Redeemable Noncontrolling Interests - Summary of the Activity of Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Temporary Equity
Balance as of the beginning of the period	$ 521,392	$ 544,639	$ 522,725	$ 530,748
OP Unit redemptions	(4,891)	(5,670)	(12,667)	(27,350)
LTIP Units issued in lieu of cash bonuses (1)			6,584	5,614
Net income (loss)	(2,546)	103	15,712	(2,472)
Other comprehensive income	4,376	413	8,653	1,621
Distributions	(4,202)	(3,993)	(8,460)	(9,282)
Share-based compensation expense	6,211	10,695	31,107	36,066
Adjustment to redemption value	(28,861)	(19,274)	(72,175)	(8,032)
Balance as of the end of the period	491,479	526,913	491,479	526,913
JBG Smith, LP
Temporary Equity
Balance as of the beginning of the period	513,426	536,171	513,268	522,882
OP Unit redemptions	(4,891)	(5,670)	(12,667)	(27,350)
LTIP Units issued in lieu of cash bonuses (1)			6,584	5,614
Net income (loss)	(2,557)	116	15,680	(2,400)
Other comprehensive income	4,376	413	8,653	1,621
Distributions	(4,083)	(3,993)	(8,193)	(9,282)
Share-based compensation expense	6,211	10,695	31,107	36,066
Adjustment to redemption value	(30,681)	(20,748)	(72,631)	(10,167)
Balance as of the end of the period	481,801	516,984	481,801	516,984
Consolidated Real Estate Venture
Temporary Equity
Balance as of the beginning of the period	7,966	8,468	9,457	7,866
Net income (loss)	11	(13)	32	(72)
Distributions	(119)		(267)
Adjustment to redemption value	1,820	1,474	456	2,135
Balance as of the end of the period	$ 9,678	$ 9,929	$ 9,678	$ 9,929