Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
COMPREHENSIVE INCOME:
Net income	$ 61,551	$ 55,863
Foreign currency translation adjustments, net of tax	405	(5,771)
Total comprehensive income	$ 61,956	$ 50,092