Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income	$ 242,023	$ 164,375	$ 108,839
Other comprehensive income, net of tax:
Foreign currency translation adjustments	8,404	14,150	(1,706)
Change in unrealized gain (loss) on available-for-sale securities, net of tax of $613, $(325) and $(203), respectively	(2,664)	1,466	1,773
Other comprehensive income, net of tax	5,740	15,616	67
Comprehensive income	$ 247,763	$ 179,991	$ 108,906