DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Summary of Effect of Foreign Exchange Forward Contracts on Other Comprehensive Income and Results of Operations (Details) - Forward contracts - Cash flow hedges - Designated as hedging instrument - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Loss Recognized in OCI on Derivative	$ (488)	$ (288)	$ (626)	$ (806)
Gain Reclassified from Accumulated OCI into Income	193	159	204	1,949
Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing)	18	39	(43)	81
Research and development
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from Accumulated OCI into Income	12	46	(6)	132
Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing)	39	39	70	102
Sales and marketing
Derivative Instruments, Gain (Loss) [Line Items]
Gain Reclassified from Accumulated OCI into Income	181	113	210	1,817
Gain (Loss) Recognized in Income (Amount Excluded from Effectiveness Testing)	$ (21)	$ 0	$ (113)	$ (21)