CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 36,769	$ 53,664
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	(1,266)	(32,534)
Total comprehensive income	$ 35,503	$ 21,130