Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
COMPREHENSIVE INCOME:
Net income	$ 89,706	$ 75,140	$ 167,628	$ 136,691
Foreign currency translation adjustments, net of tax	6,383	1,881	(13,579)	2,286
Total comprehensive income	$ 96,089	$ 77,021	$ 154,049	$ 138,977