Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 362,431	$ 368,707	$ 284,501
Other comprehensive loss:
Foreign currency translation loss, net of tax	(279,303)	(223,691)	(64,471)
Total other comprehensive loss	(279,303)	(223,691)	(64,471)
Total comprehensive income	$ 83,128	$ 145,016	$ 220,030