Quarterly report pursuant to Section 13 or 15(d)

Nature of Business (Details)

v2.4.1.9
Nature of Business (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Percentage of distribution of ordinary taxable income 90.00%wre_PercentageOfDistributionOfOrdinaryTaxableIncome
Taxable Reit Subsidiary [Member]  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Deferred Tax Assets, Net of Valuation Allowance 0us-gaap_DeferredTaxAssetsNet
/ us-gaap_NatureOfExpenseAxis
= wre_TaxableReitSubsidiaryMember
Deferred Tax Liabilities, Net 0.6us-gaap_DeferredTaxLiabilities
/ us-gaap_NatureOfExpenseAxis
= wre_TaxableReitSubsidiaryMember