CONDENSED CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,041	$ (22,510)	$ (30,727)	$ (59,372)
Other comprehensive income
Unrealized gains (losses) on interest rate swaps	39,488	(598)	115,214	(4,796)
(Gains) losses from interest rate swaps reclassified into earnings from accumulated other comprehensive income	(5,982)	4,193	(9,307)	12,963
Other comprehensive income	33,506	3,595	105,907	8,167
Comprehensive income (loss)	34,547	(18,915)	75,180	(51,205)
Comprehensive income attributable to non-controlling interests	(595)	0	(1,300)	0
Comprehensive income (loss) attributable to common shareholders	$ 33,952	$ (18,915)	$ 73,880	$ (51,205)