ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (37,896)	$ (30,624)
Other comprehensive (loss) income before reclassifications	(4,984)	1,275
Amounts reclassified from accumulated other comprehensive income (loss)	9
Balance at the end of the period	(42,871)	(29,349)
Foreign currency translation adjustments
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(38,580)	(31,216)
Other comprehensive (loss) income before reclassifications	(5,027)	1,320
Balance at the end of the period	(43,607)	(29,896)
Unrealized gain (loss) on derivative instruments
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	600	617
Balance at the end of the period	600	617
Unrealized gain (loss) on available-for-sale securities
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	84	(25)
Other comprehensive (loss) income before reclassifications	43	(45)
Amounts reclassified from accumulated other comprehensive income (loss)	9
Balance at the end of the period	$ 136	$ (70)