Variable Interest Entities (Details) $ in Thousands	Mar. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($)
Variable Interest Entity [Line Items]
Assets	$ 5,835,020	$ 5,903,438
Liabilities	$ 2,638,202	2,708,016
JBG Smith, LP
Variable Interest Entity [Line Items]
Ownership interest by parent	88.50%
Unconsolidated VIEs
Variable Interest Entity [Line Items]
Equity Method Investments	$ 85,300	83,200
Consolidated VIEs
Variable Interest Entity [Line Items]
Number of consolidated variable interest entities | item	2
Assets	$ 326,000	265,500
Liabilities	$ 158,200	$ 116,300