Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income	$ 30,745	$ 30,723	$ 95,783	$ 78,072
Foreign currency translation adjustment	(8,166)	(2,934)	(8,852)	(11,272)
Change in fair value on available-for-sale investments, net of tax expense (benefit) of zero and $184 for the three and nine months ended September 30, 2019, respectively, and $58 and ($454) for the three and nine months ended September 30, 2018, respectively	0	178	558	(1,399)
Other comprehensive loss, net of tax	(8,166)	(2,756)	(8,294)	(12,671)
Comprehensive income	$ 22,579	$ 27,967	$ 87,489	$ 65,401