Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 31,917	$ 29,944	$ 62,208	$ 60,108
Other comprehensive (loss) income:
Foreign currency translation adjustment	(6,002)	1,436	(1,171)	5,251
Deferred income tax benefit (expense)	2,101	(591)	410	(810)
Other comprehensive (loss) income, net of tax	(3,901)	845	(761)	4,441
Comprehensive income	$ 28,016	$ 30,789	$ 61,447	$ 64,549