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Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The number of units in a real estate property owned as of the balance sheet date.

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The cash outflow associated with the purchase of real estate held-for-investment and real estate joint ventures.

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The carrying amount of investments in unconsolidated real estate and other joint ventures not separately presented. This includes direct and indirect investments.

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Investments in Unconsolidated Real Estate Ventures - Summary of Composition of Investments (Details) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2026 USD ($) item	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2025 USD ($)	Dec. 31, 2025 USD ($)
Investments in Unconsolidated Real Estate Ventures
Total investments in unconsolidated real estate ventures		$ 115,603		$ 115,603		$ 105,711
Payments for investments in unconsolidated real estate ventures				4,096	$ 3,426
Difference between the investments in unconsolidated real estate ventures and the net book value of the underlying assets		$ 2,200		$ 2,200		2,000
J.P. Morgan Global Alternatives ("J.P. Morgan")
Investments in Unconsolidated Real Estate Ventures
Effective Ownership Interest (as percent)		50.00%		50.00%
Total investments in unconsolidated real estate ventures		$ 72,310		$ 72,310		71,550
Dulles View Venture
Investments in Unconsolidated Real Estate Ventures
Effective Ownership Interest (as percent)		60.00%		60.00%
Total investments in unconsolidated real estate ventures		$ 18,591		$ 18,591		18,536
2200 Crystal Drive Venture
Investments in Unconsolidated Real Estate Ventures
Effective Ownership Interest (as percent)		30.00%		30.00%
Total investments in unconsolidated real estate ventures		$ 10,534		$ 10,534
Number of units in real estate property \| item	195
Payments for investments in unconsolidated real estate ventures	$ 10,700
Ownership interest before funding is complete (as a percent)	100.00%			77.20%
Ownership interest after funding is completed (as a percent)	30.00%
2200 Crystal Drive Venture \| Mortgage loan
Investments in Unconsolidated Real Estate Ventures
Term of loan	4 years
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) [Member]
Basis spread on variable rate (in percent)	2.00%
Draws on mortgage loan				$ 0
2200 Crystal Drive Venture \| 2200 Crystal Drive Partner
Investments in Unconsolidated Real Estate Ventures
Contribution commitment	$ 25,000
Ownership interest after funding is completed (as a percent)	70.00%
2200 Crystal Drive Venture \| Maximum \| Mortgage loan
Investments in Unconsolidated Real Estate Ventures
Principal amount	$ 55,000
4747 Bethesda Venture
Investments in Unconsolidated Real Estate Ventures
Effective Ownership Interest (as percent)		20.00%		20.00%
Total investments in unconsolidated real estate ventures		$ 7,035		$ 7,035		8,085
Brandywine Realty Trust
Investments in Unconsolidated Real Estate Ventures
Effective Ownership Interest (as percent)		30.00%		30.00%
Total investments in unconsolidated real estate ventures		$ 6,990		$ 6,990		6,968
Other
Investments in Unconsolidated Real Estate Ventures
Total investments in unconsolidated real estate ventures		143		143		$ 572
Investments in unconsolidated real estate ventures \| Property management
Investments in Unconsolidated Real Estate Ventures
Property management fee revenue		$ 2,900	$ 2,700	$ 5,600	$ 5,600