Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income	$ 15,014	$ 11,198	$ 29,490	$ 21,773
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of $0 tax in 2017 and 2016	1,186	(2,039)	2,492	(1,541)
Change in unrealized gain (loss) on available-for-sale securities, net of $0 tax in 2017 and 2016	141	(7)	343	203
Total other comprehensive income (loss), net of tax	1,327	(2,046)	2,835	(1,338)
Comprehensive income	$ 16,341	$ 9,152	$ 32,325	$ 20,435