Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 651,642	$ 557,054	$ 478,035
Other comprehensive (loss) income:
Foreign currency translation adjustments	(38,514)	19,629	(1,020)
Change in unrealized (loss) gain on investments, net of income tax (benefit) provision of $(3,412), $2,720 and $666 for the years ended December 31, 2021, 2020 and 2019, respectively	(10,390)	5,314	4,788
Other comprehensive (loss) income	(48,904)	24,943	3,768
Comprehensive income	$ 602,738	$ 581,997	$ 481,803