OPI


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

Table of contents



us-gaap:CommonStockValue

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostsAndExpenses

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

us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaid

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:StatementEquityComponents

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:Land

us-gaap:AmortizationOfIntangibleAssets

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssets

us-gaap:LongTermDebt
us-gaap:LongtermDebtType

us-gaap:OperatingLeaseLiability

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:AmortizationOfFinancingCosts

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquireRealEstate
us-gaap:StatementGeographical
us-gaap:StatementGeographical, us-gaap:StatementScenario, us-gaap:SubsequentEventType
us-gaap:StatementGeographical, us-gaap:SubsequentEventType

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:LongtermDebtType, us-gaap:RealEstateProperties
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:LongtermDebtType, us-gaap:RealEstateProperties

opi:GainLossonExtinguishmentofDebtNet
us-gaap:RelatedPartyTransactionsByRelatedParty
opi:LessorOperatingLeaseLeaseNotYetCommencedAnnualPercentageIncrease

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriod

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodAreaOfLeasedProperty
us-gaap:StatementGeographical
opi:RealEstateAcquisitionTerminatedAgreement
us-gaap:DisposalGroupClassification
opi:RealEstateAggregateSalesPrice
us-gaap:DisposalGroupClassification, us-gaap:SubsequentEventType
us-gaap:StatementGeographical, us-gaap:DisposalGroupClassification
us-gaap:StatementGeographical, us-gaap:DisposalGroupClassification, us-gaap:SubsequentEventType
us-gaap:StatementGeographical, us-gaap:SubsequentEventType
us-gaap:RelatedPartyTransactionsByRelatedParty
opi:RelatedPartyReimbursementExpense
us-gaap:DisposalGroupClassification
opi:SaleOfRealEstatePropertiesTransactionsCosts

opi:StockRepurchasedDuringPeriodPricePerShare
us-gaap:RelatedPartyTransactionsByRelatedParty
opi:StockRepurchasedDuringPeriodPricePerShareNet

opi:TenantReimbursementIncome
us-gaap:CreditFacility
opi:WeightedAverageAnnualInterestRate

us-gaap:AmortizationOfFinancingCostsAndDiscounts
us-gaap:StatementGeographical, us-gaap:SubsequentEventType
us-gaap:AssetAcquisitionConsiderationTransferred

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CommonStockDividendsPerShareCashPaid
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
us-gaap:ConcentrationRiskPercentage1
us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark

us-gaap:Depreciation

us-gaap:DepreciationAndAmortization

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ExtinguishmentOfDebtAmount

us-gaap:GainLossOnSaleOfProperties
us-gaap:DisposalGroupClassification
us-gaap:StatementGeographical, us-gaap:DisposalGroupClassification

us-gaap:ImpairmentOfRealEstate
us-gaap:DisposalGroupClassification
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:StatementGeographical, us-gaap:DisposalGroupClassification
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:IncentiveFeeExpense

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInDeferredLeasingFees

us-gaap:IncreaseDecreaseInDueToRelatedParties

us-gaap:IncreaseDecreaseInLeasingReceivables
us-gaap:UnusualOrInfrequentItem

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestAndOtherIncome

us-gaap:InterestPaidCapitalized

us-gaap:LeaseIncome

us-gaap:OperatingLeaseExpense

us-gaap:OtherAmortizationOfDeferredCharges

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherNoncashIncomeExpense

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsToDevelopRealEstateAssets

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromLongTermLinesOfCredit

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment

us-gaap:RealEstateTaxExpense

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent
us-gaap:StatementEquityComponents
us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionAmountsOfTransaction
us-gaap:IncomeStatementLocation, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:RepaymentsOfDebt

us-gaap:RepaymentsOfLongTermLinesOfCredit

us-gaap:RepaymentsOfSecuredDebt

us-gaap:RepaymentsOfSeniorDebt
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:RevenueFromRelatedParties
us-gaap:TitleOfIndividual, us-gaap:StatementEquityComponents
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:StraightLineRent

us-gaap:StraightLineRentAdjustments

us-gaap:UtilitiesOperatingExpense

us-gaap:VariableLeaseIncome

opi:AggregateNetBookValueOfRealEstatePropertiesCollateralized

opi:AggregatePrincipalAmountOfRealEstatePropertiesCollateralized
us-gaap:CreditFacility
us-gaap:RelatedPartyTransactionsByRelatedParty
opi:AreaOfRealEstatePropertyPercentageUponCompletionOfReDevelopment

opi:AssetAcquisitionAcquisitionRelatedCosts

opi:AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateLeaseObligation
us-gaap:StatementGeographical
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearFive
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearFour
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearNine
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearSix
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearThree
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearTwo
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageforTerminationRightExercisableNextTwelveMonths
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageforTerminationRightExercisableinYearEight
us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType
opi:ConcentrationRiskPercentageforTerminationRightExercisableinYearSeven
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
opi:DebtInstrumentFaceAmountOfAdditionalOption
us-gaap:SubsequentEventType, us-gaap:UnusualOrInfrequentItem
opi:LesseeOperatingLeaseTemporaryRentalAssistance
us-gaap:UnusualOrInfrequentItem
us-gaap:RelatedPartyTransactionsByRelatedParty
opi:LessorOperatingLeaseLeaseNotYetCommencedAnnualBaseRent
us-gaap:SubsequentEventType, us-gaap:UnusualOrInfrequentItem
opi:LessorOperatingLeasePercentageOfAnnualizedRentalIncome
us-gaap:UnusualOrInfrequentItem

opi:LiabilitiesHeldForSaleProperty

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodCommittedButUnspentTenantRelatedObligations
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAggregateBookValueOfRealEstateAssetsOrTransferredAssets
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageClosingStockPriceOnStockExchange
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageHistoricalCostOfRealEstateInvestmentsExcludingTransferredAssetsForInvestmentsUptoSpecifiedAmount
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageMarketCapitalizationExceedingSpecifiedAmount
us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionBaseManagementFeePayableAverageMarketCapitalization
us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionBaseManagementFeePayableThresholdAmountOfAverageMarketCapitalization
us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionBaseManagementFeePayableThresholdAmountOfRealEstateInvestments
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionPercentageForLimitationAndAdjustmentsOfIncentiveManagementFeePayable
us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType
opi:RelatedPartyTransactionPercentageOfBaseBusinessManagementFeePayableInCommonShares

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances
us-gaap:MajorPropertyClass
us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

srt:RealEstateFederalIncomeTaxBasis

us-gaap:AccountsReceivableNet
us-gaap:CreditFacility
us-gaap:AccumulatedAmortizationDeferredFinanceCosts

us-gaap:AreaOfRealEstateProperty

us-gaap:AssetsHeldForSaleNotPartOfDisposalGroup

us-gaap:BelowMarketLeaseAccumulatedAmortization

us-gaap:BelowMarketLeaseGross

us-gaap:CumulativeDividends

us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:SubsequentEventType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentRepurchasedFaceAmount

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DeferredCostsLeasingAccumulatedAmortization
us-gaap:StatementOperatingActivitiesSegment
us-gaap:StatementOperatingActivitiesSegment
us-gaap:DeferredCostsLeasingGross

us-gaap:DeferredCostsLeasingNet
us-gaap:CreditFacility
us-gaap:DeferredFinanceCostsGross

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredRentReceivablesNet
us-gaap:SubsequentEventType
us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent
us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
us-gaap:RelatedPartyTransactionsByRelatedParty
us-gaap:EquityMethodInvestmentAggregateCost
us-gaap:RealEstateProperties
us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:EquityMethodInvestmentOwnershipPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RealEstateProperties
us-gaap:RealEstateProperties
us-gaap:EquityMethodInvestments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RealEstateProperties
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:StatementOperatingActivitiesSegment
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive
us-gaap:StatementOperatingActivitiesSegment
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
us-gaap:StatementOperatingActivitiesSegment
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
us-gaap:StatementOperatingActivitiesSegment
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
us-gaap:StatementOperatingActivitiesSegment
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
us-gaap:StatementOperatingActivitiesSegment
us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:InvestmentBuildingAndBuildingImprovements
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LineOfCredit
us-gaap:CreditFacility
us-gaap:CreditFacility, us-gaap:SubsequentEventType
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity
us-gaap:CreditFacility, us-gaap:SubsequentEventType
us-gaap:FairValueByMeasurementBasis
us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:MortgageLoansOnRealEstate

us-gaap:OffMarketLeaseUnfavorable

us-gaap:OtherLiabilities

us-gaap:RealEstateAccumulatedDepreciation

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfLand

us-gaap:RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfLand

us-gaap:RealEstateGrossAtCarryingValue
us-gaap:DisposalGroupClassification
us-gaap:RealEstateHeldforsale

us-gaap:RealEstateInvestmentPropertyAccumulatedDepreciation

us-gaap:RealEstateInvestmentPropertyAtCost
us-gaap:StatementOperatingActivitiesSegment

us-gaap:RealEstateInvestmentPropertyNet

us-gaap:RealEstateInvestmentsJointVentures

us-gaap:RestrictedCash

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:SecuredDebt
us-gaap:FairValueByMeasurementBasis

us-gaap:SeniorNotes
us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

Plots across concepts


Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Cash And Cash Equivalents At Carrying Value
NonCurrent Assets
Operating Lease Right Of Use Asset
Liabilities
Operating Lease Liability
Noncurrent Liabilities
Long Term Debt
Stockholders Equity
Common Stock Value
Per Share
Earnings Per Share Diluted
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInFinancingActivities
Payments For Repurchase Of Common Stock
Shares
Weighted Average Number Of Share Outstanding Basic And Diluted
DividendsAndRepurchase
Payments For Repurchase Of Common Stock

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:CommonStockValue ▂▂▂▂▂▂▂▂▂▂▂█████▅▅▅▅▅▅▅▅▅▅▅▅▃▃▃▃▃▃▃▂▂▂▂▂▁▁0.4830.4830.4830.4830.4820.4820.4820.4820.4810.4810.4810.9920.9920.9910.9910.9910.7120.7120.7120.7120.7110.7110.7110.7110.7110.7040.7030.7030.5480.5470.5470.5470.5470.5470.5470.4710.4710.4710.4710.4710.4050.405
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▁█48.16548.196NANA48.10648.095NA48.07348.04948.046NA99.07199.06499.049NA96.95871.11971.094NA71.08471.06171.031NA71.02170.48570.266NA65.56854.74354.725NANANANANANANANANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁48.16548.161NANA48.10648.095NA48.07348.04948.031NA99.07199.05199.041NA96.88371.08871.079NA71.05471.03871.031NA71.00470.48570.266NA65.56854.74354.725NA54.68454.66954.645NA47.10847.09847.052NA45.32240.506NA
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted NANANA48.13248.106NANA48.07348.049NANANANANANANANANANANANA71.031NANANA70.266NANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic ▁█-1.380.78NANA0.030.23NANANANANANANANANANANANANANANANANANA-2.71NANA0.190.270.280.230.040.280.450.250.250.250.280.280.260.270.24
us-gaap:EarningsPerShareDiluted ▁█-1.380.78NANA0.030.23NANANANANANANANANANANANANANANANANANA-2.71NANANA0.27NANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasicAndDiluted NA0.78-0.03-0.080.030.231.35-0.08-1.350.71-2.310.00.30.06-0.180.110.160.10.170.160.240.24-0.030.24-2.71-0.470.20.190.270.28NANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:ComprehensiveIncomeNetOfTax ▄▇▆▆▆▇█▆▄▇▅▆▇▆▆▇▇▇▇▇▇▇▆▇▁▅▇▇▇▇▇▆▇▇▇▇▇▇▇▇▇-66.69737.86-1.664-3.7121.47510.77964.919-3.905-64.97233.987-57.854-0.32329.7296.524-4.54415.61910.31324.17214.89523.31426.65634.802-17.07716.556-191.032-33.31214.10512.57714.6315.20912.7411.9815.13124.71813.18211.79111.95313.05813.25211.57810.971NA
us-gaap:CostsAndExpenses █▆▆▆▆▆▇▇▇▇▄▅▄▅▅▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▂▁▁▁162.658131.044118.986122.283118.143119.751135.959150.168140.444147.94176.683110.40586.786102.417104.50953.41453.04951.24248.90649.29546.56246.7445.74946.35545.0645.41646.14247.7343.04842.58241.38540.31438.03337.04738.87937.88934.26133.38135.63631.08427.92524.632
us-gaap:GainsLossesOnExtinguishmentOfDebt -11.794NA0.00.0-0.557-3.2820.0-0.284-0.071-0.414-0.7090.00.00.00.0-1.7150.00.00.00.00.00.1040.00.034NANA-0.766-0.541NANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType opi:A3.60SeniorUnsecuredNotesDue2020,us-gaap:SeniorNotesNANA0.00.00.00.061NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType opi:A4.0MortgageNotesPayableDue2030,us-gaap:MortgagesNANA0.00.0NA2.713NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType opi:A5.9MortgageNotesPayableDue2021,us-gaap:MortgagesNANA0.00.00.00.508NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType opi:SeniorUnsecuredNotes5875PercentDue2046,us-gaap:SeniorNotes-8.581NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▆▆▅▅▅▅▅▅▅▅▁█▄▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄12.9711.2727.0717.0597.2047.1097.2717.998.7448.723-11.51622.3834.4499.6066.5333.2665.0863.9623.5473.8164.0083.5263.3953.7143.7134.0044.2724.3294.1113.0973.362.9413.2993.2492.963.6372.7193.0393.2432.7462.5662.146
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▄▇▆▆▆▇█▆▅▇▆▆▆▆▆▆▆▆▆▆▆▆▆▆▁▆▆▆▇▇▇▇▇▇-66.23838.691-1.129-3.5721.79411.15565.984-3.587-64.76234.737-21.066-9.8088.777-3.115-18.7221.0653.2664.8384.7472.9987.5747.617-4.7356.615-197.0527.9538.2397.01314.2312.76112.4611.92114.79416.133NANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▁▇▄▂▅▃▆▄▁█▂▃▃▃▃▃▃▃▃▃▃▃▃▂▃▃▂▃▄▃▃▂▃▃▃▃▃▃▄▂▃▄-0.1210.4350.157-0.0540.2350.0390.2690.156-0.130.483-0.0070.0090.0830.0320.0360.0220.0250.0180.0380.0130.0350.0150.037-0.0130.0320.03-0.0130.0070.1010.0220.083-0.0360.0430.0430.040.030.0440.0450.109-0.0080.0560.09
us-gaap:IncomeTaxesPaid NANA0.281.0970.00.00.00.0340.450.0070.0240.0060.0380.00.0170.0180.0820.00.0170.0180.0320.0440.00.065-0.0530.1310.00.0390.0440.043-0.0040.0450.0440.084-0.050.0810.0620.0240.029-0.0080.020.008
us-gaap:InterestExpense ▆▆▆▆▆▆▇▇██▅▅▅▅▅▄▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁29.00128.79828.84227.09725.20527.15930.03232.36735.34837.13320.42123.37423.30422.76621.80716.05513.96313.58112.77412.60810.3149.3649.1149.1379.4559.3029.5188.8455.1584.5274.4434.1764.0654.1474.2434.534.0964.0233.2823.1623.0762.169
us-gaap:InterestPaidNet ▄▆▄▆▄▇▄█▄█▁▅▄▅17.58636.13616.96729.30516.09637.71517.50945.58619.09549.545-7.46328.69316.22527.733NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▁▇▄▄▅▅█▄▁▆▁▅▆▅▄▅▅▅-66.69737.86-1.664-3.7971.29910.8465.029-3.939-64.77434.019-57.695-0.44929.6956.565-17.99110.98911.6777.415NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-66.69737.86NANA1.29910.84NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic NA37.737NA-3.7971.29910.8465.029-3.939-64.77434.019-57.695-0.44929.6026.287-18.26610.98911.6777.41512.06511.57816.81317.387-2.33916.911-191.163-33.3714.11412.62214.60815.1912.7241.96615.20424.72613.19111.75611.95413.05913.26311.56310.9326.54
 us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementEquityComponents us-gaap:RetainedEarningsNANANA-3.7971.29910.84NA-3.939-64.77434.019NA-0.44929.6026.287NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:Assets ▆▆▆▆▆▆▆▇▇▇█▅▅▅▅▅▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁4211.2133952.5793946.4363973.0453977.6634028.7054193.1364360.2494804.3224927.1985238.5833484.4253507.7693655.6243703.5653536.9672365.1092377.052385.0662265.072251.212259.3952174.5362227.0382237.5752414.9272427.6152429.7181751.6051629.481632.4521553.0791527.2041539.971562.1341524.7871382.8241363.2471368.5751266.6681162.734951.288
us-gaap:Liabilities ▆▆▆▆▆▆▆▆▇▇█▅▅▆▆▅▄▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁2682.6632331.5812337.0442336.3732311.2332338.3312487.3822693.6363107.8363140.1943459.6152245.0642226.1192340.772353.0262159.441456.431448.481450.0621314.331293.9981298.4981217.8851213.5941210.3321180.7251130.1661116.386778.382647.948642.777552.617506.085510.783534.683653.794504.522477.342476.907368.479417.469193.891
us-gaap:LiabilitiesAndStockholdersEquity ▆▆▆▆▆▆▆▇▇▇█▅▅▅▅▅▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▂▁▁4211.2133952.5793946.4363973.0453977.6634028.7054193.1364360.2494804.3224927.1985238.5833484.4253507.7693655.6243703.5653536.9672365.1092377.052385.0662265.072251.212259.3952174.5362227.0382237.5752414.9272427.6152429.7181751.6051629.481632.4521553.0791527.2041539.971562.1341524.7871382.8241363.2471368.5751266.6681162.734951.288
us-gaap:StockholdersEquity ▆▇▇▇▇▇▇▇▇██▄▄▄▅▅▁▁▁▂▂▂▂▂▂▄▄▄▂▂▂▂▂▂▂▁▁▁▁▁1528.551620.9981609.3921636.6721666.431690.3741705.7541666.6131696.4861787.0041778.9681239.3611281.651294.3581330.0431377.527908.679928.57935.004950.74957.212960.897956.6511013.4441027.2431234.2021297.4491313.332973.223981.532989.6751000.4621021.1191029.1871027.451870.993878.302885.905891.668898.189NA757.397
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:CashAndCashEquivalentsAtCarryingValue ▁▃▂▂▁▁▂▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁18.667184.46242.04545.03524.48529.65793.74429.00221.10220.15335.3499.64418.69517.3816.569551.70712.90712.80829.94113.7499.02115.6988.78511.3067.0519.53713.7914.9285.0352.9797.6632.6973.1193.5865.2553.1691.3949.2753.2725.7241.0812.437
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▁▃▂▂▁▁▂▁▁▁▁▁▁▁▁█▁▁▁20.081201.47556.85557.63930.10134.006100.69633.03324.68524.61738.94311.99821.14322.14619.68552.21613.25113.51130.471NANANA9.807NANANANANANANANANANANANANANANANANANANA
us-gaap:Land ▇▇▇▇▇▇▇▇███▄▅▅▅▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁865.218824.622830.884840.931843.418843.418840.55854.083875.019918.992924.164448.714587.173623.61627.108269.332269.41269.41267.855259.416257.746257.716253.058253.058253.058254.008254.008254.008258.33246.649243.686239.222243.584243.584244.655241.294228.824224.674224.674213.994195.764143.774
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:AmortizationOfIntangibleAssets ▅▆▆▆▇▆▆███▃▄▄▄▅▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▁▁32.72641.57540.78340.68343.26942.45740.8751.64851.62353.83716.94125.19625.44826.7930.5828.3838.5378.6727.0557.1067.137.7126.8537.1547.2777.347.4197.5926.6826.025.8335.3625.2145.1995.1555.0784.6364.6384.9553.5122.4781.912
us-gaap:FiniteLivedIntangibleAssetsNet ▅▄▄▅▅▅▆▆▇██▂▃▃▃▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁570.449505.582548.943604.233645.589689.512732.382808.817924.5941000.961056.558215.938297.696323.71351.87299.953108.927118.065124.848105.499113.23123.3118.267125.898133.837141.92150.08158.375163.831139.33142.266131.683132.233138.273144.484131.159110.805112.178117.596103.90180.07560.097
us-gaap:OperatingLeaseRightOfUseAsset NANA0.1680.671.1671.662.149NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:LongTermDebt NANA2202.971NANANA2340.453NANANA3254.89NANANA2245.092NANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:LongtermDebtType us-gaap:Mortgages▁█98.903170.198NA171.475211.796245.266NA327.262328.293NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:StockholdersEquity ▆▇▇▇▇▇▇▇▇██▄▄▄▅▅▁▁▁▂▂▂▂▂▂▄▄▄▂▂▂▂▂▂▂▁▁▁▁▁1528.551620.9981609.3921636.6721666.431690.3741705.7541666.6131696.4861787.0041778.9681239.3611281.651294.3581330.0431377.527908.679928.57935.004950.74957.212960.897956.6511013.4441027.2431234.2021297.4491313.332973.223981.532989.6751000.4621021.1191029.1871027.451870.993878.302885.905891.668898.189NA757.397
us-gaap:CommonStockValue ▂▂▂▂▂▂▂▂▂▂▂█████▅▅▅▅▅▅▅▅▅▅▅▅▃▃▃▃▃▃▃▂▂▂▂▂▁▁0.4830.4830.4830.4830.4820.4820.4820.4820.4810.4810.4810.9920.9920.9910.9910.9910.7120.7120.7120.7120.7110.7110.7110.7110.7110.7040.7030.7030.5480.5470.5470.5470.5470.5470.5470.4710.4710.4710.4710.4710.4050.405
us-gaap:AdditionalPaidInCapitalCommonStock ███████████▆▆▆▆▆▄▄▄▄▄▄▄▄▄▄▄▄▂▂▂▂▂▂▂▂▂▂▂▂▁▁2616.452615.6262615.3052614.3462613.8682612.7772612.4252612.0622611.572610.6662609.8011969.1681968.4931968.2051968.2171968.2491473.9361473.5331473.5331473.5571472.7541472.511472.4821472.481472.271457.9471457.6311457.3731106.4521105.8571105.6791105.6761104.8031104.4971103.982937.285936.603936.379935.438935.463777.169776.913
us-gaap:RetainedEarningsAccumulatedDeficit ▅▇▆▆▆▆▆▄▄▆▅▇▇▆▄▄▄▃▃▃▃▂▁▂▁▇██▇▇▆▆▆▅▅▄▄▃▃▃▂▂155.058221.755183.895185.559189.356188.057177.217112.188116.127180.901146.882204.579205.028174.585108.144126.41115.42103.74496.32984.26472.68655.87338.48640.82523.914215.077248.447234.333221.711207.103191.913179.189177.223162.019137.293124.102112.346100.39287.33374.08562.52241.336
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▅▆▅▆▃▆▃█▁▂▂▅▃▃▂▃▂▂▁▃▂▂▂▃▂▃▂▂▂▂▂▂▂▁▂▂▂59.43457.94267.5354.90873.58937.60167.19140.34889.04818.74224.75126.66858.2335.26739.32125.2143.225.31632.58419.65340.80931.21226.30426.19834.60728.24838.68431.16129.81531.06526.0523.85228.84329.64617.84829.89223.2629.308NANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▄▃▃▃▃▄▄▃▄▅▃▄▃▂▁▃▃▃▃▃▃▃▃▃▃█▁▃▃▃▃▃▃▃▃▃▃-514.363113.896-41.091-22.83-1.16142.095238.051370.88818.549250.331611.765-7.034122.90611.019-523.895-643.746-7.108-11.464-120.309-8.572-5.41-80.866-0.8091.075-10.244-56.6241490.608-688.605-48.136-5.108-85.054-44.285-2.83514.667-41.017-147.889-37.924-5.637NANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▃▃▃▃▂▂▃▂▁▃▃▃▃█▃▃▄▃▃▄▃▃▃▄▃▆▃▃▄▃▃▃▄▄▃▃273.535-27.218-27.223-4.54-76.333-146.386-237.579-402.888-107.529-283.399-609.571-28.779-182.139-43.82-50.5641157.336-35.993-30.985103.917-6.353-42.07656.567-28.016-23.018-26.84924.122-22.911657.33720.377-30.64163.9720.011-26.475-45.98225.255119.7726.783-17.668NANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▁█▅▅▅▃▆▅▅▅▅-181.394144.62-0.78427.538-3.905-66.6967.6638.3480.068-14.32626.945NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:AmortizationOfFinancingCosts █▁2.4922.432NA2.4772.4022.283NA2.562.8632.841NA0.8930.8920.9650.8150.990.8080.8070.8080.8050.7470.4710.3560.360.3280.3320.3840.3730.2230.330.3380.3390.3320.3310.3340.3390.3350.324-0.2090.4180.4180.492
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▅▆▅▆▃▆▃█▁▂▂▅▃▃▂▃▂▂▁▃▂▂▂▃▂▃▂▂▂▂▂▂▂▁▂▂▂59.43457.94267.5354.90873.58937.60167.19140.34889.04818.74224.75126.66858.2335.26739.32125.2143.225.31632.58419.65340.80931.21226.30426.19834.60728.24838.68431.16129.81531.06526.0523.85228.84329.64617.84829.89223.2629.308NANANANA
us-gaap:NetIncomeLoss ▁▇▄▄▅▅█▄▁▆▁▅▆▅▄▅▅▅-66.69737.86-1.664-3.7971.29910.8465.029-3.939-64.77434.019-57.695-0.44929.6956.565-17.99110.98911.6777.415NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁█-66.69737.86NANA1.29910.84NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▄▃▃▃▃▄▄▃▄▅▃▄▃▂▁▃▃▃▃▃▃▃▃▃▃█▁▃▃▃▃▃▃▃▃▃▃-514.363113.896-41.091-22.83-1.16142.095238.051370.88818.549250.331611.765-7.034122.90611.019-523.895-643.746-7.108-11.464-120.309-8.572-5.41-80.866-0.8091.075-10.244-56.6241490.608-688.605-48.136-5.108-85.054-44.285-2.83514.667-41.017-147.889-37.924-5.637NANANANA
us-gaap:PaymentsToAcquireRealEstate NANA35.3510.00.011.864NANA0.00.0NA0.00.00.0521.828653.5540.00712.641NANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:StatementGeographical opi:BostonMANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:StatementGeographical,us-gaap:StatementScenario,us-gaap:SubsequentEventType opi:BrookhavenGA,srt:ScenarioForecast,us-gaap:SubsequentEventNANA15.25NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:StatementGeographical,us-gaap:SubsequentEventType opi:BostonMA,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:PaymentsToAcquireRealEstate us-gaap:StatementGeographical,us-gaap:SubsequentEventType opi:DenverCO,us-gaap:SubsequentEventNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
us-gaap:NetCashProvidedByUsedInFinancingActivities ▄▃▃▃▃▃▂▂▃▂▁▃▃▃▃█▃▃▄▃▃▄▃▃▃▄▃▆▃▃▄▃▃▃▄▄▃▃273.535-27.218-27.223-4.54-76.333-146.386-237.579-402.888-107.529-283.399-609.571-28.779-182.139-43.82-50.5641157.336-35.993-30.985103.917-6.353-42.07656.567-28.016-23.018-26.84924.122-22.911657.33720.377-30.64163.9720.011-26.475-45.98225.255119.7726.783-17.668NANANANA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType opi:SeniorUnsecuredNotes6.375PercentDueIn2050,us-gaap:SeniorNotesNANANANA156.186NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType opi:SeniorUnsecuredNotesDueIn2025,us-gaap:SeniorNotesNANANA251.214251.269NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType opi:TwoPointSixtyFivePercentSeniorUnsecuredNotesDue2026,us-gaap:SeniorNotesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock ▄▄▄▄▄▄▄▄▄▄██████▅▅▅▅▅▅▅▅▅▅▅▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁26.57526.57526.57526.52526.5126.51126.51226.46126.4526.44542.65942.64142.63442.63242.63341.36430.60630.60630.60730.5930.58530.58430.58630.56630.25630.25230.24723.54423.53523.5323.53123.5123.50523.49723.49719.78219.77819.76219.76217.01417.0116.605
us-gaap:PaymentsForRepurchaseOfCommonStock NANA0.00.3770.030.0270.0140.3960.0630.00.00.2140.0070.0110.0090.250.0050.00.0250.312NANA-0.002NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType opi:A22MortgageNotesPayablesDue2020,us-gaap:MortgagesNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType,us-gaap:RealEstateProperties us-gaap:Mortgages,us-gaap:UnconsolidatedProperties████▁▁▁▁3.9300000000000005e-063.9300000000000005e-063.9300000000000005e-063.9300000000000005e-063.93e-083.93e-083.93e-083.93e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:LongtermDebtType,us-gaap:RealEstateProperties opi:A1750HStreetNW,us-gaap:Mortgages,us-gaap:UnconsolidatedProperties████▁▁▁▁3.69e-063.69e-063.69e-063.69e-063.69e-083.69e-083.69e-083.69e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:LongtermDebtType,us-gaap:RealEstateProperties opi:ProsperityMetroPlaza,us-gaap:Mortgages,us-gaap:UnconsolidatedProperties████▁▁▁▁4.09e-064.09e-064.09e-064.09e-064.0899999999999996e-084.0899999999999996e-084.0899999999999996e-084.0899999999999996e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

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
Value483000.0483000.0483000.0483000.0482000.0482000.0482000.0482000.0481000.0481000.0481000.0992000.0992000.0991000.0991000.0991000.0712000.0712000.0712000.0712000.0711000.0711000.0711000.0711000.0711000.0704000.0703000.0703000.0548000.0547000.0547000.0547000.0547000.0547000.0547000.0471000.0471000.0471000.0471000.0471000.0405000.0405000.0
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 Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-31
Value48484848484848999999967171717171717070655454
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value484848484848489999999671717171717170706554545454544747474540403631
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2020-09-302020-06-302019-09-302019-06-302016-03-312015-03-31
Value484848487170
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-06-302020-03-312015-06-302014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value-1.380.780.030.23-2.710.190.270.280.230.040.280.450.250.250.250.280.280.260.270.250.240.180.250.24
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-06-302020-03-312015-06-302014-06-30
Value-1.380.780.030.23-2.710.27
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0.78-0.03-0.080.030.231.35-0.08-1.350.71-2.3100.30.06-0.180.110.160.10.170.160.240.24-0.030.24-2.71-0.470.20.190.270.28
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-66.69737-1.664-3.7121.4751064-3.905-64.97233-57.854-0.323296.524-4.54415102414232634-17.07716-191.032-33.31214121415121.9815241311111313111010
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.040.5-2.3-36.919.4-55.8-0.327.56.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1621311181221181191351501401477611086102104535351484946464546454546474342414038373837343335312726242216
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.084.989.779.884.674.0104.180.394.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312014-09-30
Value-11794000.000-557000.0-3282000.00-284000.0-71000.0-414000.0-709000.00000-1715000.000000104000.0034000.0-766000.0-541000.0
Percentage of GainsLossesOnExtinguishmentOfDebt100.00.00.0100.0100.00.0100.0100.0100.0100.00.00.00.00.0100.00.00.00.00.00.0100.00.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0-0.2-0.0-0.2-0.70.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

opi:A3.60SeniorUnsecuredNotesDue2020, us-gaap:SeniorNotes


Gains
Period End2020-12-312020-09-302020-06-302020-03-31
Value00061000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.0-0.0-1.9
Percentage of Revenues0.00.00.00.0
Percentage of Revenues opi:A3.60SeniorUnsecuredNotesDue2020 us-gaap:SeniorNotes0.00.00.00.0

opi:A4.0MortgageNotesPayableDue2030, us-gaap:Mortgages


Gains
Period End2020-12-312020-09-302020-03-31
Value002713000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.0-82.7
Percentage of Revenues0.00.00.0
Percentage of Revenues opi:A4.0MortgageNotesPayableDue2030 us-gaap:Mortgages0.00.00.0

opi:A5.9MortgageNotesPayableDue2021, us-gaap:Mortgages


Gains
Period End2020-12-312020-09-302020-06-302020-03-31
Value000508000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.0-0.0-15.5
Percentage of Revenues0.00.00.00.0
Percentage of Revenues opi:A5.9MortgageNotesPayableDue2021 us-gaap:Mortgages0.00.00.00.0

opi:SeniorUnsecuredNotes5875PercentDue2046, us-gaap:SeniorNotes


Gains
Period End2021-06-30
Value-8581000.0
Percentage of GainsLossesOnExtinguishmentOfDebt72.8
Percentage of Revenues0.0
Percentage of Revenues opi:SeniorUnsecuredNotes5875PercentDue2046 us-gaap:SeniorNotes0.0

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
Value12117.0717.0597.2047.1097.2717.998.7448.723-11.516224.4499.6066.5333.2665.0863.9623.5473.8164.0083.5263.3953.7143.7134.0044.2724.3294.1113.0973.362.9413.2993.2492.963.6372.7193.0393.2432.7462.5662.3432.1461.8331.623
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 Revenues0.00.00.00.00.00.04.54.85.05.0-11.121.14.18.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-66.23838-1.129-3.5721.7941165-3.587-64.76234-21.066-9.8088.777-3.115-18.7221.0653.2664.8384.7472.9987.5747.617-4.7356.615-197.0527.9538.2397.013141212111416
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.041.2-2.1-36.819.9-20.3-9.28.1-2.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-121000.0435000.0157000.0-54000.0235000.039000.0269000.0156000.0-130000.0483000.0-7000.09000.083000.032000.036000.022000.025000.018000.038000.013000.035000.015000.037000.0-13000.032000.030000.0-13000.07000.0101000.022000.083000.0-36000.043000.043000.040000.030000.044000.045000.0109000.0-8000.056000.046000.090000.035000.025000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.20.1-0.10.3-0.00.00.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid

us-gaap:IncomeTaxesPaid

us-gaap:IncomeTaxesPaid


Income
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value280000.01097000.000034000.0450000.07000.024000.06000.038000.0017000.018000.082000.0017000.018000.032000.044000.0065000.0-53000.0131000.0039000.044000.043000.0-4000.045000.044000.084000.0-50000.081000.062000.024000.029000.0-8000.020000.031000.08000.058000.0
Percentage of IncomeTaxesPaid100.0100.00.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest 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
Value2928282725273032353720232322211613131212109.3649.1149.1379.4559.3029.5188.8455.1584.5274.4434.1764.0654.1474.2434.534.0964.0233.2823.1623.0762.5372.1691.9731.678
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 Revenues0.00.00.00.00.00.018.719.320.121.219.722.021.620.90.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value17361629163717451949-7.463281627
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.010.927.210.828.3-7.227.015.025.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-66.69737-1.664-3.7971.2991065-3.939-64.77434-57.695-0.449296.565-17.99110117.415
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.040.6-2.4-36.819.5-55.7-0.427.56.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value-66.697371.29910
Percentage of NetIncomeLoss100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic


Net
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-31
Value37-3.7971.2991065-3.939-64.77434-57.695-0.449296.287-18.26610117.41512111617-2.33916-191.163-33.3714121415121.966152413111113131110106.546.6697.7356.851
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.040.6-2.4-36.819.5-55.7-0.427.45.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value-3.7971.29910-3.939-64.77434-0.449296.287
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.0-2.4-36.819.5-0.427.45.8
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value42113952394639733977402841934360480449275238348435073655370335362365237723852265225122592174222722372414242724291751162916321553152715391562152413821363136812661162951
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
Value2682233123372336231123382487269331073140345922452226234023532159145614481450131412931298121712131210118011301116778647642552506510534653504477476368417193
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 Assets63.759.059.258.858.158.059.361.864.763.766.064.463.564.063.561.161.660.960.858.057.557.556.054.554.148.946.645.944.439.839.435.633.133.234.242.936.535.034.829.135.920.4

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
Value42113952394639733977402841934360480449275238348435073655370335362365237723852265225122592174222722372414242724291751162916321553152715391562152413821363136812661162951
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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value1528162016091636166616901705166616961787177812391281129413301377908928935950957960956101310271234129713139739819891000102110291027870878885891898757352413
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.341.040.841.241.942.040.738.235.336.334.035.636.535.435.938.938.439.139.242.042.542.544.045.545.951.153.454.155.660.260.664.466.966.865.857.163.565.065.270.979.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

opi:CumulativeCommonDistributions


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-1243.441-1216.866-1190.291-1163.716-1137.191-1110.681-1084.17-1057.658-1031.197-1004.747-978.302-935.643-893.002-850.368-807.736-662.527
Percentage of StockholdersEquity-81.3-75.1-74.0-71.1-68.2-65.7-63.6-63.5-60.8-56.2-55.0-75.5-69.7-65.7-60.7-70.9
Percentage of Assets-29.5-30.8-30.2-29.3-28.6-27.6-25.9-24.3-21.5-20.4-18.7-26.9-25.5-23.3-21.8-27.8
Percentage of Assets opi:CumulativeCommonDistributions0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value26162615261526142613261226122612261126102609196919691968196814731472145711051103935776357
Percentage of StockholdersEquity171.2161.4162.5159.7156.9154.6153.2156.7153.9146.1146.7158.9153.6152.1148.0157.6153.9112.3111.7107.4104.9102.6101.6
Percentage of Assets62.166.266.365.865.764.962.359.954.453.049.856.556.153.953.161.867.760.067.770.768.481.70.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value0.4830.4830.4830.4830.4820.4820.4820.4820.4810.4810.4810.2480.2480.2480.9910.7120.7110.7030.5470.5470.4710.4050.215
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1552211831851891881771121161801462042051751089638248191137874113
Percentage of StockholdersEquity10.113.711.411.311.411.110.46.76.810.18.316.516.013.68.110.34.019.119.413.49.85.53.8
Percentage of Assets3.75.64.74.74.84.74.22.62.43.72.85.95.84.82.94.01.810.211.88.86.44.30.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302009-12-312008-12-31
Value181844245242993292120359.644181716551121229139.021158.785117.0519.537134.9285.0352.9797.6632.6973.1193.5865.2553.1691.3949.2753.2725.7241.0810.9062.4372.3141.0231.4780.097
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.44.71.11.10.60.72.20.70.40.40.70.30.50.50.415.60.50.51.30.60.40.70.40.50.30.40.60.20.30.20.50.20.20.20.30.20.10.70.20.50.10.00.30.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value202015657303410033242438112122195521313309.807
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.55.11.41.50.80.82.40.80.50.50.70.30.60.60.515.60.60.61.30.5

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
Value865824830840843843840854875918924448587623627269269269267259257257253253253254254254258246243239243243244241228224224213195143
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 Assets20.520.921.121.221.220.920.019.618.218.717.612.916.717.116.97.611.411.311.211.511.411.411.611.411.310.510.510.514.715.114.915.415.915.815.715.816.516.516.416.916.815.1

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3241404043424051515316252526308.3838.5378.6727.0557.1067.137.7126.8537.1547.2777.347.4197.5926.6826.025.8335.3625.2145.1995.1555.0784.6364.6384.9553.5122.4782.1261.9121.335
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value57050554860464568973280892410001056215297323351991081181241051131231181251331411501581631391421311321381441311101121171038060
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets13.512.813.915.216.217.117.518.519.220.320.26.28.58.99.52.84.65.05.24.75.05.55.45.76.05.96.26.59.48.68.78.58.79.09.28.68.08.28.68.26.96.3

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value15324118
Percentage of FiniteLivedIntangibleAssetsNet2.94.43.95.4
Percentage of Assets0.40.80.80.5
Percentage of Assets us-gaap:AboveMarketLeases0.00.00.00.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312012-12-312011-12-312010-12-31
Value533700101533314810559
Percentage of FiniteLivedIntangibleAssetsNet97.195.696.194.6102.889.498.3
Percentage of Assets13.516.719.49.09.57.76.2
Percentage of Assets us-gaap:LeasesAcquiredInPlace0.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value168000.0670000.01167000.01660000.02149000.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.1

Other Assets

us-gaap:OtherAssets

us-gaap:OtherAssets


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value6.317121216102020331592021781361131069689827768695244295654101213142325189.1949.3211011181110241816
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.20.30.30.40.30.50.50.83.34.13.43.93.22.92.62.53.53.32.93.12.32.01.42.52.50.40.50.50.81.41.51.20.60.60.70.81.30.90.82.01.61.7

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312019-12-312018-12-312017-12-31
Value2202234032542245
Percentage of LongTermDebt100.0100.0100.0100.0
Percentage of Assets55.855.862.160.6

us-gaap:LongTermDebt us-gaap:LongtermDebtType

us-gaap:Mortgages


Long
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value98170171211245327328
Percentage of LongTermDebt0.00.00.00.00.00.00.0
Percentage of Assets2.34.34.35.36.17.56.8
Percentage of Assets us-gaap:Mortgages0.00.00.00.00.00.00.0

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-31
Value174000.0689000.01190000.01687000.02179000.0
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.1

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312009-12-312008-12-31
Value1528162016091636166616901705166616961787177812391281129413301377908928935950957960956101310271234129713139739819891000102110291027870878885891898757352413
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets36.341.040.841.241.942.040.738.235.336.334.035.636.535.435.938.938.439.139.242.042.542.544.045.545.951.153.454.155.660.260.664.466.966.865.857.163.565.065.270.979.60.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

opi:CumulativeCommonDistributions


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-1243.441-1216.866-1190.291-1163.716-1137.191-1110.681-1084.17-1057.658-1031.197-1004.747-978.302-935.643-893.002-850.368-807.736-662.527
Percentage of StockholdersEquity-81.3-75.1-74.0-71.1-68.2-65.7-63.6-63.5-60.8-56.2-55.0-75.5-69.7-65.7-60.7-70.9
Percentage of Assets-29.5-30.8-30.2-29.3-28.6-27.6-25.9-24.3-21.5-20.4-18.7-26.9-25.5-23.3-21.8-27.8
Percentage of Assets opi:CumulativeCommonDistributions0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value26162615261526142613261226122612261126102609196919691968196814731472145711051103935776357
Percentage of StockholdersEquity171.2161.4162.5159.7156.9154.6153.2156.7153.9146.1146.7158.9153.6152.1148.0157.6153.9112.3111.7107.4104.9102.6101.6
Percentage of Assets62.166.266.365.865.764.962.359.954.453.049.856.556.153.953.161.867.760.067.770.768.481.70.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value0.4830.4830.4830.4830.4820.4820.4820.4820.4810.4810.4810.2480.2480.2480.9910.7120.7110.7030.5470.5470.4710.4050.215
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1552211831851891881771121161801462042051751089638248191137874113
Percentage of StockholdersEquity10.113.711.411.311.411.110.46.76.810.18.316.516.013.68.110.34.019.119.413.49.85.53.8
Percentage of Assets3.75.64.74.74.84.74.22.62.43.72.85.95.84.82.94.01.810.211.88.86.44.30.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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
Value483000.0483000.0483000.0483000.0482000.0482000.0482000.0482000.0481000.0481000.0481000.0992000.0992000.0991000.0991000.0991000.0712000.0712000.0712000.0712000.0711000.0711000.0711000.0711000.0711000.0704000.0703000.0703000.0548000.0547000.0547000.0547000.0547000.0547000.0547000.0471000.0471000.0471000.0471000.0471000.0405000.0405000.0
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 Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value26162615261526142613261226122612261126102609196919681968196819681473147314731473147214721472147214721457145714571106110511051105110411041103937936936935935777776
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 Assets62.166.266.365.865.764.962.359.954.453.049.856.556.153.853.155.662.362.061.865.165.465.267.766.165.860.460.060.063.267.967.771.272.371.770.761.567.768.768.473.966.881.7

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1552211831851891881771121161801462042051741081261151039684725538402321524823422120719117917716213712411210087746241
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.75.64.74.74.84.74.22.62.43.72.85.95.84.82.93.64.94.44.03.73.22.51.81.81.18.910.29.612.712.711.811.511.610.58.88.18.17.46.45.85.44.3

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value5957675473376740891824265835392543253219403126263428383129312623282917292329
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.041.924.150.610.723.925.153.932.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-514.363113-41.091-22.83-1.1614223837018250611-7.03412211-523.895-643.746-7.108-11.464-120.309-8.572-5.41-80.866-0.8091.075-10.244-56.6241490-688.605-48.136-5.108-85.054-44.285-2.83514-41.017-147.889-37.924-5.637
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0148.6221.510.5143.2590.2-6.6113.710.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value273-27.218-27.223-4.54-76.333-146.386-237.579-402.888-107.529-283.399-609.571-28.779-182.139-43.82-50.5641157-35.993-30.985103-6.353-42.07656-28.016-23.018-26.84924-22.91165720-30.6416320-26.475-45.982251196.783-17.668
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0-148.3-240.7-61.1-162.1-588.1-27.1-168.5-40.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value-181.394144-0.78427-3.905-66.69678.3480.068-14.32626
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.042.25.00.0-8.226.0

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2492000.02432000.02477000.02402000.02283000.02560000.02863000.02841000.0893000.0892000.0965000.0815000.0990000.0808000.0807000.0808000.0805000.0747000.0471000.0356000.0360000.0328000.0332000.0384000.0373000.0223000.0330000.0338000.0339000.0332000.0331000.0334000.0339000.0335000.0324000.0-209000.0418000.0418000.0259000.0492000.0635000.0624000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value5957675473376740891824265835392543253219403126263428383129312623282917292329
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.041.924.150.610.723.925.153.932.40.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-66.69737-1.664-3.7971.2991065-3.939-64.77434-57.695-0.449296.565-17.99110117.415
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.040.6-2.4-36.819.5-55.7-0.427.56.00.00.00.00.0

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-06-302020-03-31
Value-66.697371.29910
Percentage of NetIncomeLoss100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-514.363113-41.091-22.83-1.1614223837018250611-7.03412211-523.895-643.746-7.108-11.464-120.309-8.572-5.41-80.866-0.8091.075-10.244-56.6241490-688.605-48.136-5.108-85.054-44.285-2.83514-41.017-147.889-37.924-5.637
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0148.6221.510.5143.2590.2-6.6113.710.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Real Estate

us-gaap:PaymentsToAcquireRealEstate

us-gaap:PaymentsToAcquireRealEstate


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value350.00.0110.00.00.00.00.05216530.00712
Percentage of PaymentsToAcquireRealEstate100.00.00.0100.00.00.00.00.00.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireRealEstate us-gaap:StatementGeographical

opi:BostonMA


Payments
Period End2020-11-302020-02-292019-11-30
Value26112.9
Percentage of PaymentsToAcquireRealEstate0.00.00.0

us-gaap:PaymentsToAcquireRealEstate us-gaap:StatementGeographical, us-gaap:StatementScenario, us-gaap:SubsequentEventType

opi:BrookhavenGA, srt:ScenarioForecast, us-gaap:SubsequentEvent


Payments
Period End2020-12-31
Value15
Percentage of PaymentsToAcquireRealEstate43.1

us-gaap:PaymentsToAcquireRealEstate us-gaap:StatementGeographical, us-gaap:SubsequentEventType

opi:BostonMA, us-gaap:SubsequentEvent


Payments
Period End2021-04-28
Value26
Percentage of PaymentsToAcquireRealEstate0.0

opi:DenverCO, us-gaap:SubsequentEvent


Payments
Period End2020-07-31
Value38
Percentage of PaymentsToAcquireRealEstate0.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value273-27.218-27.223-4.54-76.333-146.386-237.579-402.888-107.529-283.399-609.571-28.779-182.139-43.82-50.5641157-35.993-30.985103-6.353-42.07656-28.016-23.018-26.84924-22.91165720-30.6416320-26.475-45.982251196.783-17.668
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.0-148.3-240.7-61.1-162.1-588.1-27.1-168.5-40.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromIssuanceOfLongTermDebt

opi:SeniorUnsecuredNotes6.375PercentDueIn2050, us-gaap:SeniorNotes


Proceeds
Period End2020-07-312020-06-30
Value156156
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0

opi:SeniorUnsecuredNotesDueIn2025, us-gaap:SeniorNotes


Proceeds
Period End2020-09-302020-06-30
Value251251
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0160.9

opi:TwoPointSixtyFivePercentSeniorUnsecuredNotesDue2026, us-gaap:SeniorNotes


Proceeds
Period End2021-05-31
Value296
Percentage of ProceedsFromIssuanceOfLongTermDebt0.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2021-05-202021-06-302021-02-182021-03-312020-12-312020-08-202020-09-302020-05-212020-06-302020-02-202020-03-312019-12-312019-09-302019-05-162019-06-302019-02-212019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value262626262626262626262626262626262642424242424130303030303030303030302323232323232323191919191717161612
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:PaymentsForRepurchaseOfCommonStock


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value0377000.030000.027000.014000.0396000.063000.000214000.07000.011000.09000.0250000.05000.0025000.0312000.0-2000.0
Percentage of PaymentsForRepurchaseOfCommonStock0.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

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

us-gaap:DebtInstrumentInterestRateStatedPercentage

opi:A22MortgageNotesPayablesDue2020, us-gaap:Mortgages


Debt
Period End2020-08-31
Value2.2
Percentage of DebtInstrumentInterestRateStatedPercentage100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.0
Percentage of LongTermDebtAndCapitalLeaseObligations opi:A22MortgageNotesPayablesDue2020 us-gaap:Mortgages0.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:LongtermDebtType, us-gaap:RealEstateProperties

us-gaap:Mortgages, us-gaap:UnconsolidatedProperties


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3.933.933.933.930.03930.03930.03930.0393
Percentage of DebtInstrumentInterestRateStatedPercentage0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations us-gaap:Mortgages us-gaap:UnconsolidatedProperties0.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:LongtermDebtType, us-gaap:RealEstateProperties

opi:A1750HStreetNW, us-gaap:Mortgages, us-gaap:UnconsolidatedProperties


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value3.693.693.693.690.03690.03690.03690.0369
Percentage of DebtInstrumentInterestRateStatedPercentage0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations opi:A1750HStreetNW us-gaap:Mortgages us-gaap:UnconsolidatedProperties0.00.00.00.00.00.00.00.0

opi:ProsperityMetroPlaza, us-gaap:Mortgages, us-gaap:UnconsolidatedProperties


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value4.094.094.094.090.04090.04090.04090.0409
Percentage of DebtInstrumentInterestRateStatedPercentage0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations opi:ProsperityMetroPlaza us-gaap:Mortgages us-gaap:UnconsolidatedProperties0.00.00.00.00.00.00.00.0

opi:GainLossonExtinguishmentofDebtNet

opi:GainLossonExtinguishmentofDebtNet


Gain
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value00-557000.0-2144000.00-284000.0-71000.0-414000.0
Percentage of GainLossonExtinguishmentofDebtNet0.00.0100.0100.00.0100.0100.0100.0

opi:LessorOperatingLeaseLeaseNotYetCommencedAnnualPercentageIncrease us-gaap:RelatedPartyTransactionsByRelatedParty

opi:LessorOperatingLeaseLeaseNotYetCommencedAnnualPercentageIncrease

opi:SonestaInternationalHotelsCorporation


Lessor
Period End2021-06-30
Value10.0
Percentage of LessorOperatingLeaseLeaseNotYetCommencedAnnualPercentageIncrease100.0

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriod

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriod


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value767.1457.7076.238161715
Percentage of OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriod100.0100.0100.0100.0100.0100.0100.0

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodAreaOfLeasedProperty

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodAreaOfLeasedProperty


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-09-302019-06-30
Value548000.0575000.0139000.0595000.0642000.0759160.0570760.0
Percentage of OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodAreaOfLeasedProperty100.0100.0100.0100.0100.0100.0100.0

opi:RealEstateAcquisitionTerminatedAgreement us-gaap:StatementGeographical

opi:RealEstateAcquisitionTerminatedAgreement

opi:DenverCO


Real
Period End2020-08-31
Value38
Percentage of RealEstateAcquisitionTerminatedAgreement100.0

opi:RealEstateAggregateSalesPrice us-gaap:DisposalGroupClassification

opi:RealEstateAggregateSalesPrice

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value39130250.00.085263287
Percentage of RealEstateAggregateSalesPrice100.0100.0100.00.00.0100.0100.0100.0

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations


Real
Period End2021-06-302021-03-312020-12-31
Value-27.7849105
Percentage of RealEstateAggregateSalesPrice-71.238.0421.3

opi:RealEstateAggregateSalesPrice us-gaap:DisposalGroupClassification, us-gaap:SubsequentEventType

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, us-gaap:SubsequentEvent


Real
Period End2021-04-28
Value0.65
Percentage of RealEstateAggregateSalesPrice0.0

opi:RealEstateAggregateSalesPrice us-gaap:StatementGeographical, us-gaap:DisposalGroupClassification

opi:FairfaxVA, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Real
Period End2020-09-302020-06-302020-03-31
Value0.00.022
Percentage of RealEstateAggregateSalesPrice0.00.026.0

opi:HuntsvilleAL, us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations


Real
Period End2021-03-31
Value39
Percentage of RealEstateAggregateSalesPrice29.8

opi:KansasCityMO, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Real
Period End2021-06-302021-03-31
Value0.00.845
Percentage of RealEstateAggregateSalesPrice0.00.6

opi:LincolnshireIL, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Real
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.012
Percentage of RealEstateAggregateSalesPrice0.00.00.014.1

opi:RichmondVA, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Real
Period End2021-06-302021-03-31
Value0.0130
Percentage of RealEstateAggregateSalesPrice0.099.4

opi:StaffordVA, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Real
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.014
Percentage of RealEstateAggregateSalesPrice0.00.00.016.5

opi:StonehamMA, us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations


Real
Period End2021-03-31
Value10
Percentage of RealEstateAggregateSalesPrice8.2

opi:TrentonNJ, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Real
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.030
Percentage of RealEstateAggregateSalesPrice0.00.00.035.3

opi:WindsorCT, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Real
Period End2020-12-312020-09-302020-06-302020-03-31
Value0.00.00.07.0
Percentage of RealEstateAggregateSalesPrice0.00.00.08.2

opi:RealEstateAggregateSalesPrice us-gaap:StatementGeographical, us-gaap:DisposalGroupClassification, us-gaap:SubsequentEventType

opi:HuntsvilleAL, us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, us-gaap:SubsequentEvent


Real
Period End2021-02-19
Value39
Percentage of RealEstateAggregateSalesPrice0.0

opi:RealEstateAggregateSalesPrice us-gaap:StatementGeographical, us-gaap:SubsequentEventType

opi:FairfaxVA, us-gaap:SubsequentEvent


Real
Period End2020-07-30
Value25
Percentage of RealEstateAggregateSalesPrice0.0

opi:RelatedPartyReimbursementExpense us-gaap:RelatedPartyTransactionsByRelatedParty

opi:RelatedPartyReimbursementExpense

opi:ReitManagementAndResearchLLC


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312019-01-312018-12-312018-09-302018-06-302018-03-31
Value5.9256.0526.2326.4376.2595.9916.4356.856.466.5530.4625.9855.155.0524.969
Percentage of RelatedPartyReimbursementExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

opi:SaleOfRealEstatePropertiesTransactionsCosts us-gaap:DisposalGroupClassification

opi:SaleOfRealEstatePropertiesTransactionsCosts

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations


Sale
Period End2021-03-31
Value2000000.0
Percentage of SaleOfRealEstatePropertiesTransactionsCosts100.0

opi:StockRepurchasedDuringPeriodPricePerShare

opi:StockRepurchasedDuringPeriodPricePerShare


Stock
Period End2021-06-17
Value29.33
Percentage of StockRepurchasedDuringPeriodPricePerShare100.0

opi:StockRepurchasedDuringPeriodPricePerShareNet us-gaap:RelatedPartyTransactionsByRelatedParty

opi:StockRepurchasedDuringPeriodPricePerShareNet

opi:FormerEmployeeOfRMRLLC


Stock
Period End2020-09-302020-06-302020-03-132020-01-09
Value21.6126.2722.6532.89
Percentage of StockRepurchasedDuringPeriodPricePerShareNet100.0100.0100.0100.0

opi:TenantReimbursementIncome

opi:TenantReimbursementIncome


Tenant
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value16171817171820212122
Percentage of TenantReimbursementIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

opi:WeightedAverageAnnualInterestRate us-gaap:CreditFacility

opi:WeightedAverageAnnualInterestRate

us-gaap:LineOfCredit


Weighted
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1.201.20.0130.026-0.0010.0330.0350.03500.0320.030.028
Percentage of WeightedAverageAnnualInterestRate100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value2.4922.4322.4312.4772.4022.2832.4762.562.8632.8410.8770.8930.8910.9650.8150.990.8080.8070.8080.8050.7480.4710.3560.360.3280.3320.3840.3730.2230.330.3380.3390.3320.3310.3340.3390.3350.324
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetAcquisitionConsiderationTransferred us-gaap:StatementGeographical, us-gaap:SubsequentEventType

us-gaap:AssetAcquisitionConsiderationTransferred

opi:BostonMA, us-gaap:SubsequentEvent


Asset
Period End2021-07-28
Value26
Percentage of AssetAcquisitionConsiderationTransferred100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-06-302020-03-31
Value9.3089.1642.81812
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:CommonStockDividendsPerShareCashPaid


Common
Period End2021-05-202021-02-182020-12-312020-08-202020-09-302020-05-212020-02-202019-08-152019-05-162019-02-212017-08-212017-05-222017-02-232016-08-222016-05-232016-02-252015-11-232015-08-242015-05-262015-05-252015-02-262014-11-202014-08-232014-08-222014-05-212014-02-212013-11-222013-10-092013-08-232013-08-222013-07-102013-05-242013-04-302013-02-222013-02-282012-11-302012-10-312012-08-312012-07-312012-05-312012-02-292011-11-302011-08-312011-05-312011-02-28
Value0.550.550.550.550.550.550.550.550.550.550.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.430.420.420.420.420.420.420.420.41
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ConcentrationRiskPercentage1

opi:USGovernment, opi:RealEstateRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-03-312020-03-312019-03-312018-03-31
Value25.90.250.2580.44
Percentage of ConcentrationRiskPercentage1100.0100.0100.0100.0

opi:USGovernmentStateGovernmentsAndOtherGovernment, opi:RealEstateRevenueNet, us-gaap:CustomerConcentrationRisk


Concentration
Period End2021-03-312020-03-312019-03-312018-03-31
Value36.30.3460.3590.632
Percentage of ConcentrationRiskPercentage1140.2138.4139.1143.6

us-gaap:ConcentrationRiskPercentage1 us-gaap:StatementGeographical, us-gaap:ConcentrationRiskByBenchmark

stpr:CA, opi:RealEstateRevenueNet


Concentration
Period End2021-03-312020-03-31
Value12.70.121
Percentage of ConcentrationRiskPercentage149.048.4

stpr:DC, opi:RealEstateRevenueNet


Concentration
Period End2021-03-312020-03-312019-03-31
Value10.90.110.235
Percentage of ConcentrationRiskPercentage142.144.091.1

stpr:MD, opi:RealEstateRevenueNet


Concentration
Period End2021-03-312020-03-31
Value6.70.064
Percentage of ConcentrationRiskPercentage125.925.6

stpr:TX, opi:RealEstateRevenueNet


Concentration
Period End2021-03-312020-03-31
Value7.90.082
Percentage of ConcentrationRiskPercentage130.532.8

stpr:VA, opi:RealEstateRevenueNet


Concentration
Period End2021-03-312020-03-31
Value12.70.152
Percentage of ConcentrationRiskPercentage149.060.8

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value212121212020212222231517161716121111101010109.8729.7529.7379.626
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization

us-gaap:DepreciationAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value556462626462637473773342424447202020181817181717171717171615141413131313121212109.0978.3867.6376.3215.401
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:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-08-202018-09-302018-05-212018-06-302018-02-262018-03-312017-08-212017-05-222017-02-232016-08-222016-07-222016-05-232016-04-132016-02-252015-10-232015-08-242015-07-132015-05-262015-02-262014-08-222014-05-212014-02-212013-10-092013-08-232013-07-102013-05-242013-04-302013-02-222013-02-282012-10-312012-08-312012-07-312012-05-312012-04-302012-02-292012-02-28
Value2626262626262626424242424242413030303030303030303030302323232323232323232323191919191919
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

opi:CumulativeCommonDistributions


Dividends
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2626262626262626424242
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ExtinguishmentOfDebtAmount

opi:A5.9MortgageNotesPayableDue2021, us-gaap:Mortgages


Extinguishment
Period End2020-12-31
Value0.0
Percentage of ExtinguishmentOfDebtAmount0.0

us-gaap:GainLossOnSaleOfProperties

us-gaap:GainLossOnSaleOfProperties


Gain
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302016-12-312015-12-312014-12-312013-12-312013-09-302013-06-302013-03-31
Value0.114540.0330.00.066107111-0.0170.00.00.00.00.00.08.168
Percentage of GainLossOnSaleOfProperties100.0100.0100.00.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.0

us-gaap:GainLossOnSaleOfProperties us-gaap:DisposalGroupClassification

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.114540.0330.0
Percentage of GainLossOnSaleOfProperties100.0100.0100.00.0

us-gaap:GainLossOnSaleOfProperties us-gaap:StatementGeographical, us-gaap:DisposalGroupClassification

opi:FairfaxVA, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2020-09-30
Value0.0
Percentage of GainLossOnSaleOfProperties0.0

opi:KansasCityMO, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2021-06-302021-03-31
Value0.0-0.063
Percentage of GainLossOnSaleOfProperties0.0-0.1

opi:LincolnshireIL, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2020-12-312020-09-30
Value0.0030.0
Percentage of GainLossOnSaleOfProperties9.10.0

opi:RichmondVA, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2021-06-302021-03-31
Value0.11454
Percentage of GainLossOnSaleOfProperties100.0100.1

opi:StaffordVA, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2020-12-312020-09-30
Value0.0670.0
Percentage of GainLossOnSaleOfProperties203.00.0

opi:TrentonNJ, us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations


Gain
Period End2020-12-312020-09-30
Value0.0130.0
Percentage of GainLossOnSaleOfProperties39.40.0

us-gaap:ImpairmentOfRealEstate

us-gaap:ImpairmentOfRealEstate


Impairment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302014-12-312014-09-30
Value487.660.02.9540.00.08.158.5212.383.2042.830.0-0.3166.1169.260.230.00.00.00.00.41.616
Percentage of ImpairmentOfRealEstate100.0100.00.0100.00.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.00.00.00.0100.0100.0

us-gaap:ImpairmentOfRealEstate us-gaap:DisposalGroupClassification

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations


Impairment
Period End2021-06-302021-03-312020-09-302019-09-30
Value267.662.9546.342
Percentage of ImpairmentOfRealEstate54.5100.0100.074.4

us-gaap:ImpairmentOfRealEstate us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations, opi:PropertiesNotYetUnderAgreementToSell


Impairment
Period End2021-06-30
Value14
Percentage of ImpairmentOfRealEstate29.6

us-gaap:ImpairmentOfRealEstate us-gaap:StatementGeographical, us-gaap:DisposalGroupClassification

opi:HuntsvilleAL, us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations


Impairment
Period End2021-03-31
Value2.289
Percentage of ImpairmentOfRealEstate29.9

opi:StonehamMA, us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations


Impairment
Period End2021-03-31
Value5.371
Percentage of ImpairmentOfRealEstate70.1

us-gaap:IncentiveFeeExpense us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:IncentiveFeeExpense

opi:ReitManagementAndResearchLLC


Incentive
Period End2021-06-302021-03-312018-09-302018-06-30
Value5.9115.216-2.15
Percentage of IncentiveFeeExpense100.0100.0100.0100.0

us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-0.58-0.396-0.378-0.279-0.26-0.276-0.686-0.196-0.142-0.235-1.1570.0943.6729.7120.7679.4848.5812.7397.5168.6689.49.9342.568106.094-0.3166.0324.910.118-0.0970.1150.0640.0790.0760.080.1150.0760.0450.0280.0280.0460.0370.0160.035-0.023
Percentage of IncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities

us-gaap:IncreaseDecreaseInAccountsPayableAndAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3.565-9.6093.5122.8367.361-21.7911-13.74513-30.3877.058-8.738.048-9.6794.993-3.16811-1.9892.12-1.1215.548-4.5772.134-2.5284.147-2.6560.3564.7031.551-0.21-1.5173.612-1.1691.566-3.632.2041.59-1.104-4.0164.014.887-0.972-7.8879.576
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:IncreaseDecreaseInDeferredLeasingFees

us-gaap:IncreaseDecreaseInDeferredLeasingFees


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value3.9384.8261.4061.9194.3374.4665.2127.5517.2237.9853.2661.7962.052.0912.1710.7591.0121.0752.1984.5891.421.9892.3330.2851.7110.4121.0070.6290.5111.1791.1611.0431.1820.8933.061.3120.6140.1972.2780.2140.1750.0350.0280.062
Percentage of IncreaseDecreaseInDeferredLeasingFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDueToRelatedParties

us-gaap:IncreaseDecreaseInDueToRelatedParties


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value4.5127.256-1.2350.493-1.1170.832-0.5331.3970.647-29.257-18.53816-1.4153.6850.562-1.0641.6890.152-0.4540.396-0.8021.4941.093-1.3510.7820.201
Percentage of IncreaseDecreaseInDueToRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLeasingReceivables

us-gaap:IncreaseDecreaseInLeasingReceivables


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
Value-3886000.0-11320000.0-891000.02691000.01075000.01087000.04599000.0-1299000.0-1496000.0-14390000.02514000.0-2665000.0-6763000.01893000.08829000.0-967000.0-3846000.0974000.0-1796000.01554000.0-2643000.01215000.03185000.083000.01048000.0-1587000.0-1745000.03090000.02076000.0-3084000.01082000.0424000.0-944000.01003000.01409000.0-1385000.0-81000.0-3397000.0
Percentage of IncreaseDecreaseInLeasingReceivables100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLeasingReceivables us-gaap:UnusualOrInfrequentItem

opi:COVID19Pandemic


Increase
Period End2021-03-312020-12-312020-09-30
Value411000.0-1324000.0-126000.0
Percentage of IncreaseDecreaseInLeasingReceivables-3.6148.6-4.7

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-4245000.0259000.0-3365000.06160000.0-5120000.0-180000.0-3298000.06136000.0-3231000.0-2873000.0-2520000.06263000.0-2574000.0-2296000.0-8413000.03974000.05286000.0-2215000.0-1491000.02586000.0729000.0-1849000.0-1380000.02892000.0672000.0-2699000.0-1268000.03703000.025000.0-2041000.0-1717000.04038000.0-134000.0-1124000.0-1334000.03239000.0-303000.0-1859000.0-1870000.02384000.01425000.0-231000.0-891000.010742000.0
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements


Incremental
Period End2021-03-312020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value35000.000015000.003000.00
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.00.00.00.0100.00.0100.00.0

us-gaap:InterestAndOtherIncome

us-gaap:InterestAndOtherIncome


Interest
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value2000.05000.02000.030000.0706000.0358000.0241000.0248000.0
Percentage of InterestAndOtherIncome100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidCapitalized

us-gaap:InterestPaidCapitalized


Interest
Period End2021-06-302021-03-312020-06-302020-03-31
Value100000.050000.041000.028000.0
Percentage of InterestPaidCapitalized100.0100.0100.0100.0

us-gaap:LeaseIncome

us-gaap:LeaseIncome


Lease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value137144146145145149160167176174
Percentage of LeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeaseExpense


Operating
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value448000.0409000.0446000.0446000.0444000.0411000.0381000.0434000.0
Percentage of OperatingLeaseExpense100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherAmortizationOfDeferredCharges

us-gaap:OtherAmortizationOfDeferredCharges


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1946000.01820000.01679000.01828000.01715000.01665000.01644000.01558000.01421000.01350000.0249000.0189000.0198000.0263000.0131000.0120000.0116000.0111000.0138000.0
Percentage of OtherAmortizationOfDeferredCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-85000.085000.0176000.0-61000.087000.080000.0-269000.0-98000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value0.00.0850.176-0.061-0.110.034-0.198-0.032-0.1590.1260.034-0.041134.63-1.364162.83119.84317-14.738-0.3550.1310.058-0.009-0.0450.0220.0190.0170.014-0.073-0.008-0.0090.035-0.001-0.0010.0040.0150.0390.004
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherCostAndExpenseOperating

us-gaap:OtherCostAndExpenseOperating


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2425272625253030293023212122211415131413131213121212121110111110109.578109.5659.3258.853107.7237.0766.9217.275.1473.963
Percentage of OtherCostAndExpenseOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-903000.0-49000.0-687000.0-585000.0-850000.0-107000.0-104000.0-619000.0-695000.0-593000.0-61000.0-191000.0-332000.0334000.052000.0-159000.0-188000.0-5000.0216000.0-198000.0-407000.0105000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic

us-gaap:ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic


Participating
Period End2021-03-312020-03-31
Value123000.015000.0
Percentage of ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2020-12-312020-09-30
Value15000.0974000.0
Percentage of PaymentsOfDebtIssuanceCosts100.0100.0

us-gaap:PaymentsToDevelopRealEstateAssets

us-gaap:PaymentsToDevelopRealEstateAssets


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value15152623171423178.15712
Percentage of PaymentsToDevelopRealEstateAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital


Proceeds
Period End2021-03-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.1530.0512.370.00.00.02.973.4548.4082.419123.9915.239105.9594.7933.8163.3429.4274.0340.333110.783
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

opi:UnconsolidatedJointVentures


Proceeds
Period End2020-12-312020-09-302019-12-312019-09-30
Value0.2040.2550.3970.852
Percentage of ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital0.00.016.80.0

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt

us-gaap:ProceedsFromIssuanceOfSeniorLongTermDebt


Proceeds
Period End2020-12-312020-09-30
Value0.0263
Percentage of ProceedsFromIssuanceOfSeniorLongTermDebt0.0100.0

us-gaap:ProceedsFromLongTermLinesOfCredit

us-gaap:ProceedsFromLongTermLinesOfCredit


Proceeds
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-302010-12-312010-09-30
Value0.0806341810.03350.0851432545253556515301452525204306525753022962231096123235714696114118113
Percentage of ProceedsFromLongTermLinesOfCredit0.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment

us-gaap:ProceedsFromSaleOfRealEstateHeldforinvestment


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value37129200.0136825728326262
Percentage of ProceedsFromSaleOfRealEstateHeldforinvestment100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateTaxExpense

us-gaap:RealEstateTaxExpense


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1516161615161818181812121212128.8627.9418.1777.8937.5917.5667.6537.0877.7357.6747.417.3847.0277.1666.8126.656.2556.6486.5036.2035.7285.9495.5335.3984.8534.6374.4573.5533.2922.764
Percentage of RealEstateTaxExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent


Reclassification
Period End2020-09-302019-03-31
Value-0.085-0.371
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0

us-gaap:ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Reclassification
Period End2020-09-302019-03-31
Value-0.085-0.371
Percentage of ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent100.0100.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction us-gaap:BalanceSheetLocation, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionAmountsOfTransaction

opi:BuildingsAndImprovements, opi:NetPropertyManagementandConstructionSupervisionFees, opi:ReitManagementAndResearchLLC


Related
Period End2021-06-302021-03-312020-06-302020-03-31
Value0.9790.5320.8860.656
Percentage of RelatedPartyTransactionAmountsOfTransaction100.0100.0100.0100.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction us-gaap:IncomeStatementLocation, us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:OtherOperatingIncomeExpense, opi:NetPropertyManagementandConstructionSupervisionFees, opi:ReitManagementAndResearchLLC


Related
Period End2021-06-302021-03-312020-06-302020-03-31
Value3.9354.084.2424.408
Percentage of RelatedPartyTransactionAmountsOfTransaction401.9766.9478.8672.0

us-gaap:RelatedPartyTransactionAmountsOfTransaction us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

opi:NetPropertyManagementandConstructionSupervisionFees, opi:ReitManagementAndResearchLLC


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value4.9144.6125.3935.1895.1285.0645.3065.6225.5345.4493.7883.4153.4373.349
Percentage of RelatedPartyTransactionAmountsOfTransaction501.9866.90.00.0578.8772.00.00.00.00.00.00.00.00.0

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty

opi:NetPropertyManagementandConstructionSupervisionFees, opi:ReitManagementAndResearchLLC


Related
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value109.4744.1214.2364.3024.6995.1175.1595.3225.722
Percentage of RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfDebt

opi:A22MortgageNotesPayablesDue2020, us-gaap:Mortgages


Repayments
Period End2020-08-31
Value39
Percentage of RepaymentsOfDebt100.0

opi:MortgageNotesPayableDueMay2023355, us-gaap:Mortgages


Repayments
Period End2021-06-30
Value71
Percentage of RepaymentsOfDebt0.0

us-gaap:RepaymentsOfLongTermLinesOfCredit

us-gaap:RepaymentsOfLongTermLinesOfCredit


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value0.0280211702201901518054310.01632530155203010.00.033610.02710.021202142401730211725451756.00.0345331704.03863132
Percentage of RepaymentsOfLongTermLinesOfCredit0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfSecuredDebt

us-gaap:RepaymentsOfSecuredDebt


Repayments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value710.6430.6334046671.0531.0311.0168.9540.9760.9240.9090.899100.3890.3820.3790.3710.360.3531060.432470.5930.610.5860.5630.5520.520.4990.4790.470.4850.4660.4460.4390.4420.3810.2250.2010.1980.180.149
Percentage of RepaymentsOfSecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfSeniorDebt

us-gaap:RepaymentsOfSeniorDebt


Repayments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0.00.00.04000.03500.00.00.0
Percentage of RepaymentsOfSeniorDebt0.00.00.0100.00.0100.00.00.00.0

us-gaap:RevenueFromRelatedParties us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:RevenueFromRelatedParties

opi:ReitManagementAndResearchLLC


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value287000.0288000.0284000.0282000.0274000.0280000.0288000.0288000.0287000.0279000.0263000.0263000.0282000.0218000.0
Percentage of RevenueFromRelatedParties100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:TitleOfIndividual, us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

srt:Officer, us-gaap:CommonStock


Share
Period End2020-09-17
Value23.04
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value1176000.0321000.0865000.01121000.0379000.0889000.0971000.0865000.0887000.0297000.0
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockGrantedDuringPeriodValueSharebasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value1176000.0321000.0864000.01121000.0379000.0888000.0971000.0865000.0887000.0297000.0
Percentage of StockGrantedDuringPeriodValueSharebasedCompensation100.0100.099.9100.0100.099.9100.0100.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:StockRepurchasedDuringPeriodValue


Stock
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302018-09-302018-06-302018-03-31
Value352000.0386000.030000.027000.0396000.063000.0212000.07000.011000.0
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302020-09-302020-06-302020-03-312019-09-302019-06-302018-09-302018-06-302018-03-31
Value352000.0386000.030000.027000.0396000.063000.0212000.07000.011000.0
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StraightLineRent

us-gaap:StraightLineRent


Straight
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value3.8475.3573.1163.9123.4685.5838.1426.9045.6676.7942.3391.992.7443.0912.4670.7111.1041.30.9021.2050.4350.1490.6131.5440.6631.1351.1011.1420.6050.7450.9090.8841.1010.6940.8691.2780.29
Percentage of StraightLineRent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StraightLineRentAdjustments

us-gaap:StraightLineRentAdjustments


Straight
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3.8475.3573.1163.9123.4685.5838.1426.9045.6676.7942.3391.99
Percentage of StraightLineRentAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UtilitiesOperatingExpense

us-gaap:UtilitiesOperatingExpense


Utilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5.316.4325.6077.5645.2017.0127.9339.5187.479.3815.9357.7836.0186.69
Percentage of UtilitiesOperatingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:VariableLeaseIncome

us-gaap:VariableLeaseIncome


Variable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value17181918181921232223
Percentage of VariableLeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

opi:AggregateNetBookValueOfRealEstatePropertiesCollateralized

opi:AggregateNetBookValueOfRealEstatePropertiesCollateralized


Aggregate
Period End2021-06-302021-03-312020-12-312020-09-30
Value190279304307
Percentage of AggregateNetBookValueOfRealEstatePropertiesCollateralized100.0100.0100.0100.0

opi:AggregatePrincipalAmountOfRealEstatePropertiesCollateralized

opi:AggregatePrincipalAmountOfRealEstatePropertiesCollateralized


Aggregate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value98170170171211245326327328
Percentage of AggregatePrincipalAmountOfRealEstatePropertiesCollateralized100.0100.0100.0100.0100.0100.0100.0100.0100.0

opi:AggregatePrincipalAmountOfRealEstatePropertiesCollateralized us-gaap:CreditFacility

us-gaap:LineOfCredit


Aggregate
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value195019501950195019501950195019502015
Percentage of AggregatePrincipalAmountOfRealEstatePropertiesCollateralized1971.61145.71141.41137.2920.7795.1597.8595.9613.8

opi:AreaOfRealEstatePropertyPercentageUponCompletionOfReDevelopment us-gaap:RelatedPartyTransactionsByRelatedParty

opi:AreaOfRealEstatePropertyPercentageUponCompletionOfReDevelopment

opi:SonestaInternationalHotelsCorporation


Area
Period End2021-06-30
Value54.0
Percentage of AreaOfRealEstatePropertyPercentageUponCompletionOfReDevelopment100.0

opi:AssetAcquisitionAcquisitionRelatedCosts

opi:AssetAcquisitionAcquisitionRelatedCosts


Asset
Period End2021-06-302020-12-31
Value694000.0590000.0
Percentage of AssetAcquisitionAcquisitionRelatedCosts100.0100.0

opi:AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateLeaseObligation

opi:AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateLeaseObligation


Asset
Period End2021-06-30
Value9088000.0
Percentage of AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateLeaseObligation100.0

opi:AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateLeaseObligation us-gaap:StatementGeographical

opi:ChicagoIL


Asset
Period End2021-06-30
Value9088000.0
Percentage of AssetAcquisitionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealEstateLeaseObligation100.0

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearFive us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearFive

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value5.0
Percentage of ConcentrationRiskPercentageForTerminationRightExercisableInYearFive100.0

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearFour us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearFour

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value2.2
Percentage of ConcentrationRiskPercentageForTerminationRightExercisableInYearFour100.0

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearNine us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearNine

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value0.5
Percentage of ConcentrationRiskPercentageForTerminationRightExercisableInYearNine100.0

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearSix us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearSix

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value2.9
Percentage of ConcentrationRiskPercentageForTerminationRightExercisableInYearSix100.0

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearThree us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearThree

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value1.3
Percentage of ConcentrationRiskPercentageForTerminationRightExercisableInYearThree100.0

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearTwo us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageForTerminationRightExercisableInYearTwo

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value3.4
Percentage of ConcentrationRiskPercentageForTerminationRightExercisableInYearTwo100.0

opi:ConcentrationRiskPercentageforTerminationRightExercisableNextTwelveMonths us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageforTerminationRightExercisableNextTwelveMonths

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value1.4
Percentage of ConcentrationRiskPercentageforTerminationRightExercisableNextTwelveMonths100.0

opi:ConcentrationRiskPercentageforTerminationRightExercisableinYearEight us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageforTerminationRightExercisableinYearEight

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value3.1
Percentage of ConcentrationRiskPercentageforTerminationRightExercisableinYearEight100.0

opi:ConcentrationRiskPercentageforTerminationRightExercisableinYearSeven us-gaap:MajorCustomers, us-gaap:ConcentrationRiskByBenchmark, us-gaap:ConcentrationRiskByType

opi:ConcentrationRiskPercentageforTerminationRightExercisableinYearSeven

opi:TenantWithExercisableTerminationRights, opi:LessorOperatingLeasePaymentToBeReceived, us-gaap:CustomerConcentrationRisk


Concentration
Period End2020-12-31
Value1.9
Percentage of ConcentrationRiskPercentageforTerminationRightExercisableinYearSeven100.0

opi:DebtInstrumentFaceAmountOfAdditionalOption us-gaap:DebtInstrument, us-gaap:LongtermDebtType

opi:DebtInstrumentFaceAmountOfAdditionalOption

opi:SeniorUnsecuredNotes6.375PercentDueIn2050, us-gaap:SeniorNotes


Debt
Period End2020-07-312020-06-30
Value1222
Percentage of DebtInstrumentFaceAmountOfAdditionalOption100.0100.0

opi:LesseeOperatingLeaseTemporaryRentalAssistance us-gaap:SubsequentEventType, us-gaap:UnusualOrInfrequentItem

opi:LesseeOperatingLeaseTemporaryRentalAssistance

us-gaap:SubsequentEvent, opi:COVID19Pandemic


Lessee
Period End2021-04-262021-02-16
Value2483000.02546000.0
Percentage of LesseeOperatingLeaseTemporaryRentalAssistance100.0100.0

opi:LesseeOperatingLeaseTemporaryRentalAssistance us-gaap:UnusualOrInfrequentItem

opi:COVID19Pandemic


Lessee
Period End2020-07-27
Value2550000.0
Percentage of LesseeOperatingLeaseTemporaryRentalAssistance0.0

opi:LessorOperatingLeaseLeaseNotYetCommencedAnnualBaseRent us-gaap:RelatedPartyTransactionsByRelatedParty

opi:LessorOperatingLeaseLeaseNotYetCommencedAnnualBaseRent

opi:SonestaInternationalHotelsCorporation


Lessor
Period End2021-06-30
Value6436000.0
Percentage of LessorOperatingLeaseLeaseNotYetCommencedAnnualBaseRent100.0

opi:LessorOperatingLeasePercentageOfAnnualizedRentalIncome us-gaap:SubsequentEventType, us-gaap:UnusualOrInfrequentItem

opi:LessorOperatingLeasePercentageOfAnnualizedRentalIncome

us-gaap:SubsequentEvent, opi:COVID19Pandemic


Lessor
Period End2021-04-262021-02-16
Value3.23.3
Percentage of LessorOperatingLeasePercentageOfAnnualizedRentalIncome100.0100.0

opi:LessorOperatingLeasePercentageOfAnnualizedRentalIncome us-gaap:UnusualOrInfrequentItem

opi:COVID19Pandemic


Lessor
Period End2020-07-27
Value3.6
Percentage of LessorOperatingLeasePercentageOfAnnualizedRentalIncome0.0

opi:LiabilitiesHeldForSaleProperty

opi:LiabilitiesHeldForSaleProperty


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2.4270.0840.8910.3310.00.014161.9530.1784.271
Percentage of LiabilitiesHeldForSaleProperty100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodCommittedButUnspentTenantRelatedObligations

opi:OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodCommittedButUnspentTenantRelatedObligations


Operating
Period End2021-06-302021-03-312020-12-312020-09-30
Value113505161
Percentage of OperatingLeasesCommittedExpendituresOnLeasesExecutedInPeriodCommittedButUnspentTenantRelatedObligations100.0100.0100.0100.0

opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAggregateBookValueOfRealEstateAssetsOrTransferredAssets us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAggregateBookValueOfRealEstateAssetsOrTransferredAssets

opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-312019-12-31
Value0.50.005
Percentage of RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAggregateBookValueOfRealEstateAssetsOrTransferredAssets100.0100.0

opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageClosingStockPriceOnStockExchange us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageClosingStockPriceOnStockExchange

opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-31
Value0.7
Percentage of RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageClosingStockPriceOnStockExchange100.0

opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageHistoricalCostOfRealEstateInvestmentsExcludingTransferredAssetsForInvestmentsUptoSpecifiedAmount us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageHistoricalCostOfRealEstateInvestmentsExcludingTransferredAssetsForInvestmentsUptoSpecifiedAmount

opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-31
Value0.7
Percentage of RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageHistoricalCostOfRealEstateInvestmentsExcludingTransferredAssetsForInvestmentsUptoSpecifiedAmount100.0

opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageMarketCapitalizationExceedingSpecifiedAmount us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageMarketCapitalizationExceedingSpecifiedAmount

opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-31
Value0.5
Percentage of RelatedPartyTransactionBaseManagementFeePayableAsPercentageOfAverageMarketCapitalizationExceedingSpecifiedAmount100.0

opi:RelatedPartyTransactionBaseManagementFeePayableAverageMarketCapitalization us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionBaseManagementFeePayableAverageMarketCapitalization

srt:Minimum, opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-31
Value250
Percentage of RelatedPartyTransactionBaseManagementFeePayableAverageMarketCapitalization100.0

opi:RelatedPartyTransactionBaseManagementFeePayableThresholdAmountOfAverageMarketCapitalization us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionBaseManagementFeePayableThresholdAmountOfAverageMarketCapitalization

srt:Maximum, opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-31
Value250
Percentage of RelatedPartyTransactionBaseManagementFeePayableThresholdAmountOfAverageMarketCapitalization100.0

opi:RelatedPartyTransactionBaseManagementFeePayableThresholdAmountOfRealEstateInvestments us-gaap:Range, us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionBaseManagementFeePayableThresholdAmountOfRealEstateInvestments

srt:Minimum, opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-31
Value250
Percentage of RelatedPartyTransactionBaseManagementFeePayableThresholdAmountOfRealEstateInvestments100.0

opi:RelatedPartyTransactionPercentageForLimitationAndAdjustmentsOfIncentiveManagementFeePayable us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionPercentageForLimitationAndAdjustmentsOfIncentiveManagementFeePayable

opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-312019-12-31
Value12.00.12
Percentage of RelatedPartyTransactionPercentageForLimitationAndAdjustmentsOfIncentiveManagementFeePayable100.0100.0

opi:RelatedPartyTransactionPercentageOfBaseBusinessManagementFeePayableInCommonShares us-gaap:RelatedPartyTransactionsByRelatedParty, us-gaap:TransactionType

opi:RelatedPartyTransactionPercentageOfBaseBusinessManagementFeePayableInCommonShares

opi:ReitManagementAndResearchLLC, opi:AmendedAndRestateBusinessManagementAgreement


Related
Period End2020-12-31
Value1.5
Percentage of RelatedPartyTransactionPercentageOfBaseBusinessManagementFeePayableInCommonShares100.0

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances


Real
Period End2020-12-312019-12-312018-12-31
Value169309335
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances100.0100.0100.0

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances us-gaap:MajorPropertyClass

opi:SECScheduleIIIRealEstateAssetsIncludingAssetsHeldForSale


Real
Period End2020-12-31
Value169
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances100.0

srt:RealEstateAndAccumulatedDepreciationAmountOfEncumbrances us-gaap:RealEstateAndAccumulatedDepreciationDescriptionOfProperty

opi:A1211ConnecticutAvenueNWWashingtonDC


Real
Period End2020-12-312019-12-31
Value2526
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances15.28.6

opi:A1401KStreetNWWashingtonDC


Real
Period End2020-12-312019-12-31
Value2324
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances14.17.9

opi:A351401501ElliotAveWestSeattleWA


Real
Period End2020-12-31
Value70
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances41.3

opi:A400SouthJeffersonStreetChicagoIL


Real
Period End2020-12-312019-12-31
Value4949
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances29.215.9

opi:WestAlamedaParkway12795LakewoodCO


Real
Period End2020-12-312019-12-31
Value0.351.687
Percentage of RealEstateAndAccumulatedDepreciationAmountOfEncumbrances0.20.5

srt:RealEstateFederalIncomeTaxBasis

srt:RealEstateFederalIncomeTaxBasis


Real
Period End2020-12-31
Value7059
Percentage of RealEstateFederalIncomeTaxBasis100.0

us-gaap:AccountsReceivableNet

us-gaap:AccountsReceivableNet


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value90941011009590837070677255616561474750484946464540403736373431333130312926272629222119
Percentage of AccountsReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedAmortizationDeferredFinanceCosts us-gaap:CreditFacility

us-gaap:AccumulatedAmortizationDeferredFinanceCosts

us-gaap:LineOfCredit


Accumulated
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value2069000.01059000.049000.03849000.02617000.01385000.0
Percentage of AccumulatedAmortizationDeferredFinanceCosts100.0100.0100.0100.0100.0100.0

us-gaap:AreaOfRealEstateProperty

us-gaap:AreaOfRealEstateProperty


Area
Period End2021-06-302020-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value0.8770.1630.83018510111010
Percentage of AreaOfRealEstateProperty100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsHeldForSaleNotPartOfDisposalGroup

us-gaap:AssetsHeldForSaleNotPartOfDisposalGroup


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value474775200.00.070155126232534080.0
Percentage of AssetsHeldForSaleNotPartOfDisposalGroup100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.00.0

us-gaap:BelowMarketLeaseAccumulatedAmortization

us-gaap:BelowMarketLeaseAccumulatedAmortization


Below
Period End2020-12-312019-12-312018-12-312017-12-31
Value10141112
Percentage of BelowMarketLeaseAccumulatedAmortization100.0100.0100.0100.0

us-gaap:BelowMarketLeaseGross

us-gaap:BelowMarketLeaseGross


Below
Period End2020-12-312019-12-312018-12-312017-12-31
Value21283125
Percentage of BelowMarketLeaseGross100.0100.0100.0100.0

us-gaap:CumulativeDividends

us-gaap:CumulativeDividends


Cumulative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1243121611901163113711101084105710311004978807
Percentage of CumulativeDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount

us-gaap:DebtInstrumentCarryingAmount


Debt
Period End2020-12-312019-12-312018-12-312017-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value224223863311226311511149114211391085735605597510466470492610471444440164
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

opi:A4.220MortgageNotesPayableDue2022, us-gaap:Mortgages


Debt
Period End2020-12-312019-12-312018-12-31
Value252627
Percentage of DebtInstrumentCarryingAmount1.21.10.8

opi:A4.50SeniorUnsecuredNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-12-312019-12-312018-12-31
Value650400400
Percentage of DebtInstrumentCarryingAmount29.016.812.1

opi:A4.800MortgageNotesPayableDue2023, us-gaap:Mortgages


Debt
Period End2020-12-312019-12-312018-12-31
Value232424
Percentage of DebtInstrumentCarryingAmount1.11.00.7

opi:A6375SeniorUnsecuredNotesDue2050, us-gaap:SeniorNotes


Debt
Period End2020-12-31
Value162
Percentage of DebtInstrumentCarryingAmount7.2

opi:A8.150MortgageNotesPayableDue2021, us-gaap:Mortgages


Debt
Period End2020-12-312019-12-312018-12-31
Value0.351.6832.912
Percentage of DebtInstrumentCarryingAmount0.00.10.1

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

us-gaap:DebtInstrumentFaceAmount

opi:A4.50SeniorUnsecuredNotesDue2025, us-gaap:SeniorNotes


Debt
Period End2020-09-30
Value250
Percentage of DebtInstrumentFaceAmount100.0

opi:SeniorUnsecuredNotes450PercentDueIn2025, us-gaap:SeniorNotes


Debt
Period End2020-09-30
Value250
Percentage of DebtInstrumentFaceAmount100.0

opi:SeniorUnsecuredNotes6.375PercentDueIn2050, us-gaap:SeniorNotes


Debt
Period End2020-07-312020-06-30
Value162150
Percentage of DebtInstrumentFaceAmount0.00.0

opi:SeniorUnsecuredNotesDueIn2025, us-gaap:SeniorNotes


Debt
Period End2020-09-30
Value400
Percentage of DebtInstrumentFaceAmount160.0

opi:TwoPointSixtyFivePercentSeniorUnsecuredNotesDue2026, us-gaap:SeniorNotes


Debt
Period End2021-05-31
Value300
Percentage of DebtInstrumentFaceAmount0.0

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

opi:SeniorUnsecuredNotes6.375PercentDueIn2050, us-gaap:SeniorNotes, us-gaap:SubsequentEvent


Debt
Period End2020-07-31
Value12
Percentage of DebtInstrumentFaceAmount0.0

us-gaap:DebtInstrumentRepurchasedFaceAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentRepurchasedFaceAmount

opi:SeniorUnsecuredNotes5875PercentDue2046, us-gaap:SeniorNotes


Debt
Period End2021-06-30
Value310
Percentage of DebtInstrumentRepurchasedFaceAmount100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2020-12-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value394547505618
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet us-gaap:LongtermDebtType

opi:SeniorNotesAndMortgages


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value2937394244414555
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet0.00.0100.00.00.00.0100.098.5

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet


Debt
Period End2020-12-31
Value16
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0

us-gaap:DeferredCostsLeasingAccumulatedAmortization

us-gaap:DeferredCostsLeasingAccumulatedAmortization


Deferred
Period End2020-12-312019-12-312018-12-312012-12-312011-12-312010-12-31
Value5.9855.2164.331.7342.612.182
Percentage of DeferredCostsLeasingAccumulatedAmortization100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCostsLeasingAccumulatedAmortization us-gaap:StatementOperatingActivitiesSegment

us-gaap:SegmentContinuingOperations


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value171513106.966.0013.9512.3171.514
Percentage of DeferredCostsLeasingAccumulatedAmortization285.1299.3304.10.00.00.00.00.087.3

us-gaap:DeferredCostsLeasingGross us-gaap:StatementOperatingActivitiesSegment

us-gaap:DeferredCostsLeasingGross

us-gaap:SegmentContinuingOperations


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value59553832282015139.134
Percentage of DeferredCostsLeasingGross100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCostsLeasingNet

us-gaap:DeferredCostsLeasingNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value464442444542403734302522222222222121212020171412121111111111119.5239.1918.3017.6615.6963.4983.0733.0741.0590.9761.002
Percentage of DeferredCostsLeasingNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsGross us-gaap:CreditFacility

us-gaap:DeferredFinanceCostsGross

us-gaap:LineOfCredit


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value4.1254.1254.1255.2345.2345.234
Percentage of DeferredFinanceCostsGross100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredFinanceCostsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value17101215149.875101112126.7853.6183.5563.9114.3664.8225.2715.7186.1696.6247.0755.552.4882.9713.935
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRentReceivablesNet

us-gaap:DeferredRentReceivablesNet


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312011-12-312010-12-31
Value747368666360544745403433322927242422212019191817171515131211107.4553.9012.173
Percentage of DeferredRentReceivablesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPayableCurrentAndNoncurrent us-gaap:SubsequentEventType

us-gaap:DividendsPayableCurrentAndNoncurrent

us-gaap:SubsequentEvent


Dividends
Period End2021-07-152021-04-152021-01-142020-10-152019-10-17
Value2626262626
Percentage of DividendsPayableCurrentAndNoncurrent100.0100.0100.0100.0100.0

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent

us-gaap:DueToRelatedPartiesCurrentAndNoncurrent


Due
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value17136.1147.3496.8567.9737.1417.6746.5935.62634237.1298.5444.8594.2975.3613.6723.523.9743.5784.382.8861.7933.1442.3622.1611.9492.7342.422.4741.7842.8492.7413.7197.2312.8783.5964.0716.6333.061.348
Percentage of DueToRelatedPartiesCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:PlanName

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

opi:ShareAwardPlan


Employee
Period End2020-12-31
Value3338000.0
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:EquityMethodInvestmentAggregateCost us-gaap:RelatedPartyTransactionsByRelatedParty

us-gaap:EquityMethodInvestmentAggregateCost

opi:AffiliatesInsuranceCompany


Equity
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-31
Value11000.011000.011000.0298000.09459000.09422000.09221000.08751000.08751000.08304000.0
Percentage of EquityMethodInvestmentAggregateCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity us-gaap:RealEstateProperties

us-gaap:EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity

us-gaap:UnconsolidatedProperties


Equity
Period End2021-06-302021-03-312020-12-312020-09-302018-09-302018-06-302018-03-312017-12-31
Value7.227.3417.4637.5848.5658.6888.8118.933
Percentage of EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOwnershipPercentage

opi:JointVentureProperty1


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value51.051.051.050.00.50.50.50.50.50.5
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

opi:JointVentureProperty2


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value50.050.050.051.00.510.510.510.510.510.51
Percentage of EquityMethodInvestmentOwnershipPercentage98.098.098.0102.0102.0102.0102.0102.0102.0102.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RealEstateProperties

opi:A1750HStreetNW, us-gaap:UnconsolidatedProperties


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value50.050.050.050.00.50.50.50.50.50.5
Percentage of EquityMethodInvestmentOwnershipPercentage98.098.098.0100.0100.0100.0100.0100.0100.0100.0

opi:ProsperityMetroPlaza, us-gaap:UnconsolidatedProperties


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value51.051.051.051.00.510.510.510.510.510.51
Percentage of EquityMethodInvestmentOwnershipPercentage100.0100.0100.0102.0102.0102.0102.0102.0102.0102.0

us-gaap:EquityMethodInvestments us-gaap:RealEstateProperties

us-gaap:EquityMethodInvestments

us-gaap:UnconsolidatedProperties


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value363737383939394041424345464850
Percentage of EquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:RealEstateProperties

opi:A1750HStreetNW, us-gaap:UnconsolidatedProperties


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1515161616171717181919
Percentage of EquityMethodInvestments41.641.942.342.742.943.243.443.644.144.745.1

opi:ProsperityMetroPlaza, us-gaap:UnconsolidatedProperties


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value2121212222222222232323
Percentage of EquityMethodInvestments58.458.157.757.357.156.856.656.455.955.354.9

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value19292027
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-312012-12-312011-12-312010-12-31
Value335332153139321812
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization1737.61110.8733.6513.20.00.00.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive us-gaap:StatementOperatingActivitiesSegment

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:SegmentContinuingOperations


Finite
Period End2020-12-31
Value88
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths us-gaap:StatementOperatingActivitiesSegment

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:SegmentContinuingOperations


Finite
Period End2020-12-31
Value131
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive us-gaap:StatementOperatingActivitiesSegment

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:SegmentContinuingOperations


Finite
Period End2020-12-31
Value45
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour us-gaap:StatementOperatingActivitiesSegment

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:SegmentContinuingOperations


Finite
Period End2020-12-31
Value69
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree us-gaap:StatementOperatingActivitiesSegment

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:SegmentContinuingOperations


Finite
Period End2020-12-31
Value91
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo us-gaap:StatementOperatingActivitiesSegment

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:SegmentContinuingOperations


Finite
Period End2020-12-31
Value112
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:AboveMarketLeases


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value34616246
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0

us-gaap:LeasesAcquiredInPlace


Finite
Period End2020-12-312019-12-312018-12-312017-12-31
Value86810321168472
Percentage of FiniteLivedIntangibleAssetsGross2483.31666.51877.61026.0

us-gaap:InvestmentBuildingAndBuildingImprovements

us-gaap:InvestmentBuildingAndBuildingImprovements


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value2982265026912685269126722652270229413001302020502258231323481660165216401620152815181509144314331430143014281420143913411324126712831281128812681147113011291040984833
Percentage of InvestmentBuildingAndBuildingImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsNonrecurring


Investments
Period End2021-06-302021-03-312020-09-30
Value6.04921
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring


Investments
Period End2021-06-30
Value27
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure455.0

us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsNonrecurring


Investments
Period End2021-06-302021-03-312020-09-30
Value334921
Percentage of InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure555.0100.0100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceived

us-gaap:LessorOperatingLeasePaymentsToBeReceived


Lessor
Period End2020-12-31
Value2692
Percentage of LessorOperatingLeasePaymentsToBeReceived100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFiveYears


Lessor
Period End2020-12-31
Value234
Percentage of LessorOperatingLeasePaymentsToBeReceivedFiveYears100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedFourYears


Lessor
Period End2020-12-31
Value316
Percentage of LessorOperatingLeasePaymentsToBeReceivedFourYears100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths

us-gaap:LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths


Lessor
Period End2020-12-31
Value474
Percentage of LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThereafter


Lessor
Period End2020-12-31
Value842
Percentage of LessorOperatingLeasePaymentsToBeReceivedThereafter100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedThreeYears


Lessor
Period End2020-12-31
Value389
Percentage of LessorOperatingLeasePaymentsToBeReceivedThreeYears100.0

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears

us-gaap:LessorOperatingLeasePaymentsToBeReceivedTwoYears


Lessor
Period End2020-12-31
Value435
Percentage of LessorOperatingLeasePaymentsToBeReceivedTwoYears100.0

us-gaap:LineOfCredit

us-gaap:LineOfCredit


Line
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-302010-12-31
Value3852003480.021065801754674525705705651551601602531111711459551841951501576925274916727345282338118
Percentage of LineOfCredit100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:CreditFacility

us-gaap:LineOfCredit


Line
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-04-262016-03-312015-12-312015-10-272015-09-302015-06-302015-03-312015-02-162015-01-312014-12-312013-12-31
Value3852003480.021065801754674525705705651551603033111171071145955221550.0157
Percentage of LineOfCredit100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.00.00.00.0100.0

us-gaap:SeniorNotes


Line
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value20622072207218101660206024102410
Percentage of LineOfCredit535.60.00.0905.0477.0981.03707.73012.5

us-gaap:LineOfCredit us-gaap:CreditFacility, us-gaap:SubsequentEventType

us-gaap:LineOfCredit, us-gaap:SubsequentEvent


Line
Period End2021-07-282020-07-292020-04-302020-02-192019-10-312019-08-012019-04-302019-02-252018-10-302017-10-302017-07-252017-04-252015-07-282015-04-29
Value38018035533518540065110325450.01609945
Percentage of LineOfCredit0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312015-12-312014-11-212014-11-20
Value750750750750750750750750750750750750750750750750750750750750550
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LineOfCredit


Line
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value365750750750550402750540685670575
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility, us-gaap:SubsequentEventType

us-gaap:LineOfCredit, us-gaap:SubsequentEvent


Line
Period End2021-07-282021-04-282021-02-182020-10-292020-07-292020-04-302020-02-192019-10-312019-08-012019-04-302019-02-25
Value370750750750570395415565350685640
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtFairValue us-gaap:FairValueByMeasurementBasis

us-gaap:LongTermDebtFairValue

us-gaap:CarryingReportedAmountFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value21312204220222011976186323402339268726862692112511261127
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value22732331233522691995178724512451275727212665113511451164
Percentage of LongTermDebtFairValue106.7105.7106.0103.1100.995.9104.7104.8102.6101.399.0100.9101.7103.3

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-31
Value472
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value1540000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value650
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value350
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value143
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value625
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:MortgageLoansOnRealEstate

us-gaap:MortgageLoansOnRealEstate


Mortgage
Period End2020-12-31
Value1113000.0
Percentage of MortgageLoansOnRealEstate100.0

us-gaap:OffMarketLeaseUnfavorable

us-gaap:OffMarketLeaseUnfavorable


Off
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value18101011111213151718208.7591112138.8329.42310101111121213141515161718191617181914101011111213
Percentage of OffMarketLeaseUnfavorable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities

us-gaap:OtherLiabilities


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value12710311611611510612511815911414564807489636452545256485048502326252221232318191921191820211714
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAccumulatedDepreciation

us-gaap:RealEstateAccumulatedDepreciation


Real
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value451387375341296255219187175156131113100
Percentage of RealEstateAccumulatedDepreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements


Real
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value269126523020162014431428132412881129
Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfLand

us-gaap:RealEstateAndAccumulatedDepreciationCarryingAmountOfLand


Real
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value830840924267253254243244224
Percentage of RealEstateAndAccumulatedDepreciationCarryingAmountOfLand100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements

us-gaap:RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements


Real
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value300232221157123106877470
Percentage of RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements


Real
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value239524252804146413201322123712151060
Percentage of RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfLand

us-gaap:RealEstateAndAccumulatedDepreciationInitialCostOfLand


Real
Period End2020-12-312019-12-312018-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value830839923266252253242243223
Percentage of RealEstateAndAccumulatedDepreciationInitialCostOfLand100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateGrossAtCarryingValue

us-gaap:RealEstateGrossAtCarryingValue


Real
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-312008-12-31
Value3522349339442975188816961682156815331354977576490
Percentage of RealEstateGrossAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateHeldforsale us-gaap:DisposalGroupClassification

us-gaap:RealEstateHeldforsale

us-gaap:DisposalGroupHeldforsaleNotDiscontinuedOperations


Real
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312019-09-30
Value4145551861170
Percentage of RealEstateHeldforsale100.0100.0100.0100.0100.0100.0

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
Value455467451436422403387375394386375363358353341331320308296285275265255246238229219210205196187179190182175172164164156149143131
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:RealEstateInvestmentPropertyAtCost

us-gaap:RealEstateInvestmentPropertyAtCost


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
Value38473474352235263534351534933556381639203944249928452936297519291921190918881788177617671696168716831684168216741697158815681506152615241533151013761355135412541179977
Percentage of RealEstateInvestmentPropertyAtCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RealEstateInvestmentPropertyAtCost us-gaap:StatementOperatingActivitiesSegment

us-gaap:SegmentContinuingOperations


Real
Period End2021-06-302021-03-312020-12-312020-09-302019-09-302019-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value38893520357735443727392929751929192119091888178817791770169916901687168417121705169715881568
Percentage of RealEstateInvestmentPropertyAtCost101.1101.3101.6100.5104.8103.0100.0100.0100.0100.0100.0100.0100.2100.2100.2100.2100.2100.0101.8101.8100.0100.0100.0

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
Value33923007307030903112311231053181342235333569213524872583263315981601160115911502150115011440144014451455146214641492139113801327133613411357133712111191119811041036846
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:RealEstateInvestmentsJointVentures

us-gaap:RealEstateInvestmentsJointVentures


Real
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value3637373839393940414243454648500.0
Percentage of RealEstateInvestmentsJointVentures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RestrictedCash

us-gaap:RestrictedCash


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1.4141714125.6164.3496.9524.0313.5834.4643.5943.111
Percentage of RestrictedCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashAndCashEquivalents


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1.4141714125.6164.3496.9524.0313.5834.4643.5942.3542.4484.7663.1110.5090.3440.7030.530.5140.3440.7131.0221.332.4543.0422.282.3012.5012.3441.6891.591.7362.1641.5532.1893.972.2011.7361.8581.5931.548
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SecuredDebt

us-gaap:SecuredDebt


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value9816916917021024430931132532633517618018218326262727282829136137185186187188189104909191929393949495454546
Percentage of SecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SecuredDebt us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value98169169170210244323324325326335112611279706746746746746743754844855335345355361891049091
Percentage of SecuredDebt100.0100.0100.0100.0100.0100.0104.2104.2100.0100.0100.0618.9615.63652.42499.32460.82423.72388.72355.41291.3354.7352.8287.5286.3285.1283.9100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure


Secured
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1011741741742142543313353333283361150116410137026946757097053894904985475525485461941089596
Percentage of SecuredDebt103.2103.4103.1102.5101.7104.2107.0107.9102.4100.8100.3631.8636.03816.02604.02532.02427.02511.32461.91340.3358.8362.3295.1296.4292.2289.2102.6104.1105.1105.6

us-gaap:SeniorNotes

us-gaap:SeniorNotes


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value20322035203320311766161920172015236223602357945945944944943647647646646646346347347347347347347
Percentage of SeniorNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SeniorNotes us-gaap:DebtInstrument, us-gaap:FairValueByMeasurementBasis

opi:A2650SeniorUnsecuredNotesDue2025, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2021-06-30
Value296
Percentage of SeniorNotes14.6

opi:A2650SeniorUnsecuredNotesDue2025, us-gaap:EstimateOfFairValueFairValueDisclosure


Senior
Period End2021-06-30
Value303
Percentage of SeniorNotes15.0

opi:A4.15SeniorUnsecuredNotesDue2022, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value299298298298298298297297297297296
Percentage of SeniorNotes14.714.714.714.716.918.414.814.812.612.612.6

opi:A4.15SeniorUnsecuredNotesDue2022, us-gaap:EstimateOfFairValueFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value305307306303299292307306304303296
Percentage of SeniorNotes15.015.115.114.916.918.115.215.212.912.912.6

opi:A4.25SeniorUnsecuredNotesDue2024, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value343342342341341340340339338338337
Percentage of SeniorNotes16.916.816.816.819.321.016.916.814.314.314.3

opi:A4.25SeniorUnsecuredNotesDue2024, us-gaap:EstimateOfFairValueFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value371368365352347337364359352336337
Percentage of SeniorNotes18.318.118.017.319.620.818.117.914.914.214.3

opi:A4.50SeniorUnsecuredNotesDue2025, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value637636635635382381381380379378377
Percentage of SeniorNotes31.431.331.331.321.723.618.918.916.016.016.0

opi:A4.50SeniorUnsecuredNotesDue2025, us-gaap:EstimateOfFairValueFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value706686688659399361419413401387377
Percentage of SeniorNotes34.833.733.932.422.622.320.820.517.016.416.0

opi:A4SeniorUnsecuredNotesDue2022, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value299299298298298297297297297296296
Percentage of SeniorNotes14.714.714.714.716.918.414.814.812.612.612.6

opi:A4SeniorUnsecuredNotesDue2022, us-gaap:EstimateOfFairValueFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value309306306304299294306306303300295
Percentage of SeniorNotes15.215.015.115.017.018.215.215.212.812.712.5

opi:A5785SeniorUnsecuredNotesDue2046, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2020-12-312019-12-31
Value301300
Percentage of SeniorNotes14.814.9

opi:SeniorUnsecuredNotes5.875PercentDueIn2046, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value301301301301301300300300300300
Percentage of SeniorNotes14.814.814.817.018.614.914.912.712.712.7

opi:SeniorUnsecuredNotes5.875PercentDueIn2046, us-gaap:EstimateOfFairValueFairValueDisclosure


Senior
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value312322310288248322328311313274
Percentage of SeniorNotes15.315.815.316.315.316.016.313.213.311.6

opi:SeniorUnsecuredNotes5875PercentDue2046, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2020-12-31
Value301
Percentage of SeniorNotes14.8

opi:SeniorUnsecuredNotes5875PercentDue2046, us-gaap:EstimateOfFairValueFairValueDisclosure


Senior
Period End2020-12-31
Value322
Percentage of SeniorNotes15.8

opi:SeniorUnsecuredNotes6.375PercentDueIn2050, us-gaap:CarryingReportedAmountFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1561561561561440.0
Percentage of SeniorNotes7.77.77.77.78.20.0

opi:SeniorUnsecuredNotes6.375PercentDueIn2050, us-gaap:EstimateOfFairValueFairValueDisclosure


Senior
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1741741711651470.0
Percentage of SeniorNotes8.68.68.48.28.40.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

opi:ShareAwardPlan


Share
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value29.2640.1673.2578.2482.36
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0

Line plots across dimensions of each concept


us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:Mortgages')
Gains Losses On Extinguishment Of Debtus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:SeniorNotes')
Proceeds From Issuance Of Long Term Debtus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:LongtermDebtType, us-gaap:RealEstateProperties
(None, 'us-gaap:Mortgages', 'us-gaap:UnconsolidatedProperties')
Debt Instrument Interest Rate Stated Percentageus-gaap: Schedule Of Equity Method Investment Equity Method Investee Name, us-gaap: Longterm Debt Type, us-gaap: Real Estate Properties