Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 67,288	$ 83,854	$ 147,745	$ 158,670
Net cumulative translation adjustment and foreign currency exchange hedge, net of tax of $(133), $121, $(546), and $2,562, respectively	1,138	(351)	(794)	(4,210)
Net unrealized gain on securities available-for-sale, net of tax of $259 and $104, respectively		820		329
Comprehensive income	$ 68,426	$ 84,323	$ 146,951	$ 154,789