Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 164,375	$ 108,839	$ 105,268
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	14,150	(1,706)	(7,082)
Change in unrealized gain (loss) on available-for-sale securities, net of tax of $(325), $(203) and $209, respectively	1,466	1,773	(274)
Other comprehensive income (loss), net of tax	15,616	67	(7,356)
Comprehensive income	$ 179,991	$ 108,906	$ 97,912