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
Net income	$ 39,365	$ 38,716	$ 97,875	$ 90,266
Other comprehensive income (loss), net of tax:
Amortization of loss on cash flow hedge	215	215	646	646
Foreign currency translation adjustment	(1,387)	524	(357)	(1,803)
Other comprehensive income (loss), net of tax	(1,172)	739	289	(1,157)
Comprehensive income	$ 38,193	$ 39,455	$ 98,164	$ 89,109