CONDENSED CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (14,188)	$ 5,529	$ (31,768)	$ (36,862)
Other comprehensive income (loss)
Unrealized gains (losses) on interest rate swaps	15,826	(14,759)	75,726	(4,198)
(Gains) losses from interest rate swaps reclassified into earnings from accumulated other comprehensive income	(3,596)	6,059	(3,325)	8,770
Other comprehensive income (loss)	12,230	(8,700)	72,401	4,572
Comprehensive income (loss)	(1,958)	(3,171)	40,633	(32,290)
Comprehensive (income) loss attributable to non-controlling interests	48	0	(705)	0
Comprehensive income (loss) attributable to common shareholders	$ (1,910)	$ (3,171)	$ 39,928	$ (32,290)