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SHARE-BASED COMPENSATION (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
	May 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	May 29, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation expense		$ 1.7	$ 1.6	$ 4.8	$ 3.7
Restricted Share Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share awards vested				$ 1.2	$ 1.0
Total unvested restricted share awards (in shares)		461,080		461,080
Weighted average grant date fair value (in dollars per share)		$ 15.82		$ 15.82
Compensation costs not yet recognized		$ 3.9		$ 3.9
Recognition period for compensation expense (in months)				19 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