Redeemable Noncontrolling Interests - Summary of the Activity of Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Temporary Equity
Balance, beginning of period		$ 455,886	$ 440,737	$ 481,310
Redemptions		(7,602)		(33,757)
LTIP Units issued in lieu of cash compensation				5,213
Net loss		(7,926)		(5,961)
Other comprehensive income (loss)		1,346		902
Distributions		(3,727)		(7,654)
Share-based compensation expense		6,003		25,152
Adjustment to redemption value		381		(20,844)
Balance, end of period	$ 444,945	444,361	444,945	444,361
JBG Smith, LP
Temporary Equity
Balance, beginning of period	436,673	455,886	440,737	480,663
Redemptions	(3,553)	(7,602)	(13,769)	(33,110)
LTIP Units issued in lieu of cash compensation			3,836	5,213
Net loss	(4,365)	(7,926)	(12,353)	(5,961)
Other comprehensive income (loss)	(5,595)	1,346	(4,003)	902
Distributions	(2,874)	(3,727)	(8,714)	(7,654)
Share-based compensation expense	4,424	6,003	24,287	25,152
Adjustment to redemption value	20,235	381	14,924	(20,844)
Balance, end of period	$ 444,945	$ 444,361	$ 444,945	444,361
Consolidated Real Estate Venture
Temporary Equity
Balance, beginning of period				647
Redemptions				$ (647)