Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income	$ 68,770	$ 55,566	$ 169,352	$ 121,488
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(371)	6,936	2,592	5,072
Change in unrealized gain (loss) on available-for-sale securities, net of tax of $32, $30, $177 and $(321), respectively	(268)	(368)	(1,070)	2,888
Other comprehensive income (loss), net of tax	(639)	6,568	1,522	7,960
Comprehensive income	$ 68,131	$ 62,134	$ 170,874	$ 129,448