Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net (loss) income	$ (15,370)	$ (155,946)	$ 70,976	$ (206,673)
Foreign currency translation adjustments	(5,525)	(171,089)	131,659	(319,006)
Comprehensive (loss) income	$ (20,895)	$ (327,035)	$ 202,635	$ (525,679)