CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (195,761)	$ (152,906)	$ (384,545)	$ (480,294)
Other comprehensive income (loss), net of tax effect:
Derivatives	(11,356)	(31,480)	(16,640)	(40,338)
Foreign currency translation	0	1,324	6,073	(2,321)
Comprehensive loss	$ (207,117)	$ (183,062)	$ (395,112)	$ (522,953)