Condensed Consolidated Statement of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income	$ 18,871	$ 25,820
Foreign currency translation adjustment	6,310	3,582
Change in fair value on available-for-sale investments, net of tax expense (benefit) of zero and zero for the three months ended March 31, 2018 and 2017	(2,500)	0
Other comprehensive income, net of tax	3,810	3,582
Comprehensive income	$ 22,681	$ 29,402