Variable Interest Entities (Details) $ in Thousands	Mar. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($) item
Variable Interest Entities
Assets	$ 5,405,350	$ 5,518,515
Liabilities	$ 2,796,472	2,825,929
JBG Smith, LP
Variable Interest Entities
Ownership interest by parent	87.60%
Unconsolidated VIEs
Variable Interest Entities
Equity Method Investments	$ 88,100	$ 87,300
Consolidated VIEs
Variable Interest Entities
Number of consolidated variable interest entities | item	2	2
Assets	$ 543,100	$ 503,200
Liabilities	$ 339,000	$ 293,300