ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (30,624)	$ 2,116
Other comprehensive (loss) income before reclassifications	1,275	(7,533)
Balance at the end of the period	(29,349)	(5,417)
Foreign currency translation adjustments
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(31,216)	1,531
Other comprehensive (loss) income before reclassifications	1,320	(7,480)
Balance at the end of the period	(29,896)	(5,949)
Unrealized gain (loss) on derivative instruments
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	617	585
Other comprehensive (loss) income before reclassifications		32
Balance at the end of the period	617	617
Unrealized gain (loss) on available-for-sale securities
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(25)
Other comprehensive (loss) income before reclassifications	(45)	(85)
Balance at the end of the period	$ (70)	$ (85)