Annual report pursuant to Section 13 and 15(d)

Other Benefit Plans (Details)

v2.4.1.9
Other Benefit Plans (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
401I(k) plan contributions by employer $ 423,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount $ 428,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount $ 467,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Deferred Compensation Liability 1,556,000us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent 1,437,000us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent  
Officer SERP current service cost 306,000wre_CurrentServiceCostCurrentExecutives 325,000wre_CurrentServiceCostCurrentExecutives 342,000wre_CurrentServiceCostCurrentExecutives
Officer [Member]      
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]      
Accrued benefit liability $ 2,800,000us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
/ us-gaap_TitleOfIndividualAxis
= us-gaap_OfficerMember
$ 3,300,000us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability
/ us-gaap_TitleOfIndividualAxis
= us-gaap_OfficerMember