Redeemable Noncontrolling Interests - Summary of the Activity of Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Temporary Equity
Balance, beginning of period	$ 455,886	$ 521,392	$ 481,310	$ 522,725
Redemptions	(7,602)	(4,891)	(33,757)	(12,667)
LTIP Units issued in lieu of cash compensation			5,213	6,584
Net income (loss)	(7,926)	(2,546)	(5,961)	15,712
Other comprehensive income	1,346	4,376	902	8,653
Distributions	(3,727)	(4,202)	(7,654)	(8,460)
Share-based compensation expense	6,003	6,211	25,152	31,107
Adjustment to redemption value	381	(28,861)	(20,844)	(72,175)
Balance, end of period	444,361	491,479	444,361	491,479
JBG Smith, LP
Temporary Equity
Balance, beginning of period	455,886	513,426	480,663	513,268
Redemptions	(7,602)	(4,891)	(33,110)	(12,667)
LTIP Units issued in lieu of cash compensation			5,213	6,584
Net income (loss)	(7,926)	(2,557)	(5,961)	15,680
Other comprehensive income	1,346	4,376	902	8,653
Distributions	(3,727)	(4,083)	(7,654)	(8,193)
Share-based compensation expense	6,003	6,211	25,152	31,107
Adjustment to redemption value	381	(30,681)	(20,844)	(72,631)
Balance, end of period	$ 444,361	481,801	444,361	481,801
Consolidated Real Estate Venture
Temporary Equity
Balance, beginning of period		7,966	647	9,457
Redemptions			$ (647)
Net income (loss)		11		32
Distributions		(119)		(267)
Adjustment to redemption value		1,820		456
Balance, end of period		$ 9,678		$ 9,678