952246219621412051202820501932187519121681483
Percentage of NotesPayable92.092.189.489.086.186.185.985.685.585.489.579.579.679.378.475.375.371.670.763.964.463.862.559.958.958.954.854.755.048.428.9

us-gaap:NotesPayableFairValueDisclosure us-gaap:DebtInstrument

us-gaap:NotesPayableFairValueDisclosure

maa:FixedRateDebt


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4700460049004900460044004500410038003700310035003500320032903410355031203130268027602720271024602480255025402490251023302300785783782777723613563560567312238
Percentage of NotesPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

maa:FloatingRateDebt


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value280385172354004004005009001000110011001000140013001300117515911511934910840820990970990970880910107011201000865882860956983949105398310371151
Percentage of NotesPayableFairValueDisclosure6.08.43.50.78.79.18.912.223.727.035.531.428.643.839.538.133.151.048.334.933.030.930.340.239.138.838.235.336.345.948.7127.4110.5112.8110.6132.2160.4168.6188.0173.4332.4483.6

us-gaap:NumberOfRealEstateProperties us-gaap:InvestmentType, us-gaap:StatementScenario

us-gaap:NumberOfRealEstateProperties

maa:DevelopmentProperties, us-gaap:ScenarioForecast


Number
Period End2021-06-302020-12-312020-06-302019-12-31
Value1.01.01.02.0
Percentage of NumberOfRealEstateProperties100.0100.0100.0100.0

us-gaap:NumberOfRealEstateProperties us-gaap:StatementScenario

srt:ScenarioForecast


Number
Period End2021-12-31
Value2.0
Percentage of NumberOfRealEstateProperties0.0

us-gaap:NumberOfRealEstateProperties us-gaap:StatementScenario, us-gaap:InvestmentType

srt:ScenarioForecast, maa:DevelopmentProperties


Number
Period End2022-12-312021-12-312021-09-302020-12-312020-09-302019-12-31
Value1.04.01.01.01.01.0
Percentage of NumberOfRealEstateProperties0.00.00.0100.00.050.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302019-09-302019-06-30
Value4.44.44.44.40.0440.044
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards

us-gaap:OperatingLossCarryforwards


Operating
Period End2020-12-31
Value62
Percentage of OperatingLossCarryforwards100.0

us-gaap:PartnersCapital us-gaap:ConsolidatedEntities

us-gaap:PartnersCapital

maa:MAALP


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value61206019608861196171621562896236627263256372643164796573
Percentage of PartnersCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PartnersCapital us-gaap:ConsolidatedEntities, us-gaap:PartnerCapitalComponents

maa:MAALP, maa:GeneralPartnersCapitalAccount


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value58635750581758495901594360155964599360386083612861776270
Percentage of PartnersCapital95.895.595.595.695.695.695.695.695.695.595.595.395.395.4

maa:MAALP, us-gaap:LimitedPartner


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value185204206208209211214213215218220221224231
Percentage of PartnersCapital3.03.43.43.43.43.43.43.43.43.43.53.43.53.5

us-gaap:PartnersCapital us-gaap:ConsolidatedEntities, us-gaap:StatementEquityComponents

maa:MAALP, us-gaap:AociAttributableToNoncontrollingInterest


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-11.939-12.217-12.496-12.774-13.053-13.331-13.584-15.339-9.366-3.362-0.161128.3322.295
Percentage of PartnersCapital-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.2-0.1-0.1-0.00.20.10.0

maa:MAALP, us-gaap:NoncontrollingInterest


Partners
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value16109.8487.1116.8496.6486.2476.6115.6565.1662.3062.3062.3062.306
Percentage of PartnersCapital0.30.20.20.10.10.10.10.10.10.10.00.00.00.0

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest


Partners
Period End2020-12-312019-12-312017-12-312016-12-31
Value6088628965736642
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest us-gaap:PartnerCapitalComponents

maa:NoncontrollingInterestConsolidatedRealEstateEntity


Partners
Period End2020-12-312019-12-312017-12-312016-12-31
Value9.8486.2472.3062.306
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest0.20.10.00.0

maa:TemporaryEquity


Partners
Period End2020-12-312019-12-312017-12-312016-12-31
Value15141010
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest0.30.20.20.2

us-gaap:AociAttributableToNoncontrollingInterest


Partners
Period End2020-12-312019-12-312017-12-312016-12-31
Value-12.496-13.5842.2951.246
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest-0.2-0.20.00.0

us-gaap:GeneralPartner


Partners
Period End2020-12-312019-12-312017-12-312016-12-31
Value5817601562706337
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest95.595.695.495.4

us-gaap:LimitedPartner


Partners
Period End2020-12-312019-12-312017-12-312016-12-31
Value206214231235
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest3.43.43.53.6

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Partners
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value61196171621562896236627263256372643164796520657365506532658666423157
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest0.00.00.0100.00.00.00.00.00.00.00.0100.00.00.00.0100.00.0

us-gaap:PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedDistributionsInExcessOfNetIncome


Partners
Period End2020-12-312019-12-312017-12-312016-12-31
Value66666664
Percentage of PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest1.11.11.01.0

us-gaap:PreferredUnitsPreferredPartnersCapitalAccounts us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:PreferredUnitsPreferredPartnersCapitalAccounts

us-gaap:LimitedPartner


Preferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value666666666666666666666666666666666666640.0
Percentage of PreferredUnitsPreferredPartnersCapitalAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RealEstateAccumulatedDepreciation

us-gaap:RealEstateAccumulatedDepreciation


Real
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value341529552549207516741499137311381040973
Percentage of RealEstateAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements


Real
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1234811729113981108472377080675333413044
Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfLand

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfLand


Real
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1990192718931887978954935387335
Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements


Real
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value101121010010017997560986082591825712372
Percentage of RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfLand

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfLand


Real
Period End2020-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1960192018871881958949930382329
Percentage of RealEstateAndAccumulatedDepreciationInitialCostOfLand100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateGrossAtCarryingValue

us-gaap:RealEstateGrossAtCarryingValue


Real
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value143381389813656132921297282158035768937293379294126982522
Percentage of RealEstateGrossAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value36253544341533163206308029552906279125491068105110591027995990980961937937917889788
Percentage of RealEstateInvestmentPropertyAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value36253544341533163206308029552906279126682549243923162194207519671851176816561482
Percentage of RealEstateInvestmentPropertyAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:RealEstateInvestmentPropertyAtCost

us-gaap:RealEstateInvestmentPropertyAtCost


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value145301442714277141671406713967138641382513757135983776378237663707367934953371335932403163299829482704
Percentage of RealEstateInvestmentPropertyAtCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentPropertyAtCost us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value145301442714277141671406713967138641382513757136661359813558134931329313234131261304313011128698138
Percentage of RealEstateInvestmentPropertyAtCost100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:RealEstateInvestmentPropertyAtCost us-gaap:PropertyPlantAndEquipmentByType

us-gaap:LeasesAcquiredInPlace


Real
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312016-09-302015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1.32.63.91142426.14.6501.61.81.81.7
Percentage of RealEstateInvestmentPropertyAtCost0.00.00.00.00.00.00.00.00.00.00.10.10.1

us-gaap:RealEstateInvestmentPropertyNet

us-gaap:RealEstateInvestmentPropertyNet


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value109041088310862108501086010886109081091910965110492707273027062679268325042391239723032226208120581916
Percentage of RealEstateInvestmentPropertyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentPropertyNet us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value109041088310862108501086010886109081091910965109971104911119111771109811159111581119111242112136655
Percentage of RealEstateInvestmentPropertyNet100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:RealEstateInvestmentsJointVentures

us-gaap:RealEstateInvestmentsJointVentures


Real
Period End2021-06-302021-03-312020-09-302020-06-302020-03-31
Value1919212323
Percentage of RealEstateInvestmentsJointVentures100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentsJointVentures us-gaap:BalanceSheetLocation

us-gaap:OtherAssets


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value32242321191313
Percentage of RealEstateInvestmentsJointVentures163.3128.60.0100.085.758.40.0

us-gaap:RealEstateInvestmentsJointVentures us-gaap:ProductOrService

us-gaap:RealEstate


Real
Period End2020-12-312019-12-31
Value198.2
Percentage of RealEstateInvestmentsJointVentures0.00.0

us-gaap:RealEstateInvestmentsJointVentures us-gaap:ProductOrService, us-gaap:BalanceSheetLocation

us-gaap:RealEstate, us-gaap:OtherAssets


Real
Period End2020-12-312019-12-312018-12-31
Value23133.8
Percentage of RealEstateInvestmentsJointVentures0.00.00.0

us-gaap:RealEstateInvestmentsJointVentures us-gaap:ProductOrService, us-gaap:RealEstateProperties

us-gaap:RealEstate, maa:PostMassachusettsAvenue


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value4243434343434344
Percentage of RealEstateInvestmentsJointVentures218.9225.00.0204.2189.6183.60.00.0

us-gaap:RestrictedCash

us-gaap:RestrictedCash


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1110109.18215145016161417332878
Percentage of RestrictedCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCash us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1110109.182151450161614173328227880272488
Percentage of RestrictedCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.0

us-gaap:SecuredDebt

us-gaap:SecuredDebt


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value3653664854866226246266456604751050110611141190119212261353151414521500
Percentage of SecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SecuredDebt us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value36536648548662262462664566066147592192693297611091129129613191286
Percentage of SecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:SecurityDepositLiability us-gaap:BalanceSheetLocation

us-gaap:SecurityDepositLiability

us-gaap:AccruedLiabilities


Security
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value2119181918
Percentage of SecurityDepositLiability100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:EmployeeStockOption


Sharebased
Period End2020-12-31
Value1000000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests


Temporary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2117151313111413129.414
Percentage of TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Temporary
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value211715131311141312119.4149.6079.417.7821010109.132108.25
Percentage of TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:UnsecuredDebt

us-gaap:UnsecuredDebt


Unsecured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value4187429140773939384938593828383038794053810585577483514363187135135
Percentage of UnsecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnsecuredDebt us-gaap:PartnerTypeOfPartnersCapitalAccount

us-gaap:LimitedPartner


Unsecured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value41874291407739393849385938283830387938864053358236213566352533823443326031802141
Percentage of UnsecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.0

Line plots across dimensions of each concept


us-gaap:SharesIssued
us-gaap:StatementEquityComponents
(None,)
Shares Issuedus-gaap: Statement Equity Components
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
('maa:MidAmericaApartmentCommunitiesIncShareholdersEquity', None)
Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Taxus-gaap: Partner Type Of Partners Capital Account, us-gaap: Statement Equity Components
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Statement Business Segments
us-gaap:Revenues
us-gaap:StatementBusinessSegments
(None,)
Revenuesus-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:StatementBusinessSegments
(None,)
Assetsus-gaap: Statement Business Segments
us-gaap:ConstructionInProgressGross
us-gaap:StatementScenario, us-gaap:InvestmentType
(None, 'maa:DevelopmentProperties')
Construction In Progress Grossus-gaap: Statement Scenario, us-gaap: Investment Type
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:PartnerTypeOfPartnersCapitalAccount, us-gaap:StatementEquityComponents
('maa:MidAmericaApartmentCommunitiesIncShareholdersEquity', None)
Stock Issued During Period Value New Issuesus-gaap: Partner Type Of Partners Capital Account, us-gaap: Statement Equity Components