Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
COMPREHENSIVE INCOME:
Net income	$ 85,184	$ 66,358	$ 221,875	$ 185,310
Foreign currency translation adjustments, net of tax	(15,281)	6,775	(12,995)	(4,486)
Total comprehensive income	$ 69,903	$ 73,133	$ 208,880	$ 180,824