Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
COMPREHENSIVE INCOME:
Net income	$ 91,616	$ 89,706	$ 175,032	$ 167,628
Foreign currency translation adjustments, net of tax	(4,193)	6,383	3,793	(13,579)
Total comprehensive income	$ 87,423	$ 96,089	$ 178,825	$ 154,049