CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (105,826)	$ (78,239)	$ (160,208)
Other comprehensive loss
Unrealized gains on interest rate swaps	31,636	0	0
Losses from interest rate swaps reclassified into earnings from accumulated other comprehensive income	16,708	0	0
Other comprehensive income	48,344	0	0
Comprehensive loss	(57,482)	(78,239)	(160,208)
Comprehensive loss attributable to non-controlling interests	30	0	0
Comprehensive loss attributable to common shareholders	$ (57,452)	$ (78,239)	$ (160,208)