CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Total revenues	$ 374,914	$ 362,406	$ 311,173
Operating expenses:
Property operating and maintenance	234,185
Property operating and maintenance		220,997	186,277
Impairment charges	55,969	20,655	18,993
Operating fees to related parties	23,414	23,071	22,257
Acquisition and transaction related	362	302	2,986
General and administrative	20,530	17,275	15,673
Depreciation and amortization	81,032	83,212	77,641
Total expenses	415,492	365,512	323,827
Operating loss before (loss) gain on sale of real estate investments	(40,578)	(3,106)	(12,654)
Gain (loss) on sale of real estate investments	8,790	(70)	438
Operating loss	(31,788)	(3,176)	(12,216)
Other income (expense):
Interest expense	(56,059)	(49,471)	(30,264)
Interest and other income	7	23	306
Loss on non-designated derivatives	(68)	(157)	(198)
Gain on asset acquisition	0	0	307
Total other expenses	(56,120)	(49,605)	(29,849)
Loss before income taxes	(87,908)	(52,781)	(42,065)
Income tax expense	(399)	(197)	(647)
Net loss	(88,307)	(52,978)	(42,712)
Net loss attributable to non-controlling interests	393	216	164
Preferred stock dividends	(173)	0	0
Net loss attributable to common stockholders	(88,087)	(52,762)	(42,548)
Other comprehensive income (loss):
Unrealized (loss) gain on designated derivative	(11,625)	2,109	2,473
Comprehensive loss attributable to common stockholders	$ (99,712)	$ (50,653)	$ (40,075)
Basic and diluted weighted average shares outstanding (in shares)	91,936,641	91,118,929	89,802,174
Basic and diluted net loss per share (in usd per share)	$ (0.96)	$ (0.58)	$ (0.47)