UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net (loss)/income	$ (1,812)	$ 3,301	$ 36,615	$ 18,237
Other comprehensive income/(loss), net of tax
Unrealized gain/(loss) on available-for-sale marketable securities, net of tax	22	(174)	148	168
Foreign currency translation adjustments	549	(169)	3,189	(1,400)
Total other comprehensive income/(loss), net of tax	571	(343)	3,337	(1,232)
Comprehensive (loss)/income	$ (1,241)	$ 2,958	$ 39,952	$ 17,005