Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income	$ 38,101	$ 32,589	$ 31,697	$ 65,038
Foreign currency translation adjustment	(169)	(1,177)	(8,883)	(686)
Change in fair value on available-for-sale investments, net of tax expense of $173 and $173 for the three and six months ended June 30, 2020, respectively, and $7 and $184 for the three and six months ended June 30, 2019, respectively.	(163)	(2)	545	558
Unrealized gain on available-for-sale investments	173	7	173	184
Other comprehensive loss, net of tax	(332)	(1,179)	(8,338)	(128)
Comprehensive income	$ 37,769	$ 31,410	$ 23,359	$ 64,910