CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (5,250)	$ (5,971)	$ (10,333)	$ 43,937
Other comprehensive (loss) income:
Unrealized (loss) gain on derivative instruments	(1,353)	398	(2,222)	1,530
Other comprehensive (loss) income	(1,353)	398	(2,222)	1,530
Comprehensive (loss) income	(6,603)	(5,573)	(12,555)	45,467
Comprehensive loss (income) attributable to non-controlling interests	1,346	1,160	2,446	(23,872)
Comprehensive (loss) income attributable to common stockholders	$ (5,257)	$ (4,413)	$ (10,109)	$ 21,595