3.19.3.a.u2 html 462 528 1 true 157 0 false 15 false false R1.htm 0001000 - Document - Cover Page Sheet http://www.washreit.com/role/CoverPage Cover Page Cover 1 false false R2.htm 1001000 - Statement - Consolidated Balance Sheets Sheet http://www.washreit.com/role/ConsolidatedBalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 1001501 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://www.washreit.com/role/ConsolidatedBalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 1002000 - Statement - Consolidated Statements of Operations Sheet http://www.washreit.com/role/ConsolidatedStatementsOfOperations Consolidated Statements of Operations Statements 4 false false R5.htm 1003000 - Statement - Consolidated Statements of Comprehensive Income Sheet http://www.washreit.com/role/ConsolidatedStatementsOfComprehensiveIncome Consolidated Statements of Comprehensive Income Statements 5 false false R6.htm 1004000 - Statement - Consolidated Statements of Equity Sheet http://www.washreit.com/role/ConsolidatedStatementsOfEquity Consolidated Statements of Equity Statements 6 false false R7.htm 1005000 - Statement - Consolidated Statements of Cash Flows Sheet http://www.washreit.com/role/ConsolidatedStatementsOfCashFlows Consolidated Statements of Cash Flows Statements 7 false false R8.htm 2101100 - Disclosure - Nature of Business Sheet http://www.washreit.com/role/NatureOfBusiness Nature of Business Notes 8 false false R9.htm 2102100 - Disclosure - Summary of Significant Accounting Policies and Basis of Presentation Sheet http://www.washreit.com/role/SummaryOfSignificantAccountingPoliciesAndBasisOfPresentation Summary of Significant Accounting Policies and Basis of Presentation Notes 9 false false R10.htm 2103100 - Disclosure - Real Estate Sheet http://www.washreit.com/role/RealEstate Real Estate Notes 10 false false R11.htm 2104100 - Disclosure - Lease Accounting Sheet http://www.washreit.com/role/LeaseAccounting Lease Accounting Notes 11 false false R12.htm 2105100 - Disclosure - Mortgage Note Payable Sheet http://www.washreit.com/role/MortgageNotePayable Mortgage Note Payable Notes 12 false false R13.htm 2106100 - Disclosure - Unsecured Lines of Credit Payable Sheet http://www.washreit.com/role/UnsecuredLinesOfCreditPayable Unsecured Lines of Credit Payable Notes 13 false false R14.htm 2107100 - Disclosure - Notes Payable Notes http://www.washreit.com/role/NotesPayable Notes Payable Notes 14 false false R15.htm 2108100 - Disclosure - Derivative Instruments Sheet http://www.washreit.com/role/DerivativeInstruments Derivative Instruments Notes 15 false false R16.htm 2109100 - Disclosure - Fair Value Disclosures Sheet http://www.washreit.com/role/FairValueDisclosures Fair Value Disclosures Notes 16 false false R17.htm 2110100 - Disclosure - Stock Based Compensation Sheet http://www.washreit.com/role/StockBasedCompensation Stock Based Compensation Notes 17 false false R18.htm 2111100 - Disclosure - Other Benefit Plans Sheet http://www.washreit.com/role/OtherBenefitPlans Other Benefit Plans Notes 18 false false R19.htm 2112100 - Disclosure - Earnings Per Common Share Sheet http://www.washreit.com/role/EarningsPerCommonShare Earnings Per Common Share Notes 19 false false R20.htm 2113100 - Disclosure - Commitments and Contingencies Sheet http://www.washreit.com/role/CommitmentsAndContingencies Commitments and Contingencies Notes 20 false false R21.htm 2114100 - Disclosure - Segment Information Sheet http://www.washreit.com/role/SegmentInformation Segment Information Notes 21 false false R22.htm 2115100 - Disclosure - Selected Quarterly Financial Data (Unaudited) Sheet http://www.washreit.com/role/SelectedQuarterlyFinancialDataUnaudited Selected Quarterly Financial Data (Unaudited) Notes 22 false false R23.htm 2116100 - Disclosure - Shareholders' Equity Sheet http://www.washreit.com/role/ShareholdersEquity Shareholders' Equity Notes 23 false false R24.htm 2117100 - Disclosure - Deferred Costs Sheet http://www.washreit.com/role/DeferredCosts Deferred Costs Notes 24 false false R25.htm 2118100 - Schedule - Schedule II Valuation and Qualifying Accounts Sheet http://www.washreit.com/role/ScheduleIiValuationAndQualifyingAccounts Schedule II Valuation and Qualifying Accounts Uncategorized 25 false false R26.htm 2119100 - Schedule - Schedule III Real Estate and Accumulated Depreciation Sheet http://www.washreit.com/role/ScheduleIiiRealEstateAndAccumulatedDepreciation Schedule III Real Estate and Accumulated Depreciation Cover 26 false false R27.htm 2202201 - Disclosure - Summary of Significant Accounting Policies and Basis of Presentation (Policies) Sheet http://www.washreit.com/role/SummaryOfSignificantAccountingPoliciesAndBasisOfPresentationPolicies Summary of Significant Accounting Policies and Basis of Presentation (Policies) Notes 27 false false R28.htm 2301301 - Disclosure - Nature of Business (Tables) Sheet http://www.washreit.com/role/NatureOfBusinessTables Nature of Business (Tables) Tables http://www.washreit.com/role/NatureOfBusiness 28 false false R29.htm 2302302 - Disclosure - Summary of Significant Accounting Policies and Basis of Presentation (Tables) Sheet http://www.washreit.com/role/SummaryOfSignificantAccountingPoliciesAndBasisOfPresentationTables Summary of Significant Accounting Policies and Basis of Presentation (Tables) Tables http://www.washreit.com/role/SummaryOfSignificantAccountingPoliciesAndBasisOfPresentation 29 false false R30.htm 2303301 - Disclosure - Real Estate (Tables) Sheet http://www.washreit.com/role/RealEstateTables Real Estate (Tables) Tables http://www.washreit.com/role/RealEstate 30 false false R31.htm 2304301 - Disclosure - Lease Accounting (Tables) Sheet http://www.washreit.com/role/LeaseAccountingTables Lease Accounting (Tables) Tables http://www.washreit.com/role/LeaseAccounting 31 false false R32.htm 2305301 - Disclosure - Mortgage Note Payable (Tables) Sheet http://www.washreit.com/role/MortgageNotePayableTables Mortgage Note Payable (Tables) Tables http://www.washreit.com/role/MortgageNotePayable 32 false false R33.htm 2306301 - Disclosure - Unsecured Lines of Credit Payable (Tables) Sheet http://www.washreit.com/role/UnsecuredLinesOfCreditPayableTables Unsecured Lines of Credit Payable (Tables) Tables http://www.washreit.com/role/UnsecuredLinesOfCreditPayable 33 false false R34.htm 2307301 - Disclosure - Notes Payable (Tables) Notes http://www.washreit.com/role/NotesPayableTables Notes Payable (Tables) Tables http://www.washreit.com/role/NotesPayable 34 false false R35.htm 2308301 - Disclosure - Derivative Instruments (Tables) Sheet http://www.washreit.com/role/DerivativeInstrumentsTables Derivative Instruments (Tables) Tables http://www.washreit.com/role/DerivativeInstruments 35 false false R36.htm 2309301 - Disclosure - Fair Value Disclosures (Tables) Sheet http://www.washreit.com/role/FairValueDisclosuresTables Fair Value Disclosures (Tables) Tables http://www.washreit.com/role/FairValueDisclosures 36 false false R37.htm 2310301 - Disclosure - Stock Based Compensation (Tables) Sheet http://www.washreit.com/role/StockBasedCompensationTables Stock Based Compensation (Tables) Tables http://www.washreit.com/role/StockBasedCompensation 37 false false R38.htm 2312301 - Disclosure - Earnings Per Common Share (Tables) Sheet http://www.washreit.com/role/EarningsPerCommonShareTables Earnings Per Common Share (Tables) Tables http://www.washreit.com/role/EarningsPerCommonShare 38 false false R39.htm 2314301 - Disclosure - Segment Information (Tables) Sheet http://www.washreit.com/role/SegmentInformationTables Segment Information (Tables) Tables http://www.washreit.com/role/SegmentInformation 39 false false R40.htm 2315301 - Disclosure - Selected Quarterly Financial Data (Unaudited) (Tables) Sheet http://www.washreit.com/role/SelectedQuarterlyFinancialDataUnauditedTables Selected Quarterly Financial Data (Unaudited) (Tables) Tables http://www.washreit.com/role/SelectedQuarterlyFinancialDataUnaudited 40 false false R41.htm 2316301 - Disclosure - Shareholders' Equity (Tables) Sheet http://www.washreit.com/role/ShareholdersEquityTables Shareholders' Equity (Tables) Tables http://www.washreit.com/role/ShareholdersEquity 41 false false R42.htm 2317301 - Disclosure - Deferred Costs (Tables) Sheet http://www.washreit.com/role/DeferredCostsTables Deferred Costs (Tables) Tables http://www.washreit.com/role/DeferredCosts 42 false false R43.htm 2401402 - Disclosure - Nature of Business - Narrative (Details) Sheet http://www.washreit.com/role/NatureOfBusinessNarrativeDetails Nature of Business - Narrative (Details) Details 43 false false R44.htm 2401403 - Disclosure - Nature of Business - Properties Sold (Details) Sheet http://www.washreit.com/role/NatureOfBusinessPropertiesSoldDetails Nature of Business - Properties Sold (Details) Details 44 false false R45.htm 2401404 - Disclosure - Nature of Business - Taxable Percentage of Dividends (Details) Sheet http://www.washreit.com/role/NatureOfBusinessTaxablePercentageOfDividendsDetails Nature of Business - Taxable Percentage of Dividends (Details) Details 45 false false R46.htm 2402403 - Disclosure - Summary of Significant Accounting Policies and Basis of Presentation - Revenue Recognition and Rents and Other Receivables (Details) Sheet http://www.washreit.com/role/SummaryOfSignificantAccountingPoliciesAndBasisOfPresentationRevenueRecognitionAndRentsAndOtherReceivablesDetails Summary of Significant Accounting Policies and Basis of Presentation - Revenue Recognition and Rents and Other Receivables (Details) Details 46 false false R47.htm 2402404 - Disclosure - Summary of Significant Accounting Policies and Basis of Presentation - Real Estate and Depreciation (Details) Sheet http://www.washreit.com/role/SummaryOfSignificantAccountingPoliciesAndBasisOfPresentationRealEstateAndDepreciationDetails Summary of Significant Accounting Policies and Basis of Presentation - Real Estate and Depreciation (Details) Details 47 false false R48.htm 2403402 - Disclosure - Real Estate - Real Estate Investment Portfolio (Details) Sheet http://www.washreit.com/role/RealEstateRealEstateInvestmentPortfolioDetails Real Estate - Real Estate Investment Portfolio (Details) Details 48 false false R49.htm 2403403 - Disclosure - Real Estate - Acquisitions (Details) Sheet http://www.washreit.com/role/RealEstateAcquisitionsDetails Real Estate - Acquisitions (Details) Details 49 false false R50.htm 2403404 - Disclosure - Real Estate - Revenue and Income (Loss) for Acquired Properties (Details) Sheet http://www.washreit.com/role/RealEstateRevenueAndIncomeLossForAcquiredPropertiesDetails Real Estate - Revenue and Income (Loss) for Acquired Properties (Details) Details 50 false false R51.htm 2403405 - Disclosure - Real Estate - Cost Allocation of Asset Acquisitions (Details) Sheet http://www.washreit.com/role/RealEstateCostAllocationOfAssetAcquisitionsDetails Real Estate - Cost Allocation of Asset Acquisitions (Details) Details 51 false false R52.htm 2403406 - Disclosure - Real Estate - Portfolio and Acquisitions Narrative (Details) Sheet http://www.washreit.com/role/RealEstatePortfolioAndAcquisitionsNarrativeDetails Real Estate - Portfolio and Acquisitions Narrative (Details) Details 52 false false R53.htm 2403407 - Disclosure - Real Estate - Net Balances of Components of Fair Value of In-Place Leases (Details) Sheet http://www.washreit.com/role/RealEstateNetBalancesOfComponentsOfFairValueOfInPlaceLeasesDetails Real Estate - Net Balances of Components of Fair Value of In-Place Leases (Details) Details 53 false false R54.htm 2403408 - Disclosure - Real Estate - Amortization of Combined Components (Details) Sheet http://www.washreit.com/role/RealEstateAmortizationOfCombinedComponentsDetails Real Estate - Amortization of Combined Components (Details) Details 54 false false R55.htm 2403409 - Disclosure - Real Estate - Amortization of Combined Components Over Next Five Years (Details) Sheet http://www.washreit.com/role/RealEstateAmortizationOfCombinedComponentsOverNextFiveYearsDetails Real Estate - Amortization of Combined Components Over Next Five Years (Details) Details 55 false false R56.htm 2403410 - Disclosure - Real Estate - Properties Sold and Held for Sale (Details) Sheet http://www.washreit.com/role/RealEstatePropertiesSoldAndHeldForSaleDetails Real Estate - Properties Sold and Held for Sale (Details) Details 56 false false R57.htm 2403411 - Disclosure - Real Estate - Properties Sold and Held for Sale Narrative (Details) Sheet http://www.washreit.com/role/RealEstatePropertiesSoldAndHeldForSaleNarrativeDetails Real Estate - Properties Sold and Held for Sale Narrative (Details) Details 57 false false R58.htm 2403412 - Disclosure - Real Estate - Discontinued Operations Results of Retail Portfolio (Details) Sheet http://www.washreit.com/role/RealEstateDiscontinuedOperationsResultsOfRetailPortfolioDetails Real Estate - Discontinued Operations Results of Retail Portfolio (Details) Details 58 false false R59.htm 2403413 - Disclosure - Real Estate - Discontinued Operations Assets and Liabilities (Details) Sheet http://www.washreit.com/role/RealEstateDiscontinuedOperationsAssetsAndLiabilitiesDetails Real Estate - Discontinued Operations Assets and Liabilities (Details) Details 59 false false R60.htm 2404402 - Disclosure - Lease Accounting - Schedule of Future Minimum Rental Income (Details) Sheet http://www.washreit.com/role/LeaseAccountingScheduleOfFutureMinimumRentalIncomeDetails Lease Accounting - Schedule of Future Minimum Rental Income (Details) Details 60 false false R61.htm 2404403 - Disclosure - Lease Accounting - Leasing as a Lessor Narrative (Details) Sheet http://www.washreit.com/role/LeaseAccountingLeasingAsLessorNarrativeDetails Lease Accounting - Leasing as a Lessor Narrative (Details) Details 61 false false R62.htm 2404404 - Disclosure - Lease Accounting - Leasing as a Lessee Narrative (Details) Sheet http://www.washreit.com/role/LeaseAccountingLeasingAsLesseeNarrativeDetails Lease Accounting - Leasing as a Lessee Narrative (Details) Details 62 false false R63.htm 2404405 - Disclosure - Lease Accounting - Schedule of Obligations for Future Minimum Payments on Operating Ground Lease (Details) Sheet http://www.washreit.com/role/LeaseAccountingScheduleOfObligationsForFutureMinimumPaymentsOnOperatingGroundLeaseDetails Lease Accounting - Schedule of Obligations for Future Minimum Payments on Operating Ground Lease (Details) Details 63 false false R64.htm 2405402 - Disclosure - Mortgage Note Payable - Outstanding Mortgage Notes Payable (Details) Notes http://www.washreit.com/role/MortgageNotePayableOutstandingMortgageNotesPayableDetails Mortgage Note Payable - Outstanding Mortgage Notes Payable (Details) Details 64 false false R65.htm 2406402 - Disclosure - Unsecured Lines of Credit Payable - Narrative (Details) Sheet http://www.washreit.com/role/UnsecuredLinesOfCreditPayableNarrativeDetails Unsecured Lines of Credit Payable - Narrative (Details) Details 65 false false R66.htm 2406403 - Disclosure - Unsecured Lines of Credit Payable - Revolving Credit Facility Unused and Available Credit (Details) Sheet http://www.washreit.com/role/UnsecuredLinesOfCreditPayableRevolvingCreditFacilityUnusedAndAvailableCreditDetails Unsecured Lines of Credit Payable - Revolving Credit Facility Unused and Available Credit (Details) Details 66 false false R67.htm 2406404 - Disclosure - Unsecured Lines of Credit Payable - Revolving Credit Facility Borrowings and Repayments (Details) Sheet http://www.washreit.com/role/UnsecuredLinesOfCreditPayableRevolvingCreditFacilityBorrowingsAndRepaymentsDetails Unsecured Lines of Credit Payable - Revolving Credit Facility Borrowings and Repayments (Details) Details 67 false false R68.htm 2406405 - Disclosure - Unsecured Lines of Credit Payable - Recognized Interest Expense (Details) Sheet http://www.washreit.com/role/UnsecuredLinesOfCreditPayableRecognizedInterestExpenseDetails Unsecured Lines of Credit Payable - Recognized Interest Expense (Details) Details 68 false false R69.htm 2406406 - Disclosure - Unsecured Lines of Credit Payable - Information Related to Revolving Credit Facility (Details) Sheet http://www.washreit.com/role/UnsecuredLinesOfCreditPayableInformationRelatedToRevolvingCreditFacilityDetails Unsecured Lines of Credit Payable - Information Related to Revolving Credit Facility (Details) Details 69 false false R70.htm 2407402 - Disclosure - Notes Payable - Unsecured Notes and Term Loans Outstanding (Details) Notes http://www.washreit.com/role/NotesPayableUnsecuredNotesAndTermLoansOutstandingDetails Notes Payable - Unsecured Notes and Term Loans Outstanding (Details) Details 70 false false R71.htm 2407403 - Disclosure - Notes Payable - Narrative (Details) Notes http://www.washreit.com/role/NotesPayableNarrativeDetails Notes Payable - Narrative (Details) Details 71 false false R72.htm 2407404 - Disclosure - Notes Payable - Required Principal Payments on Unsecured Notes and Term Loans (Details) Notes http://www.washreit.com/role/NotesPayableRequiredPrincipalPaymentsOnUnsecuredNotesAndTermLoansDetails Notes Payable - Required Principal Payments on Unsecured Notes and Term Loans (Details) Details 72 false false R73.htm 2408402 - Disclosure - Derivative Instruments - Narrative (Details) Sheet http://www.washreit.com/role/DerivativeInstrumentsNarrativeDetails Derivative Instruments - Narrative (Details) Details 73 false false R74.htm 2408403 - Disclosure - Derivative Instruments - Fair Value of Interest Rate Swaps (Details) Sheet http://www.washreit.com/role/DerivativeInstrumentsFairValueOfInterestRateSwapsDetails Derivative Instruments - Fair Value of Interest Rate Swaps (Details) Details 74 false false R75.htm 2408404 - Disclosure - Derivative Instruments - Net Gains and Losses on Derivatives (Details) Sheet http://www.washreit.com/role/DerivativeInstrumentsNetGainsAndLossesOnDerivativesDetails Derivative Instruments - Net Gains and Losses on Derivatives (Details) Details 75 false false R76.htm 2409402 - Disclosure - Fair Value Disclosures - Assets and Liabilities Measured at Fair Value (Details) Sheet http://www.washreit.com/role/FairValueDisclosuresAssetsAndLiabilitiesMeasuredAtFairValueDetails Fair Value Disclosures - Assets and Liabilities Measured at Fair Value (Details) Details 76 false false R77.htm 2409403 - Disclosure - Fair Value Disclosures - Carrying Values and Estimated Fair Values of Financial Instruments (Details) Sheet http://www.washreit.com/role/FairValueDisclosuresCarryingValuesAndEstimatedFairValuesOfFinancialInstrumentsDetails Fair Value Disclosures - Carrying Values and Estimated Fair Values of Financial Instruments (Details) Details 77 false false R78.htm 2410402 - Disclosure - Stock Based Compensation - Narrative (Details) Sheet http://www.washreit.com/role/StockBasedCompensationNarrativeDetails Stock Based Compensation - Narrative (Details) Details 78 false false R79.htm 2410403 - Disclosure - Stock Based Compensation - Short-Term Incentive Plan and Long-Term Incentive Plan Narrative (Details) Sheet http://www.washreit.com/role/StockBasedCompensationShortTermIncentivePlanAndLongTermIncentivePlanNarrativeDetails Stock Based Compensation - Short-Term Incentive Plan and Long-Term Incentive Plan Narrative (Details) Details 79 false false R80.htm 2410404 - Disclosure - Stock Based Compensation - Assumptions for LTIP Awards (Details) Sheet http://www.washreit.com/role/StockBasedCompensationAssumptionsForLtipAwardsDetails Stock Based Compensation - Assumptions for LTIP Awards (Details) Details 80 false false R81.htm 2410405 - Disclosure - Stock Based Compensation - Trustee Awards and Total Compensation Expense Narrative (Details) Sheet http://www.washreit.com/role/StockBasedCompensationTrusteeAwardsAndTotalCompensationExpenseNarrativeDetails Stock Based Compensation - Trustee Awards and Total Compensation Expense Narrative (Details) Details 81 false false R82.htm 2410406 - Disclosure - Stock Based Compensation - Restricted Share Awards with Performance and Service Conditions (Details) Sheet http://www.washreit.com/role/StockBasedCompensationRestrictedShareAwardsWithPerformanceAndServiceConditionsDetails Stock Based Compensation - Restricted Share Awards with Performance and Service Conditions (Details) Details 82 false false R83.htm 2410407 - Disclosure - Stock Based Compensation - Restricted Share Awards with Performance and Service Conditions Narrative (Details) Sheet http://www.washreit.com/role/StockBasedCompensationRestrictedShareAwardsWithPerformanceAndServiceConditionsNarrativeDetails Stock Based Compensation - Restricted Share Awards with Performance and Service Conditions Narrative (Details) Details 83 false false R84.htm 2410408 - Disclosure - Stock Based Compensation - Restricted and Unrestricted Shares with Market Conditions (Details) Sheet http://www.washreit.com/role/StockBasedCompensationRestrictedAndUnrestrictedSharesWithMarketConditionsDetails Stock Based Compensation - Restricted and Unrestricted Shares with Market Conditions (Details) Details 84 false false R85.htm 2411401 - Disclosure - Other Benefit Plans - Narrative (Details) Sheet http://www.washreit.com/role/OtherBenefitPlansNarrativeDetails Other Benefit Plans - Narrative (Details) Details 85 false false R86.htm 2412402 - Disclosure - Earnings Per Common Share - Computation of Basic And Diluted Earnings Per Share (Details) Sheet http://www.washreit.com/role/EarningsPerCommonShareComputationOfBasicAndDilutedEarningsPerShareDetails Earnings Per Common Share - Computation of Basic And Diluted Earnings Per Share (Details) Details 86 false false R87.htm 2414402 - Disclosure - Segment Information - Segments (Details) Sheet http://www.washreit.com/role/SegmentInformationSegmentsDetails Segment Information - Segments (Details) Details 87 false false R88.htm 2414403 - Disclosure - Segment Information - Financial Information by Segment (Details) Sheet http://www.washreit.com/role/SegmentInformationFinancialInformationBySegmentDetails Segment Information - Financial Information by Segment (Details) Details 88 false false R89.htm 2415402 - Disclosure - Selected Quarterly Financial Data (Unaudited) (Details) Sheet http://www.washreit.com/role/SelectedQuarterlyFinancialDataUnauditedDetails Selected Quarterly Financial Data (Unaudited) (Details) Details http://www.washreit.com/role/SelectedQuarterlyFinancialDataUnauditedTables 89 false false R90.htm 2416402 - Disclosure - Shareholders' Equity - Narrative (Details) Sheet http://www.washreit.com/role/ShareholdersEquityNarrativeDetails Shareholders' Equity - Narrative (Details) Details 90 false false R91.htm 2416403 - Disclosure - Shareholders' Equity - Issuances and Net Proceeds on Equity Distribution Agreements (Details) Sheet http://www.washreit.com/role/ShareholdersEquityIssuancesAndNetProceedsOnEquityDistributionAgreementsDetails Shareholders' Equity - Issuances and Net Proceeds on Equity Distribution Agreements (Details) Details 91 false false R92.htm 2416404 - Disclosure - Shareholders' Equity - Dividend Reinvestment Program (Details) Sheet http://www.washreit.com/role/ShareholdersEquityDividendReinvestmentProgramDetails Shareholders' Equity - Dividend Reinvestment Program (Details) Details 92 false false R93.htm 2417402 - Disclosure - Deferred Costs - Deferred Lease Costs and Incentives in Prepaid Expenses and Other Assets (Details) Sheet http://www.washreit.com/role/DeferredCostsDeferredLeaseCostsAndIncentivesInPrepaidExpensesAndOtherAssetsDetails Deferred Costs - Deferred Lease Costs and Incentives in Prepaid Expenses and Other Assets (Details) Details 93 false false R94.htm 2417403 - Disclosure - Deferred Costs - Amortization and Write-Offs of Deferred Leasing Costs and Incentives (Details) Sheet http://www.washreit.com/role/DeferredCostsAmortizationAndWriteOffsOfDeferredLeasingCostsAndIncentivesDetails Deferred Costs - Amortization and Write-Offs of Deferred Leasing Costs and Incentives (Details) Details 94 false false R95.htm 2418401 - Schedule - Schedule II Valuation and Qualifying Accounts (Details) Sheet http://www.washreit.com/role/ScheduleIiValuationAndQualifyingAccountsDetails Schedule II Valuation and Qualifying Accounts (Details) Details 95 false false R96.htm 2419401 - Schedule - Schedule III Real Estate and Accumulated Depreciation - By Property (Details) Sheet http://www.washreit.com/role/ScheduleIiiRealEstateAndAccumulatedDepreciationByPropertyDetails Schedule III Real Estate and Accumulated Depreciation - By Property (Details) Details 96 false false R97.htm 2419402 - Schedule - Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Assets and Accumulated Depreciation (Details) Sheet http://www.washreit.com/role/ScheduleIiiRealEstateAndAccumulatedDepreciationReconciliationOfRealEstateAssetsAndAccumulatedDepreciationDetails Schedule III Real Estate and Accumulated Depreciation - Reconciliation of Real Estate Assets and Accumulated Depreciation (Details) Details 97 false false R9999.htm Uncategorized Items - wre10-kx12312019.htm Sheet http://xbrl.sec.gov/role/uncategorizedFacts Uncategorized Items - wre10-kx12312019.htm Cover 98 false false All Reports Book All Reports wre10-kx12312019.htm exhibit48-descriptiono.htm q42019exhibit1045-stip.htm q42019exhibit1046-ltip.htm q42019exhibit21-entiti.htm q42019exhibit23.htm q42019exhibit24-powero.htm q42019exhibit311.htm q42019exhibit312.htm q42019exhibit313.htm q42019exhibit32.htm wre-20191231.xsd wre-20191231_cal.xml wre-20191231_def.xml wre-20191231_lab.xml wre-20191231_pre.xml chart-7b8f9f036fff5a81a3f.jpg chart-f3a83df74d1b5a4bbf9.jpg http://fasb.org/srt/2019-01-31 http://xbrl.sec.gov/stpr/2018-01-31 http://xbrl.sec.gov/dei/2019-01-31 http://fasb.org/us-gaap/2019-01-31 true true