CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (19,196)	$ (29,603)	$ 18,993
Other comprehensive (loss) income:
Change in value of interest rate swaps		(28,069)	7,273
Pro rata share of other comprehensive (loss) income of unconsolidated joint ventures	(13,894)	206	(129)
Comprehensive (loss) income	(33,090)	(57,466)	26,137
Less comprehensive (income) loss attributable to noncontrolling interests in:
Consolidated joint ventures	(9,257)	(11,022)	(8,182)
Consolidated real estate fund	1,434	(360)	(665)
Operating Partnership	3,589	6,726	(1,605)
Comprehensive (loss) income attributable to common stockholders	$ (37,324)	$ (62,122)	$ 15,685