CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 10,555	$ 12,684	$ 27,149	$ 14,814
Other comprehensive (loss) income:
Foreign currency translation losses	(2,520)	(2,944)	(212)	(8,184)
Net unrealized losses on marketable securities	(32)	(23)	(16)	(18)
Other comprehensive loss	(2,552)	(2,967)	(228)	(8,202)
Comprehensive income	$ 8,003	$ 9,717	$ 26,921	$ 6,612