CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (291,965)	$ (29,415)	$ (772,259)	$ 972
Other comprehensive income (loss), net of tax effect:
Derivatives	(5,353)	30,975	(45,691)	14,620
Foreign currency translation	(246)	(1,625)	(2,567)	(1,369)
Comprehensive income (loss)	$ (297,564)	$ (65)	$ (820,517)	$ 14,223