Segments - Schedule of Reconciliation of NOI to Net (Loss) Income Attributable to Common Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting [Abstract]
NOI	$ 114,849	$ 124,483	$ 354,213	$ 368,289
Fee income	9,153	7,159	21,692	17,371
Depreciation and amortization expense	(58,889)	(60,696)	(176,032)	(181,685)
General and administrative expenses	(16,805)	(16,319)	(46,955)	(51,457)
NOI from unconsolidated joint ventures	(12,935)	(4,973)	(36,703)	(14,569)
Loss from unconsolidated joint ventures	(4,268)	(1,332)	(14,444)	(2,815)
Interest and other income, net	1,104	1,222	2,360	7,705
Interest and debt expense	(35,792)	(37,325)	(108,420)	(111,462)
NOI from discontinued operations	(2,157)	(4,262)	(6,515)	(13,149)
Other, net	(137)	(580)	(457)	(1,433)
(Loss) income from continuing operations, before income taxes	(5,877)	7,377	(11,261)	16,795
Income tax (expense) benefit	(393)	583	(1,135)	(823)
(Loss) income from continuing operations, net	(6,270)	7,960	(12,396)	15,972
Income from discontinued operations, net	2,147	3,040	5,815	7,202
Net (loss) income	(4,123)	11,000	(6,581)	23,174
Consolidated joint ventures	(3,566)	(3,051)	(5,485)	(8,253)
Consolidated real estate fund	79	(109)	1,291	(256)
Operating Partnership	652	(758)	895	(1,419)
Net (loss) income attributable to common stockholders	$ (6,958)	$ 7,082	$ (9,880)	$ 13,246