ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Changes in accumulated other comprehensive loss
Balance	$ (15,732)	$ (47,142)
Other comprehensive income (loss) before reclassifications	(38,450)	14,060
Amounts reclassified from accumulated other comprehensive loss	3,228	1,987
Balance	(50,954)	(31,095)
Foreign currency translation adjustments
Changes in accumulated other comprehensive loss
Balance	(4,287)	(47,666)
Other comprehensive income (loss) before reclassifications	(40,666)	23,391
Amounts reclassified from accumulated other comprehensive loss	0	0
Balance	(44,953)	(24,275)
Unrealized gain (loss) on forward contracts
Changes in accumulated other comprehensive loss
Balance	600	600
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss	0	0
Balance	600	600
Unrealized gain (loss) on cross-currency swap
Changes in accumulated other comprehensive loss
Balance	(10,191)	0
Other comprehensive income (loss) before reclassifications	1,158	(8,626)
Amounts reclassified from accumulated other comprehensive loss	3,228	1,987
Balance	(5,805)	(6,639)
Unrealized gain (loss) on available-for- sales securities
Changes in accumulated other comprehensive loss
Balance	(1,854)	(76)
Other comprehensive income (loss) before reclassifications	1,058	(705)
Amounts reclassified from accumulated other comprehensive loss	0	0
Balance	$ (796)	$ (781)