Real Estate - Schedule of Operations from Acquired Properties (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2021
Real Estate [Abstract]
Real estate rental revenue	$ 488	$ 488
Net loss	$ (349)	$ (349)

Asset Acquisition, Earnings Or Loss Of Acquiree Since Acquisition Date, Actual

No definition available.

Name:	wre_AssetAcquisitionEarningsOrLossOfAcquireeSinceAcquisitionDateActual
Namespace Prefix:	wre_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration