FOREIGN CURRENCY DERIVATIVES (Details 6) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Gain (Loss) Included in Accumulated Other Comprehensive Income [Roll Forward]
Gain (loss) included in AOCI as of beginning of period	$ (1,744)	$ 415	$ 541	$ (1,106)
Amount of gain (loss) recognized in other comprehensive income (“OCI”) (effective portion)	(2,302)	(650)	(4,647)	304
Amount of gain (loss) reclassified from OCI into net revenues (effective portion)	210,300	216,183	414,226	439,289
Amount of gain (loss) reclassified from OCI into cost of revenues (effective portion)	(102,668)	(105,737)	(203,311)	(215,770)
Total amount of gain (loss) reclassified from AOCI to income (loss) (effective portion)	957	236	1,017	(331)
Gain (loss) included in AOCI as of end of period	(3,089)	(471)	(3,089)	(471)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Gain (Loss) Included in Accumulated Other Comprehensive Income [Roll Forward]
Amount of gain (loss) reclassified from OCI into net revenues (effective portion)	1,131	825	1,149	985
Amount of gain (loss) reclassified from OCI into cost of revenues (effective portion)	$ (174)	$ (589)	$ (132)	$ (1,316)