Consolidated Statements of Comprehensive (Loss) Income - 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 (loss) income	$ (388,209)	$ 6,920	$ (394,015)	$ 137,330
Foreign currency translation adjustment	(11,538)	(9,536)	(23,275)	(9,998)
Other comprehensive loss	(11,538)	(9,536)	(23,275)	(9,998)
Comprehensive (loss) income	$ (399,747)	$ (2,616)	$ (417,290)	$ 127,332