CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (152,906)	$ 4,444	$ (480,294)	$ 30,387
Other comprehensive income (loss), net of tax effect:
Derivatives	(31,480)	(9,765)	(40,338)	(16,355)
Foreign currency translation	1,324	755	(2,321)	256
Comprehensive income (loss)	$ (183,062)	$ (4,566)	$ (522,953)	$ 14,288