Quarterly report pursuant to Section 13 or 15(d)

Unsecured Lines of Credit Payable - Schedule of Credit Unused and Available (Details)

v2.4.1.9
Unsecured Lines of Credit Payable - Schedule of Credit Unused and Available (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Line of Credit Facility [Line Items]    
Borrowings outstanding $ (30,000)us-gaap_LineOfCredit $ (50,000)us-gaap_LineOfCredit
Line of Credit | Credit Facility No. 1    
Line of Credit Facility [Line Items]    
Committed capacity 100,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo1Member
 
Borrowings outstanding 0us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo1Member
(5,000)us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo1Member
Letters of credit issued (1) 0wre_LinesOfCreditLettersOfCreditIssued
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo1Member
 
Unused and available 100,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo1Member
 
Line of Credit | Credit Facility No. 2    
Line of Credit Facility [Line Items]    
Committed capacity 400,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo2Member
 
Borrowings outstanding (30,000)us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo2Member
(45,000)us-gaap_LineOfCredit
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo2Member
Letters of credit issued (1) 15,474wre_LinesOfCreditLettersOfCreditIssued
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo2Member
 
Unused and available $ 354,526us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
/ us-gaap_CreditFacilityAxis
= us-gaap_LineOfCreditMember
/ us-gaap_LineOfCreditFacilityAxis
= wre_CreditFacilityNo2Member