Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 105,268	$ 65,203	$ 52,720
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(7,082)	6,369	(5,033)
Change in unrealized loss on available-for-sale securities, net of tax of $209, $0, and $0, respectively	(274)	(341)	(648)
Total other comprehensive income (loss), net of tax	(7,356)	6,028	(5,681)
Comprehensive income	$ 97,912	$ 71,231	$ 47,039