Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
Foreign currency exchange hedge, net of tax	$ (242)	$ (179)	$ (215)	$ (363)
Securities available-for-sale, net of tax	11	(40)	(14)	(174)
Other Income, net of tax	$ 0	$ 0	$ (299)	$ (34)