Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 109,972	$ 94,153
Other comprehensive income (loss):
Foreign currency translation gain (loss), net of tax	31,202	(159,954)
Total other comprehensive income (loss)	31,202	(159,954)
Total comprehensive income (loss)	$ 141,174	$ (65,801)