Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Foreign currency exchange hedge, tax expense (benefit)	$ (1,468)	$ (1,218)	$ 1,290
Securities available-for-sale, tax expense (benefit)	$ (172)	$ 312	$ (23)