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Variable Interest Entities (Details) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2024 USD ($) item	Jun. 30, 2024 USD ($) item	Jun. 30, 2024 USD ($) item	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) item	Mar. 31, 2021 item
Variable Interest Entities
Payments for redemption of interest	$ 26,600		$ 26,569	$ 647
Purchase of interests	4,700	$ 26,586	26,586
Assets	5,325,116	5,325,116	5,325,116		$ 5,518,515
Liabilities	$ 2,853,861	$ 2,853,861	$ 2,853,861		2,825,929
1900 Crystal Drive.
Variable Interest Entities
Number of Towers in Real Estate Property | item						2
JBG Smith, LP
Variable Interest Entities
Ownership interest by parent	86.40%	86.40%	86.40%
Unconsolidated VIEs
Variable Interest Entities
Equity Method Investments	$ 88,400	$ 88,400	$ 88,400		$ 87,300
Consolidated VIEs
Variable Interest Entities
Number of consolidated variable interest entities | item	1	1	1		2
Assets	$ 256,100	$ 256,100	$ 256,100		$ 503,200
Liabilities	$ 157,900	$ 157,900	$ 157,900		$ 293,300

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