The gross valuation amount of assets sold.

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Mortgage assumed by real estate venture due to sale of interests.

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Percentage of ownership interest in assets sold.

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Percentage of subordinated interest held through an unconsolidated real estate venture.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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No definition available.

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The charge against earnings in the period to reduce the carrying amount of real property to fair value.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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The number of real estate properties owned as of the balance sheet date.

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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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Investments in Unconsolidated Real Estate Ventures - Summary of Composition of Investments (Details) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) property building	Sep. 30, 2023 USD ($) property building	Dec. 31, 2022 USD ($)
Schedule of Equity Method Investments
Total investments in unconsolidated real estate ventures		$ 296,397	$ 296,397	$ 299,881
Difference between the investments in unconsolidated real estate ventures and the net book value of the underlying assets		$ 6,900	$ 6,900	8,900
Number of Real Estate Properties \| property		48	48
One Commercial Building
Schedule of Equity Method Investments
Subordinated interest		10.00%	10.00%
Number of Real Estate Properties \| building		1	1
Disposal Group, Disposed of by Sale \| 4747 Bethesda Avenue
Schedule of Equity Method Investments
Percentage of ownership interest in assets sold	80.00%		80.00%
Gross sales price	$ 196,000	$ 196,000	$ 196,000
Gross valuation of assets sold	245,000		$ 245,000
Prudential Global Investment Management (PGIM)
Schedule of Equity Method Investments
Ownership interest (as percent)		50.00%	50.00%
Total investments in unconsolidated real estate ventures		$ 196,389	$ 196,389	203,529
J.P. Morgan Global Alternatives ("J.P. Morgan")
Schedule of Equity Method Investments
Ownership interest (as percent)		50.00%	50.00%
Total investments in unconsolidated real estate ventures		$ 69,860	$ 69,860	64,803
4747 Bethesda Avenue
Schedule of Equity Method Investments
Ownership interest (as percent)		20.00%	20.00%
Total investments in unconsolidated real estate ventures		$ 13,349	$ 13,349
4747 Bethesda Avenue \| 4747 Bethesda Avenue
Schedule of Equity Method Investments
Mortgage assumed by real estate venture due to sale of interests	$ 175,000
Brandywine Realty Trust
Schedule of Equity Method Investments
Ownership interest (as percent)		30.00%	30.00%
Total investments in unconsolidated real estate ventures		$ 13,756	$ 13,756	13,678
CBREI Venture
Schedule of Equity Method Investments
Ownership interest (as percent)		9.90%	9.90%
Total investments in unconsolidated real estate ventures		$ 464	$ 464	12,516
CBREI Venture \| Washington, D.C. \| Loss from unconsolidated real estate ventures, net
Schedule of Equity Method Investments
Impairment of real estate		$ 3,300
Landmark
Schedule of Equity Method Investments
Ownership interest (as percent)		18.00%	18.00%
Total investments in unconsolidated real estate ventures		$ 1,992	$ 1,992	4,809
Other Investment
Schedule of Equity Method Investments
Total investments in unconsolidated real estate ventures		587	587	546
L'Enfant Plaza Assets
Schedule of Equity Method Investments
Total investments in unconsolidated real estate ventures		0	0	0
Certain Ventures
Schedule of Equity Method Investments
Total investments in unconsolidated real estate ventures		0	0	0
1101 17th Street \| Canadian Pension Plan Investment Board (CPPIB)
Schedule of Equity Method Investments
Total investments in unconsolidated real estate ventures		$ 0	$ 0	$ 0