Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 57,958	$ 67,776	$ 205,703	$ 226,446
Net cumulative translation adjustment and foreign currency exchange hedge, net of tax of $554, $1,654, $8, and $(908), respectively	(5,149)	4,423	(5,943)	213
Net unrealized gain on securities available-for-sale, net of tax of $0, $(276), $0 and $(172), respectively		(871)		(542)
Comprehensive income	$ 52,809	$ 71,328	$ 199,760	$ 226,117