UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income	$ 11,406	$ 4,536	$ 38,427	$ 14,936
Other comprehensive income (loss), net of tax
Unrealized (loss) gain on available-for-sale marketable securities, net of tax	(1)	56	126	342
Foreign currency translation adjustments	1,859	(1,224)	2,640	(1,231)
Total other comprehensive income (loss), net of tax	1,858	(1,168)	2,766	(889)
Comprehensive income	$ 13,264	$ 3,368	$ 41,193	$ 14,047