Quarterly report pursuant to Section 13 or 15(d)

Cover Page

Cover Page - shares
6 Months Ended
Jun. 30, 2020
Jul. 27, 2020
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2020  
Document Transition Report false  
Entity File Number 1-6622  
Entity Central Index Key 0000104894  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 53-0261100  
Entity Address, Address Line One 1775 EYE STREET, NW  
Entity Address, Address Line Two SUITE 1000  
Entity Address, City or Town WASHINGTON  
Entity Address, State or Province DC  
Entity Address, Postal Zip Code 20006  
City Area Code 202  
Local Phone Number 774-3200  
Title of 12(b) Security Shares of Beneficial Interest  
Trading Symbol WRE  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   82,346,724