CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (10,128)	$ (7,684)	$ (8,244)	$ (2,458)
Other comprehensive loss:
Pro rata share of other comprehensive income (loss) of unconsolidated joint ventures	365	(1,696)	4,749	(16,357)
Comprehensive loss	(9,763)	(9,380)	(3,495)	(18,815)
Less comprehensive (income) loss attributable to noncontrolling interests in:
Consolidated joint ventures	(7,428)	(405)	(13,156)	(1,919)
Consolidated real estate fund	29	1,233	(68)	1,208
Operating Partnership	1,552	729	1,511	1,744
Comprehensive loss attributable to common stockholders	$ (15,610)	$ (7,823)	$ (15,208)	$ (17,782)