Incentive Plan Award, Bonuses Payable In Cash, Percentage

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Incentive Plan Award, Performance Based On Relative Total Shareholder Return To FTSE NAREIT Residential Index, Percentage

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Incentive Plan Award, Performance Based On Relative Total Shareholder Return To FTSE NAREIT Residential Index, Weighting, Percentage

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Incentive Plan Award, Performance Based On Relative Total Shareholder Return To Peer Companies, Grant Date Fair Value As Percentage Of Base Salary

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Incentive Plan Award, Performance Based On Relative Total Shareholder Return To Peer Companies, Percentage

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- Definition

Long-Term Incentive Plan, Aggregate Weighting Of Performance Measures And Time-Based Measures

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Long-Term Incentive Plan, Percentage of Performance-Based Award Vested Upon Grant

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- Definition

Restricted Share Award, Retirement Age

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Restricted Share Award, Retirement Age With Years Experience

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Restricted Share Award, Years Experience In Retirement Age Metric

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Share-Based Compensation Arrangement By Share-Based Payment Award, Percentage Of Award Vesting On Fifth Anniversary Of Grant

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Short-Term Incentive Plan, Aggregate Weighting Of Performance Measures And Time-Based Measures

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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The total fair value of shares issued during the period under a deferred compensation arrangement.

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Amount of cost capitalized for award under share-based payment arrangement.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of options outstanding, including both vested and non-vested options.

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SHARE-BASED COMPENSATION - Narrative (Details) $ in Millions		12 Months Ended
	May 30, 2024 shares	Dec. 31, 2024 USD ($) age shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	May 29, 2024 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense \| $		$ 5.2	$ 5.5	$ 8.0
Capitalized stock-based compensation expense \| $		0.1	0.1	0.2
Trustee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of share-based compensation for each trustee \| $		$ 0.1	$ 0.1	$ 0.1
Restricted share awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
One-time equity award granted (shares) \| shares		280,008	410,928	408,606
Retirement age with 20 years employment \| age		55
Years of employment for retirement age metric		20 years
Retirement age \| age		65
Fair value of restricted share units vested \| $		$ 4.1	$ 7.3	$ 11.1
Compensation costs not yet recognized \| $		$ 3.5
Recognition period for compensation expense		20 months
Restricted share awards \| Chief executive officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		5 years
One-time equity award granted (shares) \| shares		100,000
Percentage of equity award that vests on fifth anniversary of grant date		100.00%
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) \| shares	2,900,000
Aggregate number of shares authorized for stock based awards (in shares) \| shares	5,300,000				2,400,000
Incentive plan, period in effect (in years)	10 years
Options outstanding (in shares) \| shares		0	0
Officer STIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Short-term incentive plan, aggregate weighting of performance measures and time-based measures		100.00%
Officer LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate weighting of performance and time-based measures (percent)		100.00%
Long-term incentive plan, percentage of performance-based award vested upon grant		100.00%
Officer LTIP \| Time-based award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Officer LTIP \| Time-based award \| Share-Based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage per year over three-year vesting period (percent)		33.33%
Officer LTIP \| Time-based award \| Share-Based Payment Arrangement, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage per year over three-year vesting period (percent)		33.33%
Officer LTIP \| Time-based award \| Share-Based Payment Arrangement, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage per year over three-year vesting period (percent)		33.33%
Prior STIP \| Non-executive officer and staff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incentive plan bonuses payable in cash (percent)		100.00%
Prior LTIP \| Executive officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period (in years)		3 years	3 years	3 years
Performance evaluated on relative TSR to FTSE residential index		60.00%	60.00%
Performance evaluated on relative TSR to defined population of peer companies		40.00%	40.00%	100.00%
Performance evaluated on relative TSR to FTSE residential index weighting		40.00%	40.00%
Prior LTIP \| Executive officers \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value as a percentage of base salary for awards evaluated on relative TSR to defined population of peer companies		51.00%	27.00%
Grant date fair value as a percentage of base salary for awards evaluated on relative TSR to FTSE NAREIT diversified index		64.00%	32.00%
Grant date fair value as a percentage of base salary for awards evaluated on on relative TSR				32.00%
Prior LTIP \| Executive officers \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value as a percentage of base salary for awards evaluated on relative TSR to defined population of peer companies		155.00%	137.00%
Grant date fair value as a percentage of base salary for awards evaluated on relative TSR to FTSE NAREIT diversified index		195.00%	159.00%
Grant date fair value as a percentage of base salary for awards evaluated on on relative TSR				248.00%
LTIP for non-executive officers and staff
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Performance period (in years)		3 years