ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	$ (37,896)	$ (30,624)
Other comprehensive income (loss) before reclassifications	(3,427)	9,061
Amounts reclassified from accumulated other comprehensive income (loss)	4
Balance at the end of the period	(41,319)	(21,563)
Foreign currency translation adjustments
Changes in accumulated other comprehensive income (loss)
Balance at the beginning of the period	(38,580)	(31,216)
Other comprehensive income (loss) before reclassifications	(3,633)	9,102
Balance at the end of the period	(42,213)	(22,114)
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 income (loss) before reclassifications	206	(41)
Amounts reclassified from accumulated other comprehensive income (loss)	4
Balance at the end of the period	$ 294	$ (66)