Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Foreign currency exchange hedge, tax benefit	$ (166)	$ (91)	$ (160)	$ (237)
Securities available-for-sale, tax expense (benefit)	(43)	2	(4)	35
Sale of securities available- for-sale included in Other Income, tax benefit	$ 0	$ 0	$ 0	$ (13)