Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 299,377	$ 204,902	$ 172,852
Net cumulative translation adjustment and foreign currency exchange hedge, net of tax of $(1,468), $(1,218) and $1,290, respectively	6,164	1,128	(2,078)
Net unrealized gain (loss) on securities available-for-sale, net of tax of $(172), $312, and $(23), respectively	(544)	996	(90)
Comprehensive income	$ 304,997	$ 207,026	$ 170,684