Consolidated and Combined Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
NET INCOME	$ 48,175	$ 28,248
OTHER COMPREHENSIVE LOSS:
Change in fair value of derivative financial instruments	(33,928)	(10,696)
Reclassification of net loss (income) on derivative financial instruments from accumulated other comprehensive loss into interest expense	1,158	(839)
Other comprehensive loss	(32,770)	(11,535)
COMPREHENSIVE INCOME	15,405	16,713
Net income attributable to redeemable noncontrolling interests	(5,250)	(3,387)
Other comprehensive loss attributable to redeemable noncontrolling interests	3,573	1,383
COMPREHENSIVE INCOME ATTRIBUTABLE TO JBG SMITH PROPERTIES	$ 13,728	$ 14,709