GTY


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

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:MortgageLoansOnRealEstateOriginalLoanAmount, us-gaap:DebtInstrument
us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:Dividends

us-gaap:OperatingIncomeLoss

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ProfitLoss

us-gaap:Revenues

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:Land

us-gaap:ConstructionInProgressGross
us-gaap:BalanceSheetLocation, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:LongTermDebt

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:Dividends
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock
us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:SubsidiarySaleOfStock

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:AmortizationOfFinancingCosts

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:Dividends

us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends

us-gaap:Dividends
us-gaap:Dividends

gty:AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue
us-gaap:StatementEquityComponents

gty:AmortizationOfAboveMarketAndBelowMarketLeases

gty:AmortizationOfInvestmentInDirectFinancingLease

gty:AmountOfCreditsToEnvironmentalExpenses

gty:AssetImpairmentChargesContinuingAndDiscontinuingOperations

gty:ChangesInEnvironmentalEstimates

gty:CollectionOfNotesAndMortgagesReceivable

gty:CostsAndExpensesBeforeGainsLossesFromSaleOfProperties

gty:DepreciationAndAmortizationForCapitalizedAssetRetirementCosts

gty:DividendsDeclaredButNotYetPaid

gty:EnvironmentalRemediationCostsPaid

gty:IncomeStatementLeaseRevenue

gty:IncreaseDecreaseInCashHeldForPropertyAcquisitions

gty:IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities

gty:IncreaseDecreaseInDeferredRentReceivable

gty:IncreaseInCarryingValueOfProperty

gty:IssuanceOfNotesAndMortgagesReceivable

gty:NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted

gty:OperatingCashFlowsForFinancingLeases

gty:PaymentsInSettlementOfRestrictedStockUnits
us-gaap:FairValueByFairValueHierarchyLevel
gty:PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs

gty:ProceedsFromSaleOfInvestmentRealEstate

gty:ProceedsOrPaymentsForConstructionInProcess

gty:RealEstateRevenueRecognitionAdjustments

gty:RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses

us-gaap:AssetImpairmentCharges
us-gaap:StatementOperatingActivitiesSegment

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:BelowMarketLeaseAcquired
us-gaap:BusinessAcquisition
us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType, us-gaap:LeaseContractualTerm
us-gaap:ConcentrationRiskPercentage1

us-gaap:CostOfPropertyRepairsAndMaintenance

us-gaap:DepreciationAndAmortization

us-gaap:DividendsShareBasedCompensation

us-gaap:EnvironmentalExpenseAndLiabilities

us-gaap:EnvironmentalRemediationExpense

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:GainLossOnCondemnation

us-gaap:GainLossOnSaleOfProperties

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:LeaseCost

us-gaap:MortgageLoanRelatedToPropertySales1

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

us-gaap:PaymentsForCapitalImprovements

us-gaap:PaymentsOfOrdinaryDividends

us-gaap:PaymentsToAcquireCommercialRealEstate
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationSeparatelyRecognizedTransactions
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:ProceedsFromConstructionLoansPayable
us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock
us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:SubsidiarySaleOfStock

us-gaap:ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan

us-gaap:ProceedsFromLinesOfCredit
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:RepaymentsOfConstructionLoansPayable

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations

us-gaap:ShortTermLeaseCost
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesDividendReinvestmentPlan
us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock
us-gaap:StockIssuedDuringPeriodSharesNewIssues
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensationGross

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan
us-gaap:StatementEquityComponents
us-gaap:BusinessAcquisition
gty:AboveMarketLeaseAcquired

gty:AccruedLegalMatters

gty:CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses

gty:CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived

gty:FinanceLeaseLiabilityPaymentsDueAfterYearFour
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
gty:ImpairedRealEstateAssetsFairValueDisclosure

gty:InvestmentBuildingsAndImprovementsGross

gty:LeaseAssets

gty:LeaseLiabilities

gty:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

gty:LessorOperatingLeasePaymentToBeReceivedAfterYearFour
us-gaap:PropertyPlantAndEquipmentByType
gty:NetAssetRetirementCostsRemoved

gty:NotesAndMortgagesReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:LiabilityForCatastropheClaimsByCatastrophicEvent, us-gaap:SubsequentEventType
gty:PercentageOfRentReceivedFromTenants

gty:RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsForTaxPurposes

gty:RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization

gty:RealEstateHeldForSalePropertyAtCost
us-gaap:LongLivedAssetsHeldForSaleByAssetType

gty:RealEstateInvestmentPropertyGross

gty:RealEstateInvestmentPropertyHeldForUseNet

gty:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedAfterYearFour
us-gaap:AwardType, us-gaap:PlanName
gty:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAtSpecifiedDateIntrinsicValue

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages

srt:MortgageLoansOnRealEstatePriorLiens1

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccountsReceivableNet

us-gaap:AccrualForEnvironmentalLossContingencies
us-gaap:EnvironmentalRemediationContingency

us-gaap:AccumulatedDistributionsInExcessOfNetIncome
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition, us-gaap:BusinessCombinationSeparatelyRecognizedTransactions
us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition, us-gaap:BusinessCombinationSeparatelyRecognizedTransactions
us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeases

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty

us-gaap:CapitalizedCostsAssetRetirementCosts
us-gaap:EnvironmentalRemediationContingency

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:DebtInstrumentCarryingAmount
us-gaap:CreditFacility
us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:BalanceSheetLocation, us-gaap:CreditFacility

us-gaap:DeferredCostsLeasingNet

us-gaap:DeferredRentReceivablesNet
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:DeferredRevenueLeasesAccumulatedAmortization
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:DeferredRevenueLeasesGross

us-gaap:DividendsPayableCurrentAndNoncurrent
us-gaap:AwardType, us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent
us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisition, us-gaap:BusinessCombinationSeparatelyRecognizedTransactions
us-gaap:BusinessCombinationSeparatelyRecognizedTransactions
us-gaap:BalanceSheetLocation, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

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

us-gaap:LineOfCredit
us-gaap:CreditFacility

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
us-gaap:CreditFacility

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
us-gaap:CreditFacility
us-gaap:LongtermDebtType

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:CreditFacility
us-gaap:LongtermDebtType

us-gaap:MortgageLoansOnRealEstate
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:LongtermDebtType
us-gaap:NotesPayableFairValueDisclosure

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter

us-gaap:PrepaidExpenseAndOtherAssets
us-gaap:ImpairedLongLivedAssetsHeldAndUsedByType
us-gaap:PropertyPlantAndEquipmentFairValueDisclosure

us-gaap:RealEstateAccumulatedDepreciation

us-gaap:RealEstateGrossAtCarryingValue

us-gaap:RealEstateHeldforsale

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation

us-gaap:RealEstateInvestmentPropertyNet

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears
us-gaap:AwardType, us-gaap:PlanName
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested

us-gaap:UnsecuredDebt

Plots across concepts


IncomeStatement
Net Income Loss
Balance Sheet
Cash And Cash Equivalents At Carrying Value
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
Dividends Payable Current And Noncurrent
Noncurrent Liabilities
Long Term Debt
Stockholders Equity
Common Stock Value
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Gain Loss On Sale Of Property Plant Equipment
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CommonStockValue ██▇▇▆▆▆▆▆▆▆▅▅▅▅▅▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁0.4470.4440.4360.4270.4180.4140.4140.4120.4110.4090.4090.4050.4030.3970.3970.3950.3470.3460.3440.3390.3370.3370.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.334NA0.299NANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁44.70344.36743.60642.71941.79641.39141.36841.1941.10840.88340.85540.52240.26239.7139.69639.50134.67634.5970.0343930.0338720.0337350.0337010.03342233.42180233.42054233417.20333.41733.41687333.41687333.3973333.39733.3968833.3968833.3967933.39733.3963133.394835NA33.394395NANANA29.944NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁44.4743.875NA42.25441.46741.391NA41.17641.04940.891NA40.45539.91439.712NA38.70234.63434.555NANANANANA33.42233.4233.417NA33.41733.40333.397NA33.39733.39733.397NA33.39633.39533.394NA33.39533.39532.504NA29.94427.152
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁44.43743.872NA42.22641.45641.383NA41.13941.02440.873NA40.4339.90139.71NA38.70234.63434.555NANANANANA33.42233.4233.417NA33.41733.40333.397NA33.39733.39733.397NA33.39633.39533.394NA33.39433.39432.502NA29.94227.15
us-gaap:EarningsPerShareBasic ▂▃█▁▁▂▂▂▂▁▂▁▂▁▂▁▃▂0.280.40.79000000000000010.270.260.30.329999999999999960.280.320.260.319999999999999950.270.330.250.320000000000000060.240.430.28NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareDiluted ▄▅▆▄▄▄▄▄▄▄▄▄▄▄▄▄▅▄▄▄▅▄▅▄▅▃▃▄▄▄▄█▅▄▄▃▄▄▁▄▅▅0.280.40.770.270.260.30.330.280.320.260.320.270.330.250.330.240.430.280.240.260.40.230.590.210.34-0.04-0.10.30.20.290.151.250.380.310.17-0.10.110.19-0.580.160.450.35NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AllocatedShareBasedCompensationExpense █▇▅▆▆▅▅▅▅▃▃▃▃▂▂▂▂▁▁▂▂▂1.0320.9050.6630.8670.8680.7320.6650.6640.6650.4740.4680.4610.4630.3850.3540.3410.3530.3020.2730.3920.3860.375NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:MortgageLoansOnRealEstateOriginalLoanAmount,us-gaap:DebtInstrument gty:FifthAmendedAndRestatedPrudentialAgreement,gty:SeriesANote█▁0.0-1.233NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▅▅▅▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▅▄▄▄▅▄▄▁▄▄▄▅▇██▄▄▅▄▄▄5.0555.5094.5274.1544.5454.0683.7673.6413.7983.9773.6633.5563.8553.5873.3173.3953.6733.4933.0473.2573.8064.0444.0634.2444.8353.7893.7933.8654.4653.6544.22-4.6132.3573.4672.9754.96310.54713.13313.2772.6872.7364.8852.2141.8061.82
us-gaap:IncomeTaxesPaidNet ▅▇▄▄▄▇▄▄▄▆▄▄▄▆▁▃▂▆▄▄▇▅▄▅▆▄▃▅▅▆▁▅▄▇█▆▅▅▅▄▅▅▅▄0.0680.2840.0350.0250.0390.2510.0310.0260.0250.2220.02-0.0220.0020.244-0.231-0.057-0.1530.246-0.003-0.0010.2620.110.0020.1310.1850.023-0.0540.0970.0970.176-0.2770.1240.0290.2970.3930.2390.1070.0710.152-0.0310.0810.0650.0840.029NA
us-gaap:InterestAndFeeIncomeLoansAndLeases ▃▃▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▅▆▇█▆▅▅▆▆▅▅▆▅▆▅▅▅▅▅▅▅▅▃▁▁▁0.4150.3290.6550.7090.6680.7130.6930.7360.7280.7620.7730.7920.7590.7640.7330.7520.7480.7580.7730.7860.8651.1181.2260.910.7810.7810.8580.8170.7560.7140.930.7070.9620.7980.7750.7260.70.6810.7570.7550.7410.4050.0320.0340.035
us-gaap:InterestExpense ▇▇▇████▇▇▇▇▇▆▆▆▅▅▅▅▅▅▅▅▅▄▃▃▃▃▃▃▄▃▃▃▃▃▂▁▁▁▁▁▁▁6.1556.1296.0246.7056.6816.6756.4536.2475.9865.9465.926.065.3145.055.0914.3194.284.084.0354.1564.1554.2154.2794.4793.3532.3832.3762.4162.4342.582.7013.0742.9982.8942.862.8962.6921.4831.0461.4141.3461.3191.1181.1161.322
us-gaap:InterestPaidNet ▆▆████▆▆▆▆▅▅▃▄▂▁5.9395.8146.4376.466.4076.3475.6615.7945.8165.7595.435.4494.7855.1264.6014.094NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▅▅▇▅▄▅▅▅▅▄▅▄▅▄▅▄▅▄▄▄▅▄▅▄▅▃▃▄▄▄▄█▅▄▄▃▄▄▁▄▅▅▅▅▅12.8917.92733.83111.88410.97312.713.70811.8913.19810.92713.1910.94413.5410.03213.0369.3415.1069.7048.3288.80413.5767.70319.8937.03511.619-1.137-3.09210.2356.6379.6385.04541.87712.73910.355.801-3.4653.6266.485-19.4825.3515.20211.38612.48513.35113.959
us-gaap:OperatingIncomeLoss ▇█▇▇▇▇▇▆▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▆▅▄▄▆▆▆▄▇▆▅▅▅▅▅▁▅▇▆▆▆▆18.83723.99220.89118.21317.59318.8819.91412.517.6816.66820.74417.18415.89714.214.18312.73314.4513.35613.80612.73712.21811.43713.03311.1857.7722.535-0.3359.9759.18410.1771.28818.3510.8088.5016.4124.2073.4957.128-18.7556.26916.37912.57413.43914.6413.898
us-gaap:OtherNonoperatingIncomeExpense ▁▁█▁▁▁▁▃▂▁▂▁▁▁▂▁▂▁▁▁▁▁▅▁▄▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁0.2080.06420.1970.3760.0610.4950.2475.6371.5040.2052.22-0.0780.2240.3633.5260.8813.8760.2340.6070.6440.799-0.02410.7960.1217.3790.004-0.0690.0480.0370.1310.0490.019-0.0010.0350.0590.211-0.0010.333-0.0630.122-0.0490.0060.0480.0010.018
us-gaap:ProfitLoss ▂▃█▂▁▂▂▂▂▁▂▁▂▁▂12.8917.92733.83111.88410.97312.713.70811.8913.19810.92713.1910.94413.5410.03213.036NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:Revenues █▇▇█▇▇▇▇▆▆▆▆▆▅▆▄▄▃▄▄▄▄▄▄▃▂▃▂▂▂▂▄▂▂▂▂▃▅▅▄▄▂▁▁▁38.67837.2837.07637.90337.00435.36335.8936.42834.28834.04935.05434.69434.24232.11634.00329.46429.03727.64829.71928.51128.60828.42729.7929.98726.24224.70125.66924.83125.024.3324.5129.25825.10223.80723.72923.11227.47531.89531.58428.06727.86725.3522.09221.98421.769
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets ████▇▇▇▆▆▆▆▆▆▅▅▅▃▃▃▃▃▄▄▄▄▂▂▁▁▁▂▂▂▁▁▁▁▁▁▁▁1364.4381342.4721349.5121323.5381264.81269.4711211.7771193.5641177.351147.4921159.1751130.2471115.2811061.3931072.7541004.785887.439876.174877.306871.071873.691893.389899.129906.881916.59682.78687.501651.167654.234664.035682.402689.113704.266650.955640.581639.533647.926643.585635.089623.432636.842NA427.144NANA
us-gaap:Liabilities █▇██▇█▇▇▆▆▆▆▆▅▅▄▄▄▄▄▄▅▅▅▅▂▂▁▁▁▂▂▂▂▂▂▂▂▂▁▁678.672661.929689.911705.752670.292682.996622.338608.643592.839569.257578.011558.055548.612509.875519.059456.941445.424441.585446.388451.236457.629483.04492.568504.628513.448284.067280.477229.157235.965245.816267.311270.87321.387274.294267.832268.575269.476264.754262.92223.553234.091NA112.209NANA
us-gaap:LiabilitiesAndStockholdersEquity ████▇▇▇▆▆▆▆▆▆▅▅▅▃▃▃▃▃▄▄▄▄▂▂▁▁▁▂▂▂▁▁▁▁▁▁▁▁1364.4381342.4721349.5121323.5381264.81269.4711211.7771193.5641177.351147.4921159.1751130.2471115.2811061.3931072.7541004.785887.439876.174877.306871.071873.691893.389899.129906.881916.59682.78687.501651.167654.234664.035682.402689.113704.266650.955640.581639.533647.926643.585635.089623.432636.842NA427.144NANA
us-gaap:StockholdersEquity ██▇▆▆▆▆▆▆▆▆▅▅▅▅▅▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▂▂685.766680.543659.601617.786594.508586.475589.439584.921584.511578.235581.164572.192566.669551.518553.695547.844442.015434.589430.918419.835416.062410.349406.561402.253403.142398.713407.024422.01418.269418.219415.091418.243382.879376.661372.749370.958378.45378.831372.169399.879402.751NA314.935NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CashAndCashEquivalentsAtCarryingValue ▃▅██▄▅▃▅▄▃▇▃▃▃▃▃▂▃▂▂▁▂▁▁▂▁▁▂▂▂▂▁▁▃▃▃▃▃▂▂▂▄▁▁▂19.02531.83155.07558.33825.11135.92421.78135.63925.56319.14546.89218.56318.20818.01319.99218.0414.44718.05612.52310.1876.8118.1123.9423.7569.7866.643.1118.3967.7017.92212.0354.676.77918.72616.87616.38718.49216.0877.69814.00914.94123.4226.1223.58710.091
us-gaap:Land ███▇▇▇▇▇▇▇▇▆▆▆▆▅▄▄▄▄▄▄▄▄▄▂▂▂▂▂▂▂▂▁▁▁▂▂▂▂▂717.846712.02707.613687.618681.144674.812669.351656.496651.517630.653631.185629.602619.75587.511589.497552.782475.871474.393474.115474.103474.26475.311475.784477.123483.985341.164344.324344.537344.957342.59342.944351.7351.502307.753318.814320.808344.309345.984345.473352.592353.422NA253.413NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:ConstructionInProgressGross ▃▃▂▃▃▃▅▅▆▅▆█▆▅▄▄▃▂▂▁▁▁▃0.7740.750.7341.1410.9650.8972.082.1442.2642.0232.1683.3332.3921.9481.6821.2661.120.6220.4260.2660.2280.0440.955NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:BalanceSheetLocation,us-gaap:FiniteLivedIntangibleAssetsByMajorClass gty:PrepaidExpensesAndOtherAssets,gty:AboveMarketLeaseAndBelowMarketLeaseNANA3.859NANANA2.298NANANA3.5NANANA3.189NANANA2.527NANANA3.021NANANA3.3NANANA3.784NANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:BalanceSheetLocation,us-gaap:FiniteLivedIntangibleAssetsByMajorClass gty:PrepaidExpensesAndOtherAssets,us-gaap:LeasesAcquiredInPlaceNANA49.031NANANA41.013NANANA38.542NANANA35.704NANANA20.984NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:LeaseContractualTerm gty:BelowMarketLeasesOne,gty:LesseeNANA0.031NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:LeaseContractualTerm gty:BelowMarketLeasesOne,gty:LessorNANA18.787NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:LeaseContractualTerm us-gaap:AboveMarketLeases,gty:LessorNANA3.828NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass,us-gaap:LeaseContractualTerm us-gaap:LeasesAcquiredInPlace,gty:LessorNANA49.031NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▆▇█▁▂▃▅▆▇█22.90723.46224.31917.21517.95319.34121.19122.72423.87124.649NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:LongTermDebt █▇██▇▇▆▅▅▄▅▄▄▃▃▂▁▁▁540.712522.953547.693557.832522.572532.311467.051446.79437.106411.871441.636421.401411.214371.593379.158318.964308.771298.603298.544NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo █▇█▁3.7343.683.782.738NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▇▇█▁3.5883.5323.682.617NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▆▆█▁3.2113.1553.5322.461NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA3.155NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA13.88NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity ██▇▆▆▆▆▆▆▆▆▅▅▅▅▅▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▂▂685.766680.543659.601617.786594.508586.475589.439584.921584.511578.235581.164572.192566.669551.518553.695547.844442.015434.589430.918419.835416.062410.349406.561402.253403.142398.713407.024422.01418.269418.219415.091418.243382.879376.661372.749370.958378.45378.831372.169399.879402.751NA314.935NANA
us-gaap:CommonStockValue ██▇▇▆▆▆▆▆▆▆▅▅▅▅▅▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁0.4470.4440.4360.4270.4180.4140.4140.4120.4110.4090.4090.4050.4030.3970.3970.3950.3470.3460.3440.3390.3370.3370.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.334NA0.299NANA
us-gaap:AdditionalPaidInCapitalCommonStock ██▇▇▆▆▆▆▅▅▅▅▅▄▄▄▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁753.42743.305722.608697.301669.805656.981656.127649.762646.581638.877638.178627.905620.183605.553604.872599.212491.606489.451485.659473.168469.633468.954464.338464.026463.834463.582463.314463.058462.802462.639462.397462.17461.944461.726461.426461.234461.059460.864460.687460.524460.355NA368.093NANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents,us-gaap:SubsidiarySaleOfStock us-gaap:AdditionalPaidInCapital,gty:AtTheMarketEquityOfferingProgram▃▆▇█▄▁▂▂▃▁9.3120.25824.6426.61311.94-0.0275.3322.1536.678-0.017NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents,us-gaap:SubsidiarySaleOfStock us-gaap:CommonStock,gty:AtTheMarketEquityOfferingProgram▁▇██▃0.0020.0080.0090.0090.004NA0.0010.0010.002NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:SubsidiarySaleOfStock gty:AtTheMarketEquityOfferingProgram▃▆▇█▄▁▂▂▃▁9.31220.26624.64926.62211.944-0.0275.3332.1546.68-0.017NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅█▆▄▅▅▇▅▄▅▅▄▅▅▅▃▄▂▄▃▃▄▃▅▂▂▃▂▃▂█▁▂▁▁▁▃▃▅▅▅▄▄20.59719.40729.22320.81514.91517.87418.7826.43416.90514.65516.85915.73713.45117.29916.54318.4158.83612.9483.92313.9339.5779.44115.33310.76217.2716.3226.8368.585.8537.9684.87728.7563.4466.5993.6351.8142.1798.2578.53619.38316.36916.94214.01814.324NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▆▆▇▆▆▇▆▇▇▇▆▇▅▄▇▇▇▇█▇▇▇▁▇▇▇▇▇▇█▅▇▇▇▇▇▇▇▇▂▇▇-42.309-19.785-29.174-33.278-11.883-53.082-43.517-13.553-27.8092.326-4.453-19.191-53.7661.479-68.641-122.341-13.234-2.001-5.219-0.8516.3822.4054.9321.155-213.7072.896-3.3835.8729.62711.38914.7133.498-57.7052.652.2810.8210.48-0.0312.130.304-0.554-195.5290.5410.023NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▂▃▄▂▄▃▃▃▂▃▃▄▂▄▆▃▃▃▂▂▃▂▂█▃▂▂▂▂▂▁▄▃▃▃▃▃▂▂▂█▂▂8.718-22.866-3.34745.695-13.84449.47610.82-2.80517.325-44.63916.3314.07240.575-20.46454.051107.5140.843-5.3143.632-9.707-27.26-7.676-20.079-17.947199.582-5.689-8.738-13.757-15.701-23.47-12.222-64.36342.312-7.399-5.427-4.74-0.2540.163-16.977-20.619-24.296195.887-12.024-20.851NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▃▂▄█▃▆▃▅▅▁▇▄▄▄▄▅-12.994-23.244-3.29833.232-10.81214.268-13.91710.0766.421-27.65828.7370.6180.26-1.6861.9533.588NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AmortizationOfFinancingCosts ▇▇█▇▇▇▇▅▅▅▅▄▂▁0.2590.2590.2720.260.2610.260.2610.240.2350.2350.2350.2330.2090.194NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▅▅▅▆▅▅▅▅▅▅▅▆▅▅▅▆▅▆▅▅▅▅▅▅▅▅▅▅▅▅▁▅▅▅▅▇▇█▅▅▅▅▅0.824-1.215-0.4040.4072.506-1.4610.4030.5561.038-1.2570.4220.4862.096-2.191.2280.0891.663-1.6852.11-0.4281.473-0.773-0.4820.6730.2811.0740.3920.9070.61-1.1791.337-20.672-0.165-1.3470.880.0927.4797.39713.9620.993-0.3110.2460.368-0.023NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅█▆▄▅▅▇▅▄▅▅▄▅▅▅▃▄▂▄▃▃▄▃▅▂▂▃▂▃▂█▁▂▁▁▁▃▃▅▅▅▄▄20.59719.40729.22320.81514.91517.87418.7826.43416.90514.65516.85915.73713.45117.29916.54318.4158.83612.9483.92313.9339.5779.44115.33310.76217.2716.3226.8368.585.8537.9684.87728.7563.4466.5993.6351.8142.1798.2578.53619.38316.36916.94214.01814.324NA
us-gaap:NetIncomeLoss ▅▅▇▅▄▅▅▅▅▄▅▄▅▄▅▄▅▄▄▄▅▄▅▄▅▃▃▄▄▄▄█▅▄▄▃▄▄▁▄▅▅▅▅▅12.8917.92733.83111.88410.97312.713.70811.8913.19810.92713.1910.94413.5410.03213.0369.3415.1069.7048.3288.80413.5767.70319.8937.03511.619-1.137-3.09210.2356.6379.6385.04541.87712.73910.355.801-3.4653.6266.485-19.4825.3515.20211.38612.48513.35113.959
us-gaap:ProfitLoss ▂▃█▂▁▂▂▂▂▁▂▁▂▁▂12.8917.92733.83111.88410.97312.713.70811.8913.19810.92713.1910.94413.5410.03213.036NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation █▇▄▆▆▅▄▄▄▃▃▃▃▂▁▁▁▁1.0320.9050.6630.8670.8680.7320.6650.6640.6650.4740.4680.4610.4630.3850.3540.3410.3530.302NANANANANANANANANANANANANANANANA0.210.1750.1950.1770.1630.1690.1680.1430.1280.121NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▆▆▆▆▇▆▆▇▆▇▇▇▆▇▅▄▇▇▇▇█▇▇▇▁▇▇▇▇▇▇█▅▇▇▇▇▇▇▇▇▂▇▇-42.309-19.785-29.174-33.278-11.883-53.082-43.517-13.553-27.8092.326-4.453-19.191-53.7661.479-68.641-122.341-13.234-2.001-5.219-0.8516.3822.4054.9321.155-213.7072.896-3.3835.8729.62711.38914.7133.498-57.7052.652.2810.8210.48-0.0312.130.304-0.554-195.5290.5410.023NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▂▃▄▂▄▃▃▃▂▃▃▄▂▄▆▃▃▃▂▂▃▂▂█▃▂▂▂▂▂▁▄▃▃▃▃▃▂▂▂█▂▂8.718-22.866-3.34745.695-13.84449.47610.82-2.80517.325-44.63916.3314.07240.575-20.46454.051107.5140.843-5.3143.632-9.707-27.26-7.676-20.079-17.947199.582-5.689-8.738-13.757-15.701-23.47-12.222-64.36342.312-7.399-5.427-4.74-0.2540.163-16.977-20.619-24.296195.887-12.024-20.851NA
us-gaap:PaymentsOfDividends ██▇▇▇▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▅▃▃▃▅▂▂▂▃▂▂▂▁▁17.67217.31416.09515.75215.61615.16314.29314.26414.19414.13812.82212.712.51412.46710.8429.5169.5129.4298.298.2168.3411.3858.1157.4437.44212.156.756.756.7528.4236.7396.746.7384.2024.202NANANA16.78216.111NANA14.42914.278NA
us-gaap:Dividends ███▇▇▇▇▆▆▆▆▆▆▅▅▅▄▄▄▃▃▃▇▃▃▃▅▂▂▂▃▂▂▂▁▁17.78517.6917.33216.11115.76815.63215.55714.66214.62814.55514.49513.14513.02512.8912.84711.1659.8369.8279.7418.5688.5428.53415.8978.1167.4427.44212.156.756.756.7528.4246.7396.7396.7384.2024.202NANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value447000.0444000.0436000.0427000.0418000.0414000.0414000.0412000.0411000.0409000.0409000.0405000.0403000.0397000.0397000.0395000.0347000.0346000.0344000.0339000.0337000.0337000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0299000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.00.00.00.10.10.10.10.10.10.10.10.1

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-01-052011-12-312010-12-312009-12-31
Value4444434241414141414040404039393934340.0343930.0338720.0337350.0337010.033422333333417333333333333333333333333332924
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value44434241414141404039393834343333333333333333333333333333322927
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value44434241414141404039393834343333333333333333333333333333322927
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.280.40.790.270.260.30.330.280.320.260.320.270.330.250.320.240.430.28
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.280.40.770.270.260.30.330.280.320.260.320.270.330.250.330.240.430.280.240.260.40.230.590.210.34-0.04-0.10.30.20.290.151.250.380.310.17-0.10.110.19-0.580.160.450.35
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1032000.0905000.0663000.0867000.0868000.0732000.0665000.0664000.0665000.0474000.0468000.0461000.0463000.0385000.0354000.0341000.0353000.0302000.0273000.0392000.0386000.0375000.0
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues2.72.41.82.32.32.11.91.81.91.41.31.31.41.21.01.21.21.10.91.41.31.3

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:MortgageLoansOnRealEstateOriginalLoanAmount, us-gaap:DebtInstrument

us-gaap:GainsLossesOnExtinguishmentOfDebt

gty:FifthAmendedAndRestatedPrudentialAgreement, gty:SeriesANote


Gains
Period End2021-06-302021-03-31
Value0-1233000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0
Percentage of Revenues0.0-3.3
Percentage of Revenues gty:FifthAmendedAndRestatedPrudentialAgreement gty:SeriesANote0.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value5.0555.5094.5274.1544.5454.0683.7673.6413.7983.9773.6633.5563.8553.5873.3173.3953.6733.4933.0473.2573.8064.0444.0634.2444.8353.7893.7933.8654.4653.6544.22-4.6132.3573.4672.9754.9631013132.6872.7364.8852.2141.8061.82
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues13.114.812.211.012.311.510.510.011.111.710.410.211.311.29.811.512.612.610.311.413.314.213.614.218.415.314.815.617.915.017.2-15.89.414.612.521.538.441.242.09.69.819.310.08.28.4

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value68000.0284000.035000.025000.039000.0251000.031000.026000.025000.0222000.020000.0-22000.02000.0244000.0-231000.0-57000.0-153000.0246000.0-3000.0-1000.0262000.0110000.02000.0131000.0185000.023000.0-54000.097000.097000.0176000.0-277000.0124000.029000.0297000.0393000.0239000.0107000.071000.0152000.0-31000.081000.065000.084000.029000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.20.80.10.10.10.70.10.10.10.70.1-0.10.00.8-0.7-0.2-0.50.9-0.0-0.00.90.40.00.40.70.1-0.20.40.40.7-1.10.40.11.21.71.00.40.20.5-0.10.30.30.40.1

Interest And Fee Income Loans And Leases

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestAndFeeIncomeLoansAndLeases


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value415000.0329000.0655000.0709000.0668000.0713000.0693000.0736000.0728000.0762000.0773000.0792000.0759000.0764000.0733000.0752000.0748000.0758000.0773000.0786000.0865000.01118000.01226000.0910000.0781000.0781000.0858000.0817000.0756000.0714000.0930000.0707000.0962000.0798000.0775000.0726000.0700000.0681000.0757000.0755000.0741000.0405000.032000.034000.035000.0
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues1.10.91.81.91.82.01.92.02.12.22.22.32.22.42.22.62.62.72.62.83.03.94.13.03.03.23.33.33.02.93.82.43.83.43.33.12.52.12.42.72.71.60.10.20.2

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.1556.1296.0246.7056.6816.6756.4536.2475.9865.9465.926.065.3145.055.0914.3194.284.084.0354.1564.1554.2154.2794.4793.3532.3832.3762.4162.4342.582.7013.0742.9982.8942.862.8962.6921.4831.0461.4141.3461.3191.1181.1161.322
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.916.416.217.718.118.918.017.117.517.516.917.515.515.715.014.714.714.813.614.614.514.814.414.912.89.69.39.79.710.611.010.511.912.212.112.59.84.63.35.04.85.25.15.16.1

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value5.9395.8146.4376.466.4076.3475.6615.7945.8165.7595.435.4494.7855.1264.6014.094
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.415.617.417.017.317.915.815.917.016.915.515.714.016.013.513.9

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1217331110121311131013101310139.34159.7048.3288.804137.703197.03511-1.137-3.092106.6379.6385.0454112105.801-3.4653.6266.485-19.4825.351511121313
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues33.348.191.231.429.735.938.232.638.532.137.631.539.531.238.331.752.035.128.030.947.527.166.823.544.3-4.6-12.041.226.539.620.6143.150.743.524.4-15.013.220.3-61.719.154.644.956.560.764.1

us-gaap:NetIncomeLoss us-gaap:Dividends

us-gaap:DividendPaid


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1217331110121311131013101310139.34159.7048.3288.804137.703197.03511-1.137-3.092106.6379.638
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues33.348.191.231.429.735.938.232.638.532.137.631.539.531.238.331.752.035.128.030.947.527.166.823.544.3-4.6-12.041.226.539.6
Percentage of Revenues us-gaap:DividendPaid0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1823201817181912171620171514141214131312121113117.7722.535-0.3359.9759.184101.28818108.5016.4124.2073.4957.128-18.7556.2691612131413
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues48.764.456.348.147.553.455.534.351.649.059.249.546.444.241.743.249.848.346.544.742.740.243.737.329.610.3-1.340.236.741.85.362.743.135.727.018.212.722.3-59.422.358.849.660.866.663.8

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.2080.064200.3760.0610.4950.2475.6371.5040.2052.22-0.0780.2240.3633.5260.8813.8760.2340.6070.6440.799-0.024100.1217.3790.004-0.0690.0480.0370.1310.0490.019-0.0010.0350.0590.211-0.0010.333-0.0630.122-0.0490.0060.0480.0010.018
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.50.254.51.00.21.40.715.54.40.66.3-0.20.71.110.43.013.30.82.02.32.8-0.136.20.428.10.0-0.30.20.10.50.20.1-0.00.10.20.9-0.01.0-0.20.4-0.20.00.20.00.1

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value121733111012131113101310131013
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues33.348.191.231.429.735.938.232.638.532.137.631.539.531.238.3

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value383737373735353634343534343234292927292828282929262425242524242925232323273131282725222121
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1364134213491323126412691211119311771147115911301115106110721004887876877871873893899906916682687651654664682689704650640639647643635623636427
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value678661689705670682622608592569578558548509519456445441446451457483492504513284280229235245267270321274267268269264262223234112
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets49.749.351.153.353.053.851.451.050.449.649.949.449.248.048.445.550.250.450.951.852.454.154.855.656.041.640.835.236.137.039.239.345.642.141.842.041.641.141.435.936.826.3

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1364134213491323126412691211119311771147115911301115106110721004887876877871873893899906916682687651654664682689704650640639647643635623636427
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312012-01-052011-12-312011-09-302011-06-302010-12-312009-12-31
Value685680659617594586589584584578581572566551553547442434430419416410406402403398407422418418415418382376372370378378372372399402314207
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets50.350.748.946.747.046.248.649.049.650.450.150.650.852.051.654.549.849.649.148.247.645.945.244.444.058.459.264.863.963.060.860.754.457.958.258.058.458.90.058.664.163.273.70.0

us-gaap:StockholdersEquity us-gaap:Dividends

us-gaap:DividendPaid


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-01-05
Value-68.101-63.206-63.443-79.942-75.715-70.92-67.102-65.253-62.481-61.051-57.423-56.118-53.917-54.432-51.574-51.763-49.938-55.208-55.085-53.672-53.908-58.942-58.111-62.107-61.026-65.203-56.624-41.382-44.867-44.754-47.64-89.011-88.852
Percentage of StockholdersEquity-9.9-9.3-9.6-12.9-12.7-12.1-11.4-11.2-10.7-10.6-9.9-9.8-9.5-9.9-9.3-9.4-11.3-12.7-12.8-12.8-13.0-14.4-14.3-15.4-15.1-16.4-13.9-9.8-10.7-10.7-11.5-23.9-23.9
Percentage of Assets-5.0-4.7-4.7-6.0-6.0-5.6-5.5-5.5-5.3-5.3-5.0-5.0-4.8-5.1-4.8-5.2-5.6-6.3-6.3-6.2-6.2-6.6-6.5-6.8-6.7-9.5-8.2-6.4-6.9-6.7-7.0-13.90.0
Percentage of Assets us-gaap:DividendPaid0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-01-052011-12-312010-12-312009-12-31
Value753743722697669656656649646638638627620605604599491489485473469468464464463463463463462462462462461461461461461460460368259
Percentage of StockholdersEquity109.9109.2109.6112.9112.7112.0111.3111.1110.6110.5109.8109.7109.4109.8109.2109.4111.2112.6112.7112.7112.9114.3114.2115.4115.1116.3113.8109.7110.6110.6111.4110.5120.7122.6123.8124.3121.8123.8123.8116.9124.9
Percentage of Assets55.255.453.552.753.051.854.154.454.955.755.155.655.657.156.459.655.455.955.454.353.852.551.651.250.667.967.471.170.769.767.867.165.670.972.072.171.20.072.586.20.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-01-052011-12-312010-12-312009-12-31
Value0.4470.4440.4360.4270.4180.4140.4140.4120.4110.4090.4090.4050.4030.3970.3970.3950.3470.3460.3440.3390.3370.3370.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.2990.248
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.00.00.00.10.10.10.10.00.10.10.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312012-01-052011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value19315558253521352519461818181918141812106.8118.1123.9423.7569.7866.643.1118.3967.7017.922124.676.77918161618167.6987.6981414236.1223.587103.052.178
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.42.44.14.42.02.81.83.02.21.74.01.61.61.71.91.81.62.11.41.20.80.90.40.41.11.00.51.31.21.21.80.71.02.92.62.62.92.50.01.22.22.30.01.40.00.00.00.0

Land

us-gaap:Land

us-gaap:Land


Land
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value717712707687681674669656651630631629619587589552475474474474474475475477483341344344344342342351351307318320344345345352353253
Percentage of Land100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.653.052.452.053.953.255.255.055.355.054.555.755.655.455.055.053.654.154.054.454.353.252.952.652.850.050.152.952.751.650.351.049.947.349.850.253.153.854.456.655.559.3

Construction In Progress Gross

us-gaap:ConstructionInProgressGross

us-gaap:ConstructionInProgressGross


Construction
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value774000.0750000.0734000.01141000.0965000.0897000.02080000.02144000.02264000.02023000.02168000.03333000.02392000.01948000.01682000.01266000.01120000.0622000.0426000.0266000.0228000.044000.0955000.0
Percentage of ConstructionInProgressGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.20.20.20.20.20.30.20.20.20.10.10.10.00.00.00.00.1

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:BalanceSheetLocation, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsNet

gty:PrepaidExpensesAndOtherAssets, gty:AboveMarketLeaseAndBelowMarketLease


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3.8592.2983.53.1892.5273.0213.33.784
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.30.30.30.30.50.6
Percentage of Assets gty:PrepaidExpensesAndOtherAssets gty:AboveMarketLeaseAndBelowMarketLease0.00.00.00.00.00.00.00.0

gty:PrepaidExpensesAndOtherAssets, us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value4941383520
Percentage of FiniteLivedIntangibleAssetsNet1270.61784.71101.21119.6830.4
Percentage of Assets3.63.43.33.32.4
Percentage of Assets gty:PrepaidExpensesAndOtherAssets us-gaap:LeasesAcquiredInPlace0.00.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm

gty:BelowMarketLeasesOne, gty:Lessee


Finite
Period End2020-12-31
Value0.031
Percentage of FiniteLivedIntangibleAssetsNet0.8
Percentage of Assets0.0
Percentage of Assets gty:BelowMarketLeasesOne gty:Lessee0.0

gty:BelowMarketLeasesOne, gty:Lessor


Finite
Period End2020-12-31
Value18
Percentage of FiniteLivedIntangibleAssetsNet486.8
Percentage of Assets1.4
Percentage of Assets gty:BelowMarketLeasesOne gty:Lessor0.0

us-gaap:AboveMarketLeases, gty:Lessor


Finite
Period End2020-12-31
Value3.828
Percentage of FiniteLivedIntangibleAssetsNet99.2
Percentage of Assets0.3
Percentage of Assets us-gaap:AboveMarketLeases gty:Lessor0.0

us-gaap:LeasesAcquiredInPlace, gty:Lessor


Finite
Period End2020-12-31
Value49
Percentage of FiniteLivedIntangibleAssetsNet1270.6
Percentage of Assets3.6
Percentage of Assets us-gaap:LeasesAcquiredInPlace gty:Lessor0.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value22232417171921222324
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.71.81.31.41.51.71.92.02.1

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value540522547557522532467446437411441421411371379318308298298
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.639.040.642.141.341.938.537.437.135.938.137.336.935.035.331.734.834.134.0

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
Value3734000.03680000.03780000.02738000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.30.30.30.2

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3588000.03532000.03680000.02617000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.30.30.30.2

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
Value3211000.03155000.03532000.02461000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.20.20.30.2

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value3155000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.2

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value13
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets1.0

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
Value24242517181921232425
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.81.81.91.41.51.61.82.02.12.2

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value29303122
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets2.22.32.31.7

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value5899000.06152000.06453000.04950000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.40.50.50.4

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312012-01-052011-12-312011-09-302011-06-302010-12-312009-12-31
Value685680659617594586589584584578581572566551553547442434430419416410406402403398407422418418415418382376372370378378372372399402314207
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets50.350.748.946.747.046.248.649.049.650.450.150.650.852.051.654.549.849.649.148.247.645.945.244.444.058.459.264.863.963.060.860.754.457.958.258.058.458.90.058.664.163.273.70.0

us-gaap:StockholdersEquity us-gaap:Dividends

us-gaap:DividendPaid


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-01-05
Value-68.101-63.206-63.443-79.942-75.715-70.92-67.102-65.253-62.481-61.051-57.423-56.118-53.917-54.432-51.574-51.763-49.938-55.208-55.085-53.672-53.908-58.942-58.111-62.107-61.026-65.203-56.624-41.382-44.867-44.754-47.64-89.011-88.852
Percentage of StockholdersEquity-9.9-9.3-9.6-12.9-12.7-12.1-11.4-11.2-10.7-10.6-9.9-9.8-9.5-9.9-9.3-9.4-11.3-12.7-12.8-12.8-13.0-14.4-14.3-15.4-15.1-16.4-13.9-9.8-10.7-10.7-11.5-23.9-23.9
Percentage of Assets-5.0-4.7-4.7-6.0-6.0-5.6-5.5-5.5-5.3-5.3-5.0-5.0-4.8-5.1-4.8-5.2-5.6-6.3-6.3-6.2-6.2-6.6-6.5-6.8-6.7-9.5-8.2-6.4-6.9-6.7-7.0-13.90.0
Percentage of Assets us-gaap:DividendPaid0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-01-052011-12-312010-12-312009-12-31
Value753743722697669656656649646638638627620605604599491489485473469468464464463463463463462462462462461461461461461460460368259
Percentage of StockholdersEquity109.9109.2109.6112.9112.7112.0111.3111.1110.6110.5109.8109.7109.4109.8109.2109.4111.2112.6112.7112.7112.9114.3114.2115.4115.1116.3113.8109.7110.6110.6111.4110.5120.7122.6123.8124.3121.8123.8123.8116.9124.9
Percentage of Assets55.255.453.552.753.051.854.154.454.955.755.155.655.657.156.459.655.455.955.454.353.852.551.651.250.667.967.471.170.769.767.867.165.670.972.072.171.20.072.586.20.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-01-052011-12-312010-12-312009-12-31
Value0.4470.4440.4360.4270.4180.4140.4140.4120.4110.4090.4090.4050.4030.3970.3970.3950.3470.3460.3440.3390.3370.3370.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.3340.2990.248
Percentage of StockholdersEquity0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.00.00.00.10.10.10.10.00.10.10.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value447000.0444000.0436000.0427000.0418000.0414000.0414000.0412000.0411000.0409000.0409000.0405000.0403000.0397000.0397000.0395000.0347000.0346000.0344000.0339000.0337000.0337000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0334000.0299000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.00.00.00.10.10.10.10.10.10.10.10.1

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value753743722697669656656649646638638627620605604599491489485473469468464464463463463463462462462462461461461461461460460460460368
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.255.453.552.753.051.854.154.454.955.755.155.655.657.156.459.655.455.955.454.353.852.551.651.250.667.967.471.170.769.767.867.165.670.972.072.171.271.672.573.972.386.2

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:AdditionalPaidInCapital, gty:AtTheMarketEquityOfferingProgram


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value9.3120242611-0.0275.3322.1536.678-0.017
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital gty:AtTheMarketEquityOfferingProgram0.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock, gty:AtTheMarketEquityOfferingProgram


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value0.0020.0080.0090.0090.0040.0010.0010.002
Percentage of StockIssuedDuringPeriodValueNewIssues0.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock gty:AtTheMarketEquityOfferingProgram0.00.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:SubsidiarySaleOfStock

gty:AtTheMarketEquityOfferingProgram


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value9.31220242611-0.0275.3332.1546.68-0.017
Percentage of StockIssuedDuringPeriodValueNewIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0
Percentage of Assets gty:AtTheMarketEquityOfferingProgram0.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value201929201417182616141615131716188.836123.923139.5779.4411510176.3226.8368.585.8537.9684.877283.4466.5993.6351.8142.1798.2578.5361916161414
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues53.352.178.854.940.350.552.372.649.343.048.145.439.353.948.762.530.446.813.248.933.533.251.535.965.825.626.634.623.432.719.998.313.727.715.37.87.925.927.069.158.766.863.565.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-42.309-19.785-29.174-33.278-11.883-53.082-43.517-13.553-27.8092.326-4.453-19.191-53.7661.479-68.641-122.341-13.234-2.001-5.219-0.85162.4054.9321.155-213.7072.896-3.3835.8729.627111433-57.7052.652.2810.8210.48-0.0312.130.304-0.554-195.5290.5410.023
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-109.4-53.1-78.7-87.8-32.1-150.1-121.3-37.2-81.16.8-12.7-55.3-157.04.6-201.9-415.2-45.6-7.2-17.6-3.057.38.516.63.9-814.411.7-13.223.638.546.860.0114.5-229.911.19.63.61.7-0.16.71.1-2.0-771.32.40.1

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value8.718-22.866-3.34745-13.8444910-2.80517-44.639164.07240-20.464541070.843-5.3143.632-9.707-27.26-7.676-20.079-17.947199-5.689-8.738-13.757-15.701-23.47-12.222-64.36342-7.399-5.427-4.74-0.2540.163-16.977-20.619-24.296195-12.024-20.851
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues22.5-61.3-9.0120.6-37.4139.930.1-7.750.5-131.146.611.7118.5-63.7159.0364.92.9-19.212.2-34.0-95.3-27.0-67.4-59.8760.5-23.0-34.0-55.4-62.8-96.5-49.9-220.0168.6-31.1-22.9-20.5-0.90.5-53.8-73.5-87.2772.7-54.4-94.8

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-12.994-23.244-3.29833-10.81214-13.917106.421-27.658280.6180.26-1.6861.9533.588
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-33.6-62.3-8.987.7-29.240.3-38.827.718.7-81.282.01.80.8-5.25.712.2

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value259000.0259000.0272000.0260000.0261000.0260000.0261000.0240000.0235000.0235000.0235000.0233000.0209000.0194000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.824-1.215-0.4040.4072.506-1.4610.4030.5561.038-1.2570.4220.4862.096-2.191.2280.0891.663-1.6852.11-0.4281.473-0.773-0.4820.6730.2811.0740.3920.9070.61-1.1791.337-20.672-0.165-1.3470.880.0927.4797.397130.993-0.3110.2460.368-0.023
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value201929201417182616141615131716188.836123.923139.5779.4411510176.3226.8368.585.8537.9684.877283.4466.5993.6351.8142.1798.2578.5361916161414
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues53.352.178.854.940.350.552.372.649.343.048.145.439.353.948.762.530.446.813.248.933.533.251.535.965.825.626.634.623.432.719.998.313.727.715.37.87.925.927.069.158.766.863.565.2

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1217331110121311131013101310139.34159.7048.3288.804137.703197.03511-1.137-3.092106.6379.6385.0454112105.801-3.4653.6266.485-19.4825.351511121313
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues33.348.191.231.429.735.938.232.638.532.137.631.539.531.238.331.752.035.128.030.947.527.166.823.544.3-4.6-12.041.226.539.620.6143.150.743.524.4-15.013.220.3-61.719.154.644.956.560.764.1

us-gaap:NetIncomeLoss us-gaap:Dividends

us-gaap:DividendPaid


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value1217331110121311131013101310139.34159.7048.3288.804137.703197.03511-1.137-3.092106.6379.638
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues33.348.191.231.429.735.938.232.638.532.137.631.539.531.238.331.752.035.128.030.947.527.166.823.544.3-4.6-12.041.226.539.6
Percentage of Revenues us-gaap:DividendPaid0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value121733111012131113101310131013
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues33.348.191.231.429.735.938.232.638.532.137.631.539.531.238.3

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1032000.0905000.0663000.0867000.0868000.0732000.0665000.0664000.0665000.0474000.0468000.0461000.0463000.0385000.0354000.0341000.0353000.0302000.0210000.0175000.0195000.0177000.0163000.0169000.0168000.0143000.0128000.0121000.0
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-42.309-19.785-29.174-33.278-11.883-53.082-43.517-13.553-27.8092.326-4.453-19.191-53.7661.479-68.641-122.341-13.234-2.001-5.219-0.85162.4054.9321.155-213.7072.896-3.3835.8729.627111433-57.7052.652.2810.8210.48-0.0312.130.304-0.554-195.5290.5410.023
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-109.4-53.1-78.7-87.8-32.1-150.1-121.3-37.2-81.16.8-12.7-55.3-157.04.6-201.9-415.2-45.6-7.2-17.6-3.057.38.516.63.9-814.411.7-13.223.638.546.860.0114.5-229.911.19.63.61.7-0.16.71.1-2.0-771.32.40.1

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value8.718-22.866-3.34745-13.8444910-2.80517-44.639164.07240-20.464541070.843-5.3143.632-9.707-27.26-7.676-20.079-17.947199-5.689-8.738-13.757-15.701-23.47-12.222-64.36342-7.399-5.427-4.74-0.2540.163-16.977-20.619-24.296195-12.024-20.851
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues22.5-61.3-9.0120.6-37.4139.930.1-7.750.5-131.146.611.7118.5-63.7159.0364.92.9-19.212.2-34.0-95.3-27.0-67.4-59.8760.5-23.0-34.0-55.4-62.8-96.5-49.9-220.0168.6-31.1-22.9-20.5-0.90.5-53.8-73.5-87.2772.7-54.4-94.8

Payments Of Dividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-11-252015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-302010-12-312010-09-30
Value1717161515151414141412121212109.5169.5129.4298.298.2168.34112.9418.1157.4437.442126.756.756.7528.4236.7396.746.7384.2024.20216161414
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Dividends

us-gaap:Dividends

us-gaap:Dividends


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value171717161515151414141413131212119.8369.8279.7418.5688.5428.534158.1167.4427.442126.756.756.7528.4246.7396.7396.7384.2024.202
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends us-gaap:Dividends

us-gaap:DividendPaid


Dividendsus-gaap:
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value171717161515151414141413131212119.8369.8279.7418.5688.5428.534158.1167.4427.442126.756.756.752
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue

gty:AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value788000.0421000.0650000.0867000.0868000.0487000.0665000.0664000.0665000.0359000.0468000.0461000.0463000.0385000.0355000.0338000.0
Percentage of AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value787000.0421000.0650000.0867000.0868000.0487000.0665000.0664000.0665000.0359000.0468000.0461000.0463000.0385000.0355000.0338000.0
Percentage of AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue99.9100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Adjustment
Period End2021-06-30
Value1000.0
Percentage of AdjustmentToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodIncreaseDecreaseInRecognitionValue0.1

gty:AmortizationOfAboveMarketAndBelowMarketLeases

gty:AmortizationOfAboveMarketAndBelowMarketLeases


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value27000.057000.066000.068000.072000.0108000.0129000.0152000.0170000.0172000.0184000.0265000.0174000.0185000.0177000.0117000.040000.034000.069000.0142000.0152000.0271000.0127000.0135000.0754000.0163000.0
Percentage of AmortizationOfAboveMarketAndBelowMarketLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:AmortizationOfInvestmentInDirectFinancingLease

gty:AmortizationOfInvestmentInDirectFinancingLease


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-31
Value1198000.01145000.01121000.01068000.01039000.0982000.0939000.0892000.0868000.0827000.0805000.0762000.0743000.0705000.0675000.0636000.0621000.0579000.0539000.0505000.0494000.0463000.0451000.0419000.0412000.0384000.0378000.0349000.0343000.0312000.0290000.0219000.0
Percentage of AmortizationOfInvestmentInDirectFinancingLease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:AmountOfCreditsToEnvironmentalExpenses

gty:AmountOfCreditsToEnvironmentalExpenses


Amount
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value731000.0308000.01047000.0861000.0440000.0788000.04531000.0296000.0218000.0341000.0640000.071000.096000.0512000.01925000.0304000.0375000.0352000.01356000.0211000.02136000.0512000.0
Percentage of AmountOfCreditsToEnvironmentalExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:AssetImpairmentChargesContinuingAndDiscontinuingOperations

gty:AssetImpairmentChargesContinuingAndDiscontinuingOperations


Asset
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.7761.3951.3250.5071.0311.6120.9280.7010.7711.3620.8311.162.817
Percentage of AssetImpairmentChargesContinuingAndDiscontinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:ChangesInEnvironmentalEstimates

gty:ChangesInEnvironmentalEstimates


Changes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value53000.039000.024000.057000.041000.032000.045000.0104000.0126000.049000.0225000.030000.045000.0260000.0
Percentage of ChangesInEnvironmentalEstimates100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:CollectionOfNotesAndMortgagesReceivable

gty:CollectionOfNotesAndMortgagesReceivable


Collection
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0.3760.535153.8011.1442.6910.1731.4230.8981.9050.2791.2780.9260.6510.3780.740.480.2780.5740.279151.6161.4170.9030.40.9271.040.740.4390.564108.2950.7821.726
Percentage of CollectionOfNotesAndMortgagesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:CostsAndExpensesBeforeGainsLossesFromSaleOfProperties

gty:CostsAndExpensesBeforeGainsLossesFromSaleOfProperties


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2020191919171623171717171818
Percentage of CostsAndExpensesBeforeGainsLossesFromSaleOfProperties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:DepreciationAndAmortizationForCapitalizedAssetRetirementCosts

gty:DepreciationAndAmortizationForCapitalizedAssetRetirementCosts


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value996000.0975000.01022000.01003000.0993000.01002000.01026000.01028000.01031000.01047000.01049000.01107000.01051000.01048000.01066000.01096000.01080000.01105000.01192000.01253000.01339000.01342000.01351000.01424000.01586000.01636000.0482000.0388000.0355000.0335000.0361000.0406000.0464000.0778000.0879000.01324000.01359000.01809000.0
Percentage of DepreciationAndAmortizationForCapitalizedAssetRetirementCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:DividendsDeclaredButNotYetPaid

gty:DividendsDeclaredButNotYetPaid


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.095171.2210.3430.136150.8950.0340.073141.350.120.135121.6811.3380.09.827
Percentage of DividendsDeclaredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

gty:EnvironmentalRemediationCostsPaid

gty:EnvironmentalRemediationCostsPaid


Environmental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value1.3810.6131.5931.3882.0491.3252.2641.4082.341.5323.0552.2913.0451.53.3082.1163.5643.9567.7873.262.9653.6218.5554.023.6152.9334.0822.0063.4093.9513.0674.0283.6861.6152.611.1170.7470.4151.5060.931
Percentage of EnvironmentalRemediationCostsPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:IncomeStatementLeaseRevenue

gty:IncomeStatementLeaseRevenue


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value343333323131303029292929282727242423242323232323213.5121919192.722
Percentage of IncomeStatementLeaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:IncreaseDecreaseInCashHeldForPropertyAcquisitions

gty:IncreaseDecreaseInCashHeldForPropertyAcquisitions


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1.233-1.7333.2980.01-0.25-0.690.815-0.2780.023-0.050.130.020.130.15-0.635-2.3222.798-2.1872.06-0.1610.317-0.01-3.222.565-1.654-0.535-3.271.964-10.089-4.8319.5876.207-12.11312-1.6721.2711.4440.5720.899-0.0890.0-0.06-0.4820.06
Percentage of IncreaseDecreaseInCashHeldForPropertyAcquisitions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

gty:IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities

gty:IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-5000.0-160000.0-73000.0-9000.0-12000.063000.0-76000.00-29000.0-242000.0-209000.0-1000.0-6000.0-44000.0
Percentage of IncreaseDecreaseInCustomerSecurityDepositsFinancingActivities100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

gty:IncreaseDecreaseInDeferredRentReceivable

gty:IncreaseDecreaseInDeferredRentReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value778000.0736000.0455000.0820000.0851000.0777000.0896000.0849000.0830000.0955000.0898000.0971000.01020000.01223000.0-6184000.0794000.0934000.0812000.0
Percentage of IncreaseDecreaseInDeferredRentReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:IncreaseInCarryingValueOfProperty

gty:IncreaseInCarryingValueOfProperty


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value0.2890.9220.3250.830.6290.812-1.8251.3661.5750.7592.0840.9110.9881.1281.9171.9060.0941.565.9620.8762.1272.3813.3932.1391.4745.279542.8422.3612.5983.7143.9162.9011.841.290.7292.2321.459
Percentage of IncreaseInCarryingValueOfProperty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:IssuanceOfNotesAndMortgagesReceivable

gty:IssuanceOfNotesAndMortgagesReceivable


Issuance
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302018-12-312018-09-302013-06-302013-03-312012-06-302012-03-312011-12-312011-09-30
Value2.6888.3950.00.8010.0-0.0060.2880.102-0.782-1.726-0.295-0.6331.068-0.24
Percentage of IssuanceOfNotesAndMortgagesReceivable100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted

gty:NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value121733111012131112101210139.849129.214149.5768.2258.693137.594196.93911-1.228-3.212106.5719.5324.972411210
Percentage of NetIncomeLossAvailableToCommonStockholdersBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:OperatingCashFlowsForFinancingLeases

gty:OperatingCashFlowsForFinancingLeases


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value156000.0163000.0170000.0177000.0183000.0201000.0206000.0
Percentage of OperatingCashFlowsForFinancingLeases100.0100.0100.0100.0100.0100.0100.0

gty:PaymentsInSettlementOfRestrictedStockUnits

gty:PaymentsInSettlementOfRestrictedStockUnits


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312017-12-312017-09-302016-12-312016-09-30
Value244000.0484000.013000.000244000.0000115000.002000.01000.00
Percentage of PaymentsInSettlementOfRestrictedStockUnits100.0100.0100.00.00.0100.00.00.00.0100.00.0100.0100.00.0

gty:PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs us-gaap:FairValueByFairValueHierarchyLevel

gty:PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs

us-gaap:FairValueInputsLevel3


Percentage
Period End2021-06-302021-03-312020-12-31
Value02.00
Percentage of PercentageAnnualAssumedAverageRentIncreasesUnobservableInputs0.0100.00.0

gty:ProceedsFromSaleOfInvestmentRealEstate

gty:ProceedsFromSaleOfInvestmentRealEstate


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value284000.08497000.04033000.0219000.0330000.0851000.0966000.00515000.077000.01662000.065000.0971000.0605000.0329000.0492000.0613000.01305000.02155000.0244000.0953000.0605000.01148000.03818000.0513000.0125000.0396000.0
Percentage of ProceedsFromSaleOfInvestmentRealEstate100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:ProceedsOrPaymentsForConstructionInProcess

gty:ProceedsOrPaymentsForConstructionInProcess


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value24000.0127000.0-27000.0206000.0103000.0-7000.07000.0-72000.0279000.0151000.0
Percentage of ProceedsOrPaymentsForConstructionInProcess100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:RealEstateRevenueRecognitionAdjustments

gty:RealEstateRevenueRecognitionAdjustments


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value383000.0343000.0-1201000.0151000.086000.069000.0161000.0185000.0235000.0379000.0355000.0487000.0598000.0782000.0677000.0354000.0526000.0419000.0908000.0797000.0760000.0952000.01850000.01327000.0779000.0575000.0722000.0807000.01535000.02171000.01863000.02203000.01361000.02383000.01439000.01459000.0901000.0634000.0
Percentage of RealEstateRevenueRecognitionAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses

gty:RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value4.283.7563.9575.334.6383.3264.4785.3583.9473.74.834.3324.4613.0685.1123.7993.9242.993
Percentage of RealEstateTaxesAndOtherMunicipalChargesPaidThenReimbursedByTenantsIncludedInRevenuesAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges

us-gaap:AssetImpairmentCharges


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.7560.7761.3951.3250.5071.0311.6120.9280.7010.7710.0940.8321.162.8172.2772.3930.9143.7376.0271.9912.4872.3092.1054.462.8837.913142.9062.0141.6635.7083.2650.4683.9843.397.4062.7830.363170.5871.5130.994
Percentage of AssetImpairmentCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges us-gaap:StatementOperatingActivitiesSegment

gty:CapitalizedAssetRetirementCosts


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.7560.7441.3840.6720.5050.9411.3730.9280.680.7491.3470.6860.8051.012
Percentage of AssetImpairmentCharges100.095.999.250.799.691.385.2100.097.097.11433.082.569.435.9

us-gaap:AssetRetirementObligationAccretionExpense

us-gaap:AssetRetirementObligationAccretionExpense


Asset
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value402000.0461000.0466000.0453000.0456000.0466000.0499000.0475000.0494000.0538000.0572000.0529000.0617000.0691000.0827000.0826000.0762000.01033000.01087000.01056000.01011000.0953000.01310000.01121000.01229000.01169000.01014000.0746000.0666000.0620000.01095000.0818000.0674000.0627000.0924000.0666000.0810000.0774000.0430000.0173000.0160000.0136000.0216000.0214000.0
Percentage of AssetRetirementObligationAccretionExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BelowMarketLeaseAcquired

us-gaap:BelowMarketLeaseAcquired


Below
Period End2020-08-252020-02-262020-02-04
Value0.5231.2471.247
Percentage of BelowMarketLeaseAcquired100.0100.0100.0

us-gaap:BelowMarketLeaseAcquired us-gaap:BusinessAcquisition

gty:PropertiesAcquiredOnAugust2020


Below
Period End2020-08-31
Value0.522
Percentage of BelowMarketLeaseAcquired0.0

gty:PropertiesAcquiredOnMay2021


Below
Period End2021-05-31
Value1.416
Percentage of BelowMarketLeaseAcquired0.0

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

us-gaap:ConcentrationRiskPercentage1

us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk, gty:AproLlc


Concentration
Period End2021-03-312020-03-31
Value12.013.0
Percentage of ConcentrationRiskPercentage1100.0100.0

us-gaap:SalesRevenueNet, us-gaap:CustomerConcentrationRisk, gty:SubsidiariesOfChestnutPetroleumDistInc


Concentration
Period End2021-03-312020-03-31
Value9.011.0
Percentage of ConcentrationRiskPercentage175.084.6

us-gaap:CostOfPropertyRepairsAndMaintenance

us-gaap:CostOfPropertyRepairsAndMaintenance


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5.5645.2725.5546.646.3914.9356.5897.2515.6435.4956.695.5936.4294.935
Percentage of CostOfPropertyRepairsAndMaintenance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value8.6488.4378.1347.6357.3257.0976.596.3216.1516.0996.0676.0685.9075.5945.6244.6784.3944.3924.5215.4114.6164.6224.7824.6293.9773.5852.5153.3722.3372.3222.2642.4142.0072.2932.3893.3293.4873.9872.9652.8222.2042.3052.4932.3912.405
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsShareBasedCompensation

us-gaap:DividendsShareBasedCompensation


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value359000.0395000.0402000.0318000.0318000.0318000.0260000.0246000.0246000.0246000.0203000.0183000.0191000.0183000.0176000.0126000.0187000.0121000.0103000.0111000.0171000.0109000.0187000.096000.0139000.091000.088000.089000.066000.083000.0-3000.0134000.069000.059000.028000.027000.027000.042000.043000.082000.0
Percentage of DividendsShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EnvironmentalExpenseAndLiabilities

us-gaap:EnvironmentalExpenseAndLiabilities


Environmental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-2111000.0-921000.0-2639000.0-2249000.0-2489000.0-2113000.0-6796000.0-1704000.0-2558000.0-1873000.0-3694000.0-2363000.0-3141000.0-2012000.0-4046000.0-2513000.0
Percentage of EnvironmentalExpenseAndLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EnvironmentalRemediationExpense

us-gaap:EnvironmentalRemediationExpense


Environmental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value77000.0513000.0-15000.018000.0830000.0221000.0-2015000.05685000.0855000.0903000.01148000.01178000.01396000.0987000.02136000.0573000.01642000.01732000.01326000.01127000.01549000.0996000.01332000.0
Percentage of EnvironmentalRemediationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestExpense


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value156000.0163000.0170000.0177000.0183000.0201000.0206000.0
Percentage of FinanceLeaseInterestExpense100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value173000.0174000.0172000.0166000.0159000.0139000.0133000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value173000.0174000.0172000.0166000.0159000.0138000.0133000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnCondemnation

us-gaap:GainLossOnCondemnation


Gain
Period End2021-06-302021-03-312020-12-31
Value259000.0-100000.0-3000.0
Percentage of GainLossOnCondemnation100.0100.0100.0

us-gaap:GainLossOnSaleOfProperties

us-gaap:GainLossOnSaleOfProperties


Gain
Period End2021-06-302021-03-312020-12-312015-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.07.3193.4130.835264.1748.4323.0470.5782.7080.5330.3390.310.2510.0680.0520.015
Percentage of GainLossOnSaleOfProperties0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value259000.07219000.03410000.082000.0187000.0869000.0687000.00427000.0-51000.0312000.0-29000.03016000.0649000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate

us-gaap:GainsLossesOnSalesOfInvestmentRealEstate


Gains
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-06-302013-03-31
Value0.2597.2193.410.0820.1870.8690.6870.00.427-0.0510.312-0.0293.0160.6490.7020.1630.507-0.3311.0420.0114.7210.6440.8351.696-0.04-0.218-0.1661.3891.2173.1534.1748.432
Percentage of GainsLossesOnSalesOfInvestmentRealEstate100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-0.244-2.308-11.5830.7760.318-2.83.5016.1750.444-2.0170.6940.6141.025-0.4260.9180.569-0.6790.375-0.9831.081-0.099-1.5810.0131.522.644-0.664-1.012-0.712-0.695-2.5882.0847.227-0.5611.3390.2-0.7740.469-2.9495.3650.937-2.5632.1661.32-1.215
Percentage of IncreaseDecreaseInAccountsPayableAndAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value345000.0477000.0511000.0-173000.0727000.0188000.0204000.0-313000.0-153000.0765000.0325000.0244000.0-96000.0235000.0-566000.0-3611000.03945000.0-257000.0181000.0-141000.0-193000.0-292000.0-63000.0-489000.0433000.0308000.0-368000.0-70000.0-349000.0-3147000.0303000.0-256000.052000.0102000.0254000.03228000.02778000.01744000.055000.0-110000.0216000.0-56000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312015-06-302015-03-312014-06-302014-03-312011-12-312011-09-302011-06-30
Value33000.03000.012000.028000.011000.08000.08000.037000.025000.018000.05000.025000.013000.02000.0000001000.01000.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value1415000.01494000.01348000.01367000.01345000.01527000.01513000.0
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0

us-gaap:MortgageLoanRelatedToPropertySales1

us-gaap:MortgageLoanRelatedToPropertySales1


Mortgage
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value0.00.00.00.7920.280.00.430.02.5250.7881.0730.00.3620.070.00.2550.780.7791.426150.4710.8722.4271.6581.3382.8553.7911.6871.4591.7772.0071.550.26
Percentage of MortgageLoanRelatedToPropertySales10.00.00.0100.0100.00.0100.00.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value1086000.01157000.01014000.0983000.0991000.01126000.01141000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value877000.0753000.0965000.0966000.0971000.01152000.01134000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue

us-gaap:OperatingLeasesIncomeStatementLeaseRevenue


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-08-032014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value38363637363435353333292929282824242315-43.796192221-38.634182219
Percentage of OperatingLeasesIncomeStatementLeaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForCapitalImprovements

us-gaap:PaymentsForCapitalImprovements


Payments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312018-09-302017-12-312017-09-30
Value38000.0176000.0116000.0143000.01000.02916000.0810000.0127000.0301000.0
Percentage of PaymentsForCapitalImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfOrdinaryDividends

us-gaap:PaymentsOfOrdinaryDividends


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value17171515151513141414111312129.8959.8359.8289.7417.678.5428.5348.4568.1157.4437.4427.4256.756.756.7526.7386.756.7526.738
Percentage of PaymentsOfOrdinaryDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireCommercialRealEstate

us-gaap:PaymentsToAcquireCommercialRealEstate


Payments
Period End2021-06-302021-03-312020-12-312020-08-252020-09-302020-06-302020-02-262020-02-042020-03-312019-11-222019-12-312019-09-302019-06-172018-12-31
Value412145283611505057144313243.258
Percentage of PaymentsToAcquireCommercialRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireCommercialRealEstate us-gaap:BusinessAcquisition

gty:ConvenienceStoreGasolineStationAndOtherAutomotiveRelatedProperties


Payments
Period End2020-09-302019-09-30
Value7.83713
Percentage of PaymentsToAcquireCommercialRealEstate21.7100.0

gty:PropertiesAcquiredOnAugust2020


Payments
Period End2020-08-31
Value28
Percentage of PaymentsToAcquireCommercialRealEstate0.0

gty:PropertiesAcquiredOnMarch2021


Payments
Period End2021-03-31
Value13
Percentage of PaymentsToAcquireCommercialRealEstate63.8

gty:PropertiesAcquiredOnMay2021


Payments
Period End2021-05-31
Value31
Percentage of PaymentsToAcquireCommercialRealEstate0.0

gty:PropertiesAcquiredOnOctober2020


Payments
Period End2020-10-31
Value28
Percentage of PaymentsToAcquireCommercialRealEstate0.0

us-gaap:PaymentsToAcquireCommercialRealEstate us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

gty:PropertiesAcquiredInSeparateTransactions


Payments
Period End2021-06-302021-03-31
Value0.07.905
Percentage of PaymentsToAcquireCommercialRealEstate0.036.2

us-gaap:ProceedsFromConstructionLoansPayable us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:ProceedsFromConstructionLoansPayable

us-gaap:AccountingStandardsUpdate201613


Proceeds
Period End2021-06-302021-03-312020-12-31
Value2.6888.3950.0
Percentage of ProceedsFromConstructionLoansPayable100.0100.00.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:CommonStock, gty:AtTheMarketEquityOfferingProgram


Proceeds
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value2426115.3332.1546.6639.4866.93813
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock, gty:TwoThousandEighteenAtTheMarketEquityOfferingProgram


Proceeds
Period End2021-06-302021-03-312020-06-30
Value9.3122011
Percentage of ProceedsFromIssuanceOfCommonStock0.00.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:SubsidiarySaleOfStock

gty:AtTheMarketEquityOfferingProgram


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value9.31220242611-0.0275.3332.1546.68-0.0179.4866.93813-0.0834.9832.6851.584.28112.8190.481
Percentage of ProceedsFromIssuanceOfCommonStock0.00.0100.0100.0100.20.0100.0100.0100.30.0100.0100.0100.60.00.00.00.00.00.00.00.0

us-gaap:ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan

us-gaap:ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan


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
Value18000.018000.017000.016000.016000.0394000.0369000.0364000.0361000.0357000.0323000.0325000.0376000.0379000.0
Percentage of ProceedsFromIssuanceOfCommonStockDividendReinvestmentPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value25500.065400.0305.025207045155.00.00.00.08.00.00.01.5120.00.00.03.01.08.44971
Percentage of ProceedsFromLinesOfCredit100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.0100.0100.00.00.00.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfConstructionLoansPayable us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:RepaymentsOfConstructionLoansPayable

us-gaap:AccountingStandardsUpdate201613


Repayments
Period End2020-12-31
Value0
Percentage of RepaymentsOfConstructionLoansPayable0.0

us-gaap:RepaymentsOfLinesOfCredit

us-gaap:RepaymentsOfLinesOfCredit


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312011-12-312011-09-302010-12-312010-09-30
Value122511015201155.0355.010.01105.010.0355.0550.04.0194.00.00.0336.02.07.09.0186.5650.01500.01812710
Percentage of RepaymentsOfLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations


Repayments
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value174000.0172000.0166000.0159000.0153000.0144000.0139000.0132000.0127000.0124000.0119000.0114000.0111000.0
Percentage of RepaymentsOfLongTermCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2020-12-312020-09-302020-06-302019-09-302019-06-30
Value-8000.041000.012000.062000.033000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesDividendReinvestmentPlan us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesDividendReinvestmentPlan

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value01000.001000.01000.012000.011000.012000.012000.012000.010920.012000.015000.014000.011000.013000.012000.012000.0
Percentage of StockIssuedDuringPeriodSharesDividendReinvestmentPlan0.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:StatementEquityComponents, us-gaap:SubsidiarySaleOfStock

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:CommonStock, gty:AtTheMarketEquityOfferingProgram


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value289000.0743000.0882000.0922000.0404000.00166000.070000.0213000.00321000.0248000.0537000.00
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0

us-gaap:CommonStock, gty:TwoThousandEighteenAtTheMarketEquityOfferingProgram


Stock
Period End2021-06-302021-03-312020-06-30
Value289000.0743000.0404000.0
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensationGross us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesShareBasedCompensationGross

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value47000.017000.05000.00011000.01000.00016000.0
Percentage of StockIssuedDuringPeriodSharesShareBasedCompensationGross100.0100.0100.00.00.0100.0100.00.00.0100.0

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value18000.018000.017000.016000.016000.0394000.0369000.0364000.0361000.0357000.0323000.0325000.0376000.0379000.0324000.0319000.0316000.0312000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueDividendReinvestmentPlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value18000.018000.017000.016000.016000.0394000.0368000.0364000.0361000.0357000.0322000.0325000.0376000.0379000.0324000.0318000.0316000.0312000.0
Percentage of StockIssuedDuringPeriodValueDividendReinvestmentPlan100.0100.0100.0100.0100.0100.099.7100.0100.0100.099.7100.0100.0100.0100.099.7100.0100.0

gty:AboveMarketLeaseAcquired us-gaap:BusinessAcquisition

gty:AboveMarketLeaseAcquired

gty:PropertiesAcquiredOnMay2021


Above
Period End2021-05-31
Value2.224
Percentage of AboveMarketLeaseAcquired100.0

gty:AccruedLegalMatters

gty:AccruedLegalMatters


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value4.2754.2754.275171717171611121212121212111111111111111111111111111111119.0684.0033.7983.6153.7363.7714.242
Percentage of AccruedLegalMatters100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses

gty:CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses


Capital
Period End2021-06-302021-03-312020-12-312020-09-30
Value918000.0918000.0918000.0578000.0
Percentage of CapitalLeasesNetInvestmentInDirectFinancingLeasesAllowanceForCreditLosses100.0100.0100.0100.0

gty:CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived

gty:CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived


Capital
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value109113116119123126129132136139
Percentage of CapitalLeasesNetInvestmentInDirectFinancingLeasesPaymentsToBeReceived100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:FinanceLeaseLiabilityPaymentsDueAfterYearFour

gty:FinanceLeaseLiabilityPaymentsDueAfterYearFour


Finance
Period End2021-06-302021-03-312020-09-30
Value1321000.01433000.01658000.0
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFour100.0100.0100.0

gty:ImpairedRealEstateAssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

gty:ImpairedRealEstateAssetsFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Impaired
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value395000.0395000.01979000.01664000.01170000.0785000.0785000.0550000.0550000.0188000.03096000.02908000.02217000.01716000.02785000.0858000.001504000.0780000.0508000.0810000.0620000.01264000.02496000.03499000.07776000.09266000.01758000.02875000.02859000.09590000.0
Percentage of ImpairedRealEstateAssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:InvestmentBuildingsAndImprovementsGross

gty:InvestmentBuildingsAndImprovementsGross


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value583552537518491488442421413406409403396377379353314306306303303304304306317243246
Percentage of InvestmentBuildingsAndImprovementsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:LeaseAssets

gty:LeaseAssets


Lease
Period End2021-06-302021-03-312020-12-312020-09-30
Value23242518
Percentage of LeaseAssets100.0100.0100.0100.0

gty:LeaseLiabilities

gty:LeaseLiabilities


Lease
Period End2021-06-302021-03-312020-12-312020-09-30
Value27272821
Percentage of LeaseLiabilities100.0100.0100.0100.0

gty:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour

gty:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2021-06-302021-03-312020-09-30
Value131310
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour100.0100.0100.0

gty:LessorOperatingLeasePaymentToBeReceivedAfterYearFour

gty:LessorOperatingLeasePaymentToBeReceivedAfterYearFour


Lessor
Period End2020-09-30
Value744
Percentage of LessorOperatingLeasePaymentToBeReceivedAfterYearFour100.0

gty:NetAssetRetirementCostsRemoved us-gaap:PropertyPlantAndEquipmentByType

gty:NetAssetRetirementCostsRemoved

gty:UndergroundStorageTanks


Net
Period End2021-06-302021-03-312020-12-312020-09-302015-12-312014-12-31
Value101010101010
Percentage of NetAssetRetirementCostsRemoved100.0100.0100.0100.0100.0100.0

gty:NotesAndMortgagesReceivable

gty:NotesAndMortgagesReceivable


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value211911262928303033
Percentage of NotesAndMortgagesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:NotesAndMortgagesReceivable us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ConstructionLoans


Notes
Period End2021-06-302021-03-31
Value118.395
Percentage of NotesAndMortgagesReceivable51.743.9

gty:PercentageOfRentReceivedFromTenants us-gaap:LiabilityForCatastropheClaimsByCatastrophicEvent, us-gaap:SubsequentEventType

gty:PercentageOfRentReceivedFromTenants

gty:COVID19, us-gaap:SubsequentEvent


Percentage
Period End2020-10-22
Value98.0
Percentage of PercentageOfRentReceivedFromTenants100.0

gty:RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsForTaxPurposes

gty:RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsForTaxPurposes


Real
Period End2020-12-31
Value1276000.0
Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovementsForTaxPurposes100.0

gty:RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization

gty:RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization


Real
Period End2020-12-31
Value97000.0
Percentage of RealEstateHeldForSalePropertyAccumulatedDepreciationAndAmortization100.0

gty:RealEstateHeldForSalePropertyAtCost

gty:RealEstateHeldForSalePropertyAtCost


Real
Period End2020-12-31
Value969000.0
Percentage of RealEstateHeldForSalePropertyAtCost100.0

gty:RealEstateHeldForSalePropertyAtCost us-gaap:LongLivedAssetsHeldForSaleByAssetType

us-gaap:BuildingImprovements


Real
Period End2020-12-31
Value483000.0
Percentage of RealEstateHeldForSalePropertyAtCost49.8

us-gaap:Land


Real
Period End2020-12-31
Value486000.0
Percentage of RealEstateHeldForSalePropertyAtCost50.2

gty:RealEstateInvestmentPropertyGross

gty:RealEstateInvestmentPropertyGross


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value1301126512451206117411641113108010671039104310361018967970907791781781777778779781783801584590
Percentage of RealEstateInvestmentPropertyGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:RealEstateInvestmentPropertyHeldForUseNet

gty:RealEstateInvestmentPropertyHeldForUseNet


Real
Period End2021-06-302021-03-312020-12-312019-12-31
Value110110711058947
Percentage of RealEstateInvestmentPropertyHeldForUseNet100.0100.0100.0100.0

gty:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedAfterYearFour

gty:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedAfterYearFour


Sales
Period End2020-09-30
Value59
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedAfterYearFour100.0

gty:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAtSpecifiedDateIntrinsicValue us-gaap:AwardType, us-gaap:PlanName

gty:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAtSpecifiedDateIntrinsicValue

us-gaap:RestrictedStockUnitsRSU, gty:OmnibusIncentiveCompensationPlan


Share
Period End2020-12-31
Value11
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAtSpecifiedDateIntrinsicValue100.0

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages

srt:MortgageLoansOnRealEstateFaceAmountOfMortgages


Mortgage
Period End2020-12-31
Value12
Percentage of MortgageLoansOnRealEstateFaceAmountOfMortgages100.0

srt:MortgageLoansOnRealEstatePriorLiens1

srt:MortgageLoansOnRealEstatePriorLiens1


Mortgage
Period End2020-12-31
Value0
Percentage of MortgageLoansOnRealEstatePriorLiens10.0

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent

us-gaap:AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value444347595858605853536262626263616264636565707373714951525354575548494538383134292918
Percentage of AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccountsReceivableNet

us-gaap:AccountsReceivableNet


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value3303000.02539000.03811000.04281000.03945000.01520000.03063000.02879000.02548000.01522000.03008000.02925000.02989000.01110000.03712000.02780000.03122000.01742000.04118000.02741000.03714000.01754000.02975000.04043000.04405000.04823000.04395000.04446000.03705000.03173000.05106000.08937000.0
Percentage of AccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies

us-gaap:AccrualForEnvironmentalLossContingencies


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-31
Value47484849495050585859596061636364646874788182849193949142414143454545465252595714151412
Percentage of AccrualForEnvironmentalLossContingencies100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccrualForEnvironmentalLossContingencies us-gaap:EnvironmentalRemediationContingency

gty:FutureEnvironmentalLiabilitiesForPreexistingUnknownContamination


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302017-03-312016-12-312015-12-31
Value36363637373738454545454545454544454545
Percentage of AccrualForEnvironmentalLossContingencies75.174.675.675.776.775.375.477.677.576.475.874.073.071.570.869.165.560.453.9

gty:ReasonablyEstimableEnvironmentalRemediationObligation


Accrual
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value11121111111212131313141516181829
Percentage of AccrualForEnvironmentalLossContingencies24.925.424.424.323.324.724.622.422.523.624.226.027.028.529.239.6

us-gaap:AccumulatedDistributionsInExcessOfNetIncome

us-gaap:AccumulatedDistributionsInExcessOfNetIncome


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value6863637975706765626157565354515149555553535858626165564144444744798589
Percentage of AccumulatedDistributionsInExcessOfNetIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

gty:MutualFundsFairValueAsset, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1085000.01000000.0970000.0898000.0850000.0645000.0737000.0707000.0687000.0659000.0534000.0568000.0544000.0538000.0451000.0434000.0422000.0411000.0565000.0
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency

gty:MutualFundsFairValueAsset, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1085000.01000000.0970000.0898000.0850000.0645000.0737000.0707000.0687000.0659000.0534000.0568000.0544000.0538000.0451000.0434000.0422000.0411000.0565000.0
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings


Business
Period End2020-08-252020-02-262020-02-042019-11-222019-09-302019-06-302019-06-17
Value214141109.591.8134.789
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings us-gaap:BusinessAcquisition

gty:OtherAcquisition


Business
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value159.5085.076269.591.813
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings0.00.00.00.0100.0100.0

gty:PropertiesAcquiredOnAugust2020


Business
Period End2020-08-31
Value21
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings0.0

gty:PropertiesAcquiredOnMarch2021


Business
Period End2021-03-31
Value9.997
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings0.0

gty:PropertiesAcquiredOnMarchAprilAndMay2021


Business
Period End2021-06-30
Value18
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings0.0

gty:PropertiesAcquiredOnMay2021


Business
Period End2021-05-31
Value22
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings0.0

gty:PropertiesAcquiredOnOctober2020


Business
Period End2020-10-31
Value9.595
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings us-gaap:BusinessAcquisition, us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

gty:ConvenienceStoreGasolineStationAndOtherAutomotiveRelatedProperties, gty:PropertiesAcquiredInSeparateTransactions


Business
Period End2020-12-31
Value26
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

gty:PropertiesAcquiredInSeparateTransactions


Business
Period End2021-06-302021-03-312020-06-302019-12-31
Value5.3965.3969.50826
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedBuildings0.00.00.00.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand


Business
Period End2020-08-252020-02-262020-02-042019-11-222019-09-302019-06-302019-06-17
Value5.3354.7754.7752.6638.0343.07518
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand us-gaap:BusinessAcquisition

gty:OtherAcquisition


Business
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value9.2367.8861.414188.0343.075
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand0.00.00.00.0100.0100.0

gty:PropertiesAcquiredOnAugust2020


Business
Period End2020-08-31
Value5.335
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand0.0

gty:PropertiesAcquiredOnMarch2021


Business
Period End2021-03-31
Value2.782
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand0.0

gty:PropertiesAcquiredOnMarchAprilAndMay2021


Business
Period End2021-06-30
Value4.081
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand0.0

gty:PropertiesAcquiredOnMay2021


Business
Period End2021-05-31
Value4.551
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand0.0

gty:PropertiesAcquiredOnOctober2020


Business
Period End2020-10-31
Value16
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand us-gaap:BusinessAcquisition, us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

gty:ConvenienceStoreGasolineStationAndOtherAutomotiveRelatedProperties, gty:PropertiesAcquiredInSeparateTransactions


Business
Period End2020-12-31
Value13
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand0.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

gty:PropertiesAcquiredInSeparateTransactions


Business
Period End2021-06-302021-03-312020-06-302019-12-31
Value1.8651.8657.88618
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLand0.00.00.00.0

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeases

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeases


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value747677787980828384858587888889909091929293939494949595969696979791
Percentage of CapitalLeasesNetInvestmentInDirectFinancingLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value4446495153555760626467717376788183868891949699101104107109112114117120
Percentage of CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty

us-gaap:CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value13131313131313131313131313131313131313131313131313131313131313
Percentage of CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsAssetRetirementCosts

us-gaap:CapitalizedCostsAssetRetirementCosts


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value393939403939394646454545444545454647494850505151585959171717182222202335
Percentage of CapitalizedCostsAssetRetirementCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedCostsAssetRetirementCosts us-gaap:EnvironmentalRemediationContingency

gty:FutureEnvironmentalLiabilitiesForPreexistingUnknownContamination


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-03-312015-12-31
Value151516161617172424242525252626272728283030
Percentage of CapitalizedCostsAssetRetirementCosts40.140.240.540.942.743.344.253.153.554.655.456.857.858.958.858.859.560.058.059.759.3

gty:KnownEnvironmentalLiabilities


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value232323232222222121202019181818181818202020202018
Percentage of CapitalizedCostsAssetRetirementCosts59.959.859.559.157.356.755.846.946.545.444.643.242.241.141.241.240.540.042.041.340.040.340.730.8

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value20335760273723372721482019192013
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value542525550560525535470450440415445425415375380320310300300
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Debt
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value17251107585200.06540705040100105453525
Percentage of DebtInstrumentCarryingAmount3.24.519.614.315.94.30.014.89.615.711.89.626.727.614.111.38.3

us-gaap:DebtInstrumentCarryingAmount us-gaap:LongtermDebtType

gty:SeniorUnsecuredNotes


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value525525525450450450450450325325325325325225225225225225
Percentage of DebtInstrumentCarryingAmount96.8100.095.580.485.784.195.7100.073.978.373.076.578.360.059.270.372.675.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1788000.02047000.02307000.02168000.02428000.02689000.02949000.03210000.02894000.03129000.03364000.03599000.03786000.03407000.0842000.01036000.01229000.01397000.01456000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:BalanceSheetLocation, us-gaap:CreditFacility

gty:PrepaidExpensesAndOtherAssets, us-gaap:RevolvingCreditFacility


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value695000.0915000.01135000.01355000.01574000.01794000.02014000.02773000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet38.944.749.262.564.866.768.382.4

us-gaap:DeferredCostsLeasingNet

us-gaap:DeferredCostsLeasingNet


Deferred
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value351000.0270000.0191000.069000.0373000.0171000.093000.093000.0579000.0258000.0228000.028000.0126000.042000.030000.030000.0148000.0148000.0145000.0145000.0120000.090000.090000.090000.060000.060000.060000.00365000.0365000.0365000.0325000.03147000.00
Percentage of DeferredCostsLeasingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0

us-gaap:DeferredRentReceivablesNet

us-gaap:DeferredRentReceivablesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4544444342424140393837363534333231302928272625242322212019181617151512109.4598.5878.08162727
Percentage of DeferredRentReceivablesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueLeasesAccumulatedAmortization us-gaap:PropertyPlantAndEquipmentByType

us-gaap:DeferredRevenueLeasesAccumulatedAmortization

gty:UndergroundStorageTanks


Deferred
Period End2021-06-302021-03-312020-12-312020-09-30
Value1794000.01741000.01688000.01635000.0
Percentage of DeferredRevenueLeasesAccumulatedAmortization100.0100.0100.0100.0

us-gaap:DeferredRevenueLeasesGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:DeferredRevenueLeasesGross

gty:UndergroundStorageTanks


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1211000.01264000.01317000.01370000.02961000.02961000.02837000.02837000.02731000.02478000.02478000.02416000.0
Percentage of DeferredRevenueLeasesGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:DividendsPayableCurrentAndNoncurrent


Dividends
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-302011-06-302010-12-31
Value171717161515151414141413131212119.8359.8279.7428.5688.5428.534158.1177.4427.442126.756.756.7528.4236.7386.7396.7384.2020.08.3911614
Percentage of DividendsPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions us-gaap:AwardType, us-gaap:PlanName

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions

us-gaap:RestrictedStockUnitsRSU, gty:TwoThousandFourIncentivePlan


Employee
Period End2020-12-312016-12-312015-12-312014-12-312013-12-31
Value9321000.02660000.02172000.01318000.02302000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value3195000.03367000.03541000.03714000.03879000.04039000.04191000.04335000.04474000.0
Percentage of FinanceLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value5364000.05691000.06028000.06371000.0
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueAfterYearFive


Finance
Period End2020-12-31
Value1546000.0
Percentage of FinanceLeaseLiabilityPaymentsDueAfterYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value990000.01042000.01273000.01119000.0
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFive


Finance
Period End2020-12-31
Value475000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFive100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour

us-gaap:FinanceLeaseLiabilityPaymentsDueYearFour


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value447000.0444000.0785000.0560000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value646000.0732000.0856000.0781000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value806000.0831000.01093000.0937000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear


Finance
Period End2021-06-302021-03-312020-09-30
Value1154000.01209000.01316000.0
Percentage of FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value2169000.02324000.02487000.02657000.0
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value660000.0707000.0763000.0819000.0875000.0931000.0987000.01043000.01099000.0
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2021-06-302021-03-312020-12-312020-09-30
Value17.317.317.317.27
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLosses us-gaap:AccountsNotesLoansAndFinancingReceivableByReceivableType, us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:FinancingReceivableAllowanceForCreditLosses

gty:NotesAndMortgagesReceivable, us-gaap:AccountingStandardsUpdate201613


Financing
Period End2020-12-312020-06-302020-03-31
Value28000.000
Percentage of FinancingReceivableAllowanceForCreditLosses100.00.00.0

us-gaap:FinancingReceivableAllowanceForCreditLosses us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201613


Financing
Period End2020-12-31
Value340000.0
Percentage of FinancingReceivableAllowanceForCreditLosses1214.3

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases


Finite
Period End2020-08-252020-02-262020-02-042019-11-222019-09-302019-06-302019-06-17
Value2.3963.7273.7271.0120.9760.0881.849
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases us-gaap:BusinessAcquisition

gty:OtherAcquisition


Finite
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value1.5750.9740.5282.7440.9760.088
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases0.00.00.00.0100.0100.0

gty:PropertiesAcquiredOnAugust2020


Finite
Period End2020-08-31
Value2.396
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases0.0

gty:PropertiesAcquiredOnMarch2021


Finite
Period End2021-03-31
Value1.168
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases0.0

gty:PropertiesAcquiredOnMarchAprilAndMay2021


Finite
Period End2021-06-30
Value2.038
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases0.0

gty:PropertiesAcquiredOnMay2021


Finite
Period End2021-05-31
Value3.12
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases0.0

gty:PropertiesAcquiredOnOctober2020


Finite
Period End2020-10-31
Value2.566
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases0.0

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases us-gaap:BusinessAcquisition, us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

gty:ConvenienceStoreGasolineStationAndOtherAutomotiveRelatedProperties, gty:PropertiesAcquiredInSeparateTransactions


Finite
Period End2020-12-31
Value2.995
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases0.0

us-gaap:FiniteLivedIntangibleAssetAcquiredInPlaceLeases us-gaap:BusinessCombinationSeparatelyRecognizedTransactions

gty:PropertiesAcquiredInSeparateTransactions


Finite
Period End2021-06-302021-03-312020-06-302019-12-31
Value0.6440.6440.9742.744
Percentage of FiniteLivedIntangibleAssetAcquiredInPlaceLeases0.00.00.00.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:BalanceSheetLocation, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

gty:PrepaidExpensesAndOtherAssets, gty:AboveMarketLeaseAndBelowMarketLease


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value6.0475.6535.164.6984.213.7153.222.7272.209
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:PrepaidExpensesAndOtherAssets, us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value16139.9087.0435.187
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization277.6230.7192.0149.9123.2

us-gaap:AccountsPayableAndAccruedLiabilities, gty:AboveMarketLeaseAndBelowMarketLease


Finite
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value211917151311108.947.788
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization357.9352.1344.8331.6323.5312.9311.7327.8352.6

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

gty:BelowMarketLeasesOne, gty:Lessor


Finite
Period End2020-12-31
Value11
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:AboveMarketLeases, gty:Lessor


Finite
Period End2020-12-31
Value2.363
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive20.8

us-gaap:LeasesAcquiredInPlace, gty:Lessor


Finite
Period End2020-12-31
Value35
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive309.1

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

gty:BelowMarketLeasesOne, gty:Lessee


Finite
Period End2020-12-31
Value31000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

gty:BelowMarketLeasesOne, gty:Lessor


Finite
Period End2020-12-31
Value1606000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths5180.6

us-gaap:AboveMarketLeases, gty:Lessor


Finite
Period End2020-12-31
Value301000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths971.0

us-gaap:LeasesAcquiredInPlace, gty:Lessor


Finite
Period End2020-12-31
Value2868000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths9251.6

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

gty:BelowMarketLeasesOne, gty:Lessor


Finite
Period End2020-12-31
Value1414000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:AboveMarketLeases, gty:Lessor


Finite
Period End2020-12-31
Value291000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive20.6

us-gaap:LeasesAcquiredInPlace, gty:Lessor


Finite
Period End2020-12-31
Value2690000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive190.2

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

gty:BelowMarketLeasesOne, gty:Lessor


Finite
Period End2020-12-31
Value1437000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:AboveMarketLeases, gty:Lessor


Finite
Period End2020-12-31
Value291000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour20.3

us-gaap:LeasesAcquiredInPlace, gty:Lessor


Finite
Period End2020-12-31
Value2727000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour189.8

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

gty:BelowMarketLeasesOne, gty:Lessor


Finite
Period End2020-12-31
Value1437000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:AboveMarketLeases, gty:Lessor


Finite
Period End2020-12-31
Value291000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree20.3

us-gaap:LeasesAcquiredInPlace, gty:Lessor


Finite
Period End2020-12-31
Value2769000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree192.7

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:LeaseContractualTerm

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

gty:BelowMarketLeasesOne, gty:Lessor


Finite
Period End2020-12-31
Value1528000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:AboveMarketLeases, gty:Lessor


Finite
Period End2020-12-31
Value291000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo19.0

us-gaap:LeasesAcquiredInPlace, gty:Lessor


Finite
Period End2020-12-31
Value2853000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo186.7

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3834000.03780000.03471000.03380000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-30
Value1658000.02522000.0970000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceived


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value1217121412541239
Percentage of LessorOperatingLeasePaymentsToBeReceived100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears


Lessor
Period End2020-12-31
Value117
Percentage of LessorOperatingLeasePaymentsToBeReceivedFiveYears100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value121118118115
Percentage of LessorOperatingLeasePaymentsToBeReceivedFourYears100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value124122120116
Percentage of LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear


Lessor
Period End2021-06-302021-03-312020-09-30
Value629129
Percentage of LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter


Lessor
Period End2021-06-302021-03-312020-12-31
Value663640655
Percentage of LessorOperatingLeasePaymentsToBeReceivedThereafter100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value122119120116
Percentage of LessorOperatingLeasePaymentsToBeReceivedThreeYears100.0100.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears


Lessor
Period End2021-06-302021-03-312020-12-312020-09-30
Value124121121116
Percentage of LessorOperatingLeasePaymentsToBeReceivedTwoYears100.0100.0100.0100.0

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

us-gaap:LiabilitiesFairValueDisclosure

us-gaap:FairValueInputsLevel2, gty:DeferredCompensationFairValueLiability, us-gaap:FairValueMeasurementsRecurring


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1085000.01000000.0970000.0898000.0850000.0645000.0737000.0707000.0687000.0659000.0534000.0568000.0544000.0538000.0451000.0434000.0422000.0411000.0565000.0
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure us-gaap:FairValueByLiabilityClass, us-gaap:FairValueByMeasurementFrequency

gty:DeferredCompensationFairValueLiability, us-gaap:FairValueMeasurementsRecurring


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1085000.01000000.0970000.0898000.0850000.0645000.0737000.0707000.0687000.0659000.0534000.0568000.0544000.0538000.0451000.0434000.0422000.0411000.0565000.0
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit

us-gaap:LineOfCredit


Line
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1725110758520112871179786146154948473123123127146144156166312527344358631217115015115115114714715041
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Line
Period End2021-06-302021-03-312020-12-312020-12-142020-09-302020-06-302020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value1775257511075852065407050401001054535257575799894106116
Percentage of LineOfCredit100.00.0100.00.0100.0100.0100.0100.057.745.759.751.546.068.068.047.741.633.860.660.762.067.065.367.969.9

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value400275275275275275150150150275275175125125125125
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive us-gaap:LongtermDebtType

gty:SeniorUnsecuredNotes


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value400275275275275275150150150225225125125125125125
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0100.0100.0100.0100.0100.0100.0100.0100.081.881.871.4100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2021-06-302018-12-312017-12-31
Value170.0105
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.00.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Long
Period End2021-06-302018-12-312017-12-31
Value170.0105
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.00.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value507512512512550401000.0100100100
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive us-gaap:LongtermDebtType

gty:SeniorUnsecuredNotes


Long
Period End2020-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value50757575750.00.00.00.0100100100
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0100.060.060.060.00.00.00.00.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5050757575750.0654070100100100100505050
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour us-gaap:LongtermDebtType

gty:SeniorUnsecuredNotes


Long
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value5050757575750.00.00.00.01001001001000.00.00.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0100.0100.0100.0100.0100.00.00.00.00.0100.0100.0100.0100.00.00.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value751107585201001001001000.00.00.0500.00.00.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.00.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1107585200.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree us-gaap:LongtermDebtType

gty:SeniorUnsecuredNotes


Long
Period End2020-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value751001001001000.00.00.00.00.00.00.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0100.0100.0100.0100.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value7575251001001001000.00.00.00.00.00.00.00.0453525
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Long
Period End2020-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value250.00.00.00.00.00.00.00.0453525
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.00.00.00.00.00.00.00.00.0100.0100.0100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo us-gaap:LongtermDebtType

gty:SeniorUnsecuredNotes


Long
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value75751001001001000.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MortgageLoansOnRealEstate

us-gaap:MortgageLoansOnRealEstate


Mortgage
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-01-052011-12-312010-12-312009-12-31
Value11303332324834280.022333180.0186380.0012740.001432
Percentage of MortgageLoansOnRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NotesPayableFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:LongtermDebtType

us-gaap:NotesPayableFairValueDisclosure

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring, gty:SeniorUnsecuredNotes


Notes
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value555538549479470447470476346339335328331232233
Percentage of NotesPayableFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-312020-09-30
Value4.84.84.85.32
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent

us-gaap:OperatingLeasesFutureMinimumPaymentsDueCurrent


Operating
Period End2020-12-312019-12-312018-12-31
Value4646000.05515000.06016000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueCurrent100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFiveYears


Operating
Period End2020-12-312019-12-312018-12-31
Value1037000.01560000.02021000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueInFiveYears100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInFourYears


Operating
Period End2020-12-312019-12-312018-12-31
Value2021000.02319000.02766000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueInFourYears100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInThreeYears


Operating
Period End2020-12-312019-12-312018-12-31
Value2675000.03040000.04371000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueInThreeYears100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears

us-gaap:OperatingLeasesFutureMinimumPaymentsDueInTwoYears


Operating
Period End2020-12-312019-12-312018-12-31
Value3374000.04625000.05284000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueInTwoYears100.0100.0100.0

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter

us-gaap:OperatingLeasesFutureMinimumPaymentsDueThereafter


Operating
Period End2020-12-312019-12-312018-12-31
Value1817000.01845000.02754000.0
Percentage of OperatingLeasesFutureMinimumPaymentsDueThereafter100.0100.0100.0

us-gaap:PrepaidExpenseAndOtherAssets

us-gaap:PrepaidExpenseAndOtherAssets


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312011-09-302011-06-302010-12-31
Value73697165646460585757575857545551494043414344474948313236354554453948311010136.669
Percentage of PrepaidExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentFairValueDisclosure us-gaap:ImpairedLongLivedAssetsHeldAndUsedByType

us-gaap:PropertyPlantAndEquipmentFairValueDisclosure

gty:AccumulationOfAssetRetirementCostMethod


Property
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value3.033.7162.3421.4140.7352.1731.5350.8735.5823.651.6980.9458.113
Percentage of PropertyPlantAndEquipmentFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

gty:DiscountedCashFlowMethod


Property
Period End2020-12-312019-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value0.1170.00.1040.1040.00.4510.4510.1610.01.66
Percentage of PropertyPlantAndEquipmentFairValueDisclosure3.90.04.86.80.08.112.49.50.020.5

gty:EstimatedSalePriceMethod


Property
Period End2020-12-312019-12-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1.1110.2960.0580.0580.0362.5312.3381.9443.2882.9432.7922.7923.041
Percentage of PropertyPlantAndEquipmentFairValueDisclosure36.78.02.54.14.9116.5152.3222.758.980.6164.4295.437.5

us-gaap:RealEstateAccumulatedDepreciation

us-gaap:RealEstateAccumulatedDepreciation


Real
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-01-052011-12-312010-12-312009-12-31
Value187165150133120107100103116137137144136
Percentage of RealEstateAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateGrossAtCarryingValue

us-gaap:RealEstateGrossAtCarryingValue


Real
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312012-01-052011-12-312010-12-312009-12-31
Value124611131043970782783595570562615615504503
Percentage of RealEstateGrossAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateHeldforsale

us-gaap:RealEstateHeldforsale


Real
Period End2020-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value0.8720.7390.6450.8390.9170.9931.3391.3052.5672.934.3439.67214172230343125
Percentage of RealEstateHeldforsale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2001931861801751701651631581541501451411361331301261221201171131101071031031009999989795989798106114129140137148147144
Percentage of RealEstateInvestmentPropertyAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentPropertyNet

us-gaap:RealEstateInvestmentPropertyNet


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1101107110591025998993947916908885892891877830837776664659661661665670675681701487495451458459466485491432445453466476478453454360
Percentage of RealEstateInvestmentPropertyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashAndCashEquivalents


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value1791000.01979000.01979000.02014000.02009000.02008000.01883000.01942000.01942000.01938000.01850000.01442000.01179000.01114000.0821000.0820000.0825000.0771000.0671000.0215000.08000.0381000.0409000.0409000.0409000.0409000.0713000.0463000.01463000.01463000.01000000.0
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived


Sales
Period End2021-06-302021-03-312020-12-312020-09-30
Value106109113116
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceived100.0100.0100.0100.0

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears


Sales
Period End2020-12-31
Value13
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFiveYears100.0

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears


Sales
Period End2021-06-302021-03-312020-12-312020-09-30
Value13131313
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedFourYears100.0100.0100.0100.0

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths


Sales
Period End2021-06-302021-03-312020-12-312020-09-30
Value13131313
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedNextTwelveMonths100.0100.0100.0100.0

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedRemainderOfFiscalYear

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedRemainderOfFiscalYear


Sales
Period End2021-06-302021-03-312020-09-30
Value6.695103.316
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedRemainderOfFiscalYear100.0100.0100.0

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears


Sales
Period End2021-06-302021-03-312020-12-312020-09-30
Value13131313
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedThreeYears100.0100.0100.0100.0

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears


Sales
Period End2021-06-302021-03-312020-12-312020-09-30
Value13131313
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivablePaymentsToBeReceivedTwoYears100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested us-gaap:AwardType, us-gaap:PlanName

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested

us-gaap:RestrictedStockUnitsRSU, gty:OmnibusIncentiveCompensationPlan


Sharebased
Period End2020-12-31
Value23
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueNonvested100.0

us-gaap:UnsecuredDebt

us-gaap:UnsecuredDebt


Unsecured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value523523523449449449449449324324324324324224224224224224174174174174175100
Percentage of UnsecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:BalanceSheetLocation, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
('gty:PrepaidExpensesAndOtherAssets', None)
Finite Lived Intangible Assets Netus-gaap: Balance Sheet Location, us-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components