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
Statement of Comprehensive Income [Abstract]
Net income	$ 129,618	$ 116,770	$ 356,961	$ 309,601
Other comprehensive loss:
Foreign currency translation loss, net of tax	(52,409)	(163,030)	(41,339)	(263,968)
Total other comprehensive loss	(52,409)	(163,030)	(41,339)	(263,968)
Total comprehensive income (loss)	$ 77,209	$ (46,260)	$ 315,622	$ 45,633