Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Foreign currency exchange hedge, tax benefit	$ (69)	$ (96)	$ (229)	$ (334)
Securities available-for-sale, tax expense (benefit)	(4)	(16)	(7)	16
Sale of securities available- for-sale included in Other Income, tax benefit	$ 0	$ (7)	$ 0	$ (19)