Segments - Schedule of Reconciliation of NOI to Net Income Attributable to Common Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting [Abstract]
NOI	$ 113,119	$ 120,983	$ 239,364	$ 243,806
Fee income	6,209	4,213	12,539	10,212
Depreciation and amortization expense	(58,716)	(60,277)	(117,143)	(120,989)
General and administrative expenses	(17,901)	(17,695)	(30,150)	(35,138)
NOI from unconsolidated joint ventures	(10,376)	(4,185)	(23,768)	(9,596)
Loss from unconsolidated joint ventures	(5,955)	(456)	(10,176)	(1,483)
Interest and other income, net	2,252	2,583	1,256	6,483
Interest and debt expense	(36,009)	(37,213)	(72,628)	(74,137)
NOI from discontinued operations	(2,147)	(4,404)	(4,358)	(8,887)
Other, net	(169)	(163)	(320)	(853)
(Loss) income from continuing operations, before income taxes	(9,693)	3,386	(5,384)	9,418
Income tax expense	(138)	(268)	(742)	(1,406)
(Loss) income from continuing operations, net	(9,831)	3,118	(6,126)	8,012
Income from discontinued operations, net	2,147	2,056	3,668	4,162
Net (loss) income	(7,684)	5,174	(2,458)	12,174
Consolidated joint ventures	(405)	(2,408)	(1,919)	(5,202)
Consolidated real estate fund	1,235	(53)	1,212	(147)
Operating Partnership	584	(258)	243	(661)
Net (loss) income attributable to common stockholders	$ (6,270)	$ 2,455	$ (2,922)	$ 6,164