COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Aug. 20, 2017	Aug. 19, 2016
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability	$ 5,449	$ 7,293
Unconditional purchase obligation	32,200
Total rent expense under non-cancelable operating leases	13,800	$ 12,800	$ 5,900
Avvasi
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability					$ 660
Simena LLC
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability	8,000
Simena LLC | Present value of future consideration
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability	$ 4,800
Forecast | Avvasi
Commitments and Contingencies Disclosure [Line Items]
Fair value of contingent liability				$ 660