Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

v2.4.1.9
Segment Information (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
segment
Mar. 31, 2014
Dec. 31, 2014
Segment Reporting Information [Line Items]      
Number of reportable segments 3us-gaap_NumberOfReportableSegments    
Real estate rental revenue $ 74,856us-gaap_RealEstateRevenueNet $ 68,611us-gaap_RealEstateRevenueNet  
Real estate expenses 29,208us-gaap_CostOfRealEstateRevenue 26,342us-gaap_CostOfRealEstateRevenue  
Operating Income Loss Net 45,648wre_OperatingIncomeLossNet 42,269wre_OperatingIncomeLossNet  
Depreciation and amortization (25,275)us-gaap_DepreciationAndAmortization (22,753)us-gaap_DepreciationAndAmortization  
General and administrative (6,080)us-gaap_GeneralAndAdministrativeExpense (4,429)us-gaap_GeneralAndAdministrativeExpense  
Acquisition costs (16)us-gaap_BusinessCombinationAcquisitionRelatedCosts (3,045)us-gaap_BusinessCombinationAcquisitionRelatedCosts  
Interest expense (15,348)us-gaap_InterestExpense (14,530)us-gaap_InterestExpense  
Other income 192us-gaap_OtherNonoperatingIncomeExpense 223us-gaap_OtherNonoperatingIncomeExpense  
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal 30,277us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal 0us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal  
Income from operations of properties sold or held for sale 0us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax 546us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax  
Gain on sale of real estate 0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax 106,273us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax  
Net income 29,398us-gaap_ProfitLoss 104,554us-gaap_ProfitLoss  
Less: Net income attributable to noncontrolling interests in subsidiaries 108us-gaap_NetIncomeLossAttributableToNoncontrollingInterest 0us-gaap_NetIncomeLossAttributableToNoncontrollingInterest  
Net income attributable to the controlling interests 29,506us-gaap_NetIncomeLoss 104,554us-gaap_NetIncomeLoss  
Capital expenditures 6,157wre_CapitalExpenditures 10,386wre_CapitalExpenditures  
Total assets 2,123,234us-gaap_Assets 2,075,172us-gaap_Assets 2,113,707us-gaap_Assets
Office [Member]      
Segment Reporting Information [Line Items]      
Real estate rental revenue 42,495us-gaap_RealEstateRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
39,064us-gaap_RealEstateRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
 
Real estate expenses 17,143us-gaap_CostOfRealEstateRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
15,696us-gaap_CostOfRealEstateRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
 
Operating Income Loss Net 25,352wre_OperatingIncomeLossNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
23,368wre_OperatingIncomeLossNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
 
Capital expenditures 2,518wre_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
8,703wre_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
 
Total assets 1,279,406us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
1,151,585us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= wre_OfficeMember
 
Retail [Member]      
Segment Reporting Information [Line Items]      
Real estate rental revenue 16,330us-gaap_RealEstateRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
14,625us-gaap_RealEstateRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
 
Real estate expenses 4,787us-gaap_CostOfRealEstateRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
4,231us-gaap_CostOfRealEstateRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
 
Operating Income Loss Net 11,543wre_OperatingIncomeLossNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
10,394wre_OperatingIncomeLossNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
 
Capital expenditures 850wre_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
110wre_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
 
Total assets 383,511us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
341,134us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= wre_RetailMember
 
Multifamily [Member]      
Segment Reporting Information [Line Items]      
Real estate rental revenue 16,031us-gaap_RealEstateRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
14,922us-gaap_RealEstateRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
 
Real estate expenses 7,278us-gaap_CostOfRealEstateRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
6,415us-gaap_CostOfRealEstateRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
 
Operating Income Loss Net 8,753wre_OperatingIncomeLossNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
8,507wre_OperatingIncomeLossNet
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
 
Capital expenditures 1,413wre_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
1,556wre_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
 
Total assets 407,639us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
392,531us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= wre_MultifamilyMember
 
Corporate and Other [Member]      
Segment Reporting Information [Line Items]      
Real estate rental revenue 0us-gaap_RealEstateRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
0us-gaap_RealEstateRevenueNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
 
Real estate expenses 0us-gaap_CostOfRealEstateRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
0us-gaap_CostOfRealEstateRevenue
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
 
Operating Income Loss Net 0wre_OperatingIncomeLossNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
0wre_OperatingIncomeLossNet
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
 
Capital expenditures 1,376wre_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
17wre_CapitalExpenditures
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
 
Total assets $ 52,678us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember
$ 189,922us-gaap_Assets
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_CorporateAndOtherMember