CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS
Net income (loss)	$ 36,432	$ 54,735	$ (2,135)	$ (12,288)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(1,394)	(7,782)	(5,027)	1,320
Unrealized (loss) gain, net on available-for-sale securities, net of taxes	(163)	(4)	43	(45)
Reclassification to earnings for realized losses, net on available for sale securities, net of taxes	5		9
Change in fair value of available for sale securities	(158)	(4)	52	(45)
Other comprehensive (loss) income	(1,552)	(7,786)	(4,975)	1,275
Comprehensive income (loss)	$ 34,880	$ 46,949	$ (7,110)	$ (11,013)