Condensed Consolidated Statements of Comprehensive Income (Unaudited) (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	$ 15,664	$ 14,463	$ 33,039	$ 30,097
Foreign currency translation adjustments	(7,555)	(7,917)	(10,319)	(3,922)
Comprehensive income	$ 8,109	$ 6,546	$ 22,720	$ 26,175