Redeemable Noncontrolling Interests - Summary of the Activity of Redeemable Noncontrolling Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Temporary Equity
Balance as of the beginning of the period	$ 546,049	$ 552,927	$ 522,725	$ 530,748
OP Unit redemptions	(1,762)	(17,761)	(7,776)	(21,680)
LTIP Units issued in lieu of cash bonuses (1)	987	797	6,584	5,614
Net income (loss)	18,248	(345)	18,258	(2,575)
Other comprehensive income	1,311	235	4,277	1,208
Distributions	(4,189)	(3,927)	(4,258)	(5,289)
Share-based compensation expense	12,369	12,807	24,896	25,371
Adjustment to redemption value	(51,621)	(94)	(43,314)	11,242
Balance as of the end of the period	521,392	544,639	521,392	544,639
JBG Smith, LP
Temporary Equity
Balance as of the beginning of the period	536,725	545,051	513,268	522,882
OP Unit redemptions	(1,762)	(17,761)	(7,776)	(21,680)
LTIP Units issued in lieu of cash bonuses (1)	987	797	6,584	5,614
Net income (loss)	18,240	(319)	18,237	(2,516)
Other comprehensive income	1,311	235	4,277	1,208
Distributions	(4,110)	(3,927)	(4,110)	(5,289)
Share-based compensation expense	12,369	12,807	24,896	25,371
Adjustment to redemption value	(50,334)	(712)	(41,950)	10,581
Balance as of the end of the period	513,426	536,171	513,426	536,171
Consolidated Real Estate Venture
Temporary Equity
Balance as of the beginning of the period	9,324	7,876	9,457	7,866
Net income (loss)	8	(26)	21	(59)
Distributions	(79)		(148)
Adjustment to redemption value	(1,287)	618	(1,364)	661
Balance as of the end of the period	$ 7,966	$ 8,468	$ 7,966	$ 8,468