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SHARE-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Apr. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 1.0	$ 1.4	$ 2.1	$ 2.6
Restricted Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share awards vested				$ 0.9	$ 4.0
Total unvested restricted share awards (in shares)		436,834		436,834
Weighted average grant date fair value (in dollars per share)		$ 16.96		$ 16.96
Compensation costs not yet recognized		$ 5.2		$ 5.2
Recognition period for compensation expense				24 months
Washington Real Estate Investment Trust 2016 Omnibus Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares additional authorized for stock based awards (in shares)	2,900,000
Aggregate number of shares authorized for stock based awards (in shares)	5,300,000					2,400,000
Incentive plan, period in effect (in years)	10 years

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