Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income	$ 20,693	$ 24,206	$ 46,874	$ 46,062
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(3,709)	(6,862)	(32)	(2,473)
Change in unrealized gain (loss) on available-for-sale securities, net of tax of $(64), $0, $(162) and $0, respectively	611	115	1,437	(1,045)
Other comprehensive income (loss), net of tax	(3,098)	(6,747)	1,405	(3,518)
Comprehensive income	$ 17,595	$ 17,459	$ 48,279	$ 42,544