CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net (loss) income	$ (4,123)	$ 11,000	$ (6,581)	$ 23,174
Other comprehensive (loss) income:
Change in value of interest rate swaps		(4,131)		(28,502)
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	904	41	(15,453)	(143)
Comprehensive (loss) income	(3,219)	6,910	(22,034)	(5,471)
Less comprehensive (income) loss attributable to noncontrolling interests in:
Consolidated joint ventures	(3,566)	(3,051)	(5,485)	(8,253)
Consolidated real estate fund	75	(106)	1,283	(205)
Operating Partnership	575	(362)	2,319	1,335
Comprehensive (loss) income attributable to common stockholders	$ (6,135)	$ 3,391	$ (23,917)	$ (12,594)