CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income ( loss)	$ 54,735	$ (41,369)	$ (12,288)	$ (76,772)
Other comprehensive (loss) income:
Foreign currency translation adjustment	(7,782)	(11,452)	1,320	(7,480)
Change in unrealized gains on cash flow hedges, net of taxes				32
Unrealized losses on available-for-sale securities, net of taxes	(4)	(58)	(45)	(85)
Other comprehensive (loss) income	(7,786)	(11,510)	1,275	(7,533)
Comprehensive income (loss)	$ 46,949	$ (52,879)	$ (11,013)	$ (84,305)