Annual report pursuant to Section 13 and 15(d)

Stock Based Compensation - Restricted and Unrestricted Shares with Market Conditions (Details)

v2.4.1.9
Stock Based Compensation - Restricted and Unrestricted Shares with Market Conditions (Details) (USD $)
In Thousands, unless otherwise specified
1 Months Ended 12 Months Ended
Feb. 28, 2011
Dec. 31, 2014
Relative TSR [Member] | Restricted Share Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted and Unrestricted Share Awards, Grant Date Fair Value $ 458wre_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue
/ us-gaap_AwardTypeAxis
= wre_RelativeTsrMember
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= wre_RestrictedShareAwardsMember
 
Unamortized Value Of Restricted and Unrestricted Shares   354wre_UnamortizedValueOfShares
/ us-gaap_AwardTypeAxis
= wre_RelativeTsrMember
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= wre_RestrictedShareAwardsMember
Relative TSR [Member] | Unrestricted Share Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted and Unrestricted Share Awards, Grant Date Fair Value 1,376wre_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue
/ us-gaap_AwardTypeAxis
= wre_RelativeTsrMember
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= wre_UnrestrictedShareAwardsMember
 
Unamortized Value Of Restricted and Unrestricted Shares   841wre_UnamortizedValueOfShares
/ us-gaap_AwardTypeAxis
= wre_RelativeTsrMember
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= wre_UnrestrictedShareAwardsMember
Absolute TSR [Member] | Restricted Share Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted and Unrestricted Share Awards, Grant Date Fair Value 327wre_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue
/ us-gaap_AwardTypeAxis
= wre_AbsoluteTsrMember
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= wre_RestrictedShareAwardsMember
 
Unamortized Value Of Restricted and Unrestricted Shares   251wre_UnamortizedValueOfShares
/ us-gaap_AwardTypeAxis
= wre_AbsoluteTsrMember
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= wre_RestrictedShareAwardsMember
Absolute TSR [Member] | Unrestricted Share Awards [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted and Unrestricted Share Awards, Grant Date Fair Value 921wre_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue
/ us-gaap_AwardTypeAxis
= wre_AbsoluteTsrMember
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= wre_UnrestrictedShareAwardsMember
 
Unamortized Value Of Restricted and Unrestricted Shares   $ 549wre_UnamortizedValueOfShares
/ us-gaap_AwardTypeAxis
= wre_AbsoluteTsrMember
/ us-gaap_DeferredCompensationArrangementWithIndividualShareBasedPaymentsByTypeOfDeferredCompensationAxis
= wre_UnrestrictedShareAwardsMember