Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income	$ 16,307	$ 31,917	$ 33,883	$ 62,208
Other comprehensive loss:
Foreign currency translation adjustment	(2,033)	(6,002)	(2,727)	(1,171)
Deferred income tax benefit	712	2,101	954	410
Other comprehensive loss, net of tax	(1,321)	(3,901)	(1,773)	(761)
Comprehensive income	$ 14,986	$ 28,016	$ 32,110	$ 61,447