SOFTWARE DEVELOPMENT COSTS AND LICENSES (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	$ 62,328	$ 28,880
Software development costs and licenses, Non-current	527,622	603,436
Software development costs, internally developed
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	40,292	14,809
Software development costs and licenses, Non-current	417,113	434,712
Software development costs, externally developed
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	10,690	3,655
Software development costs and licenses, Non-current	108,077	168,381
Licenses
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	11,346	10,416
Software development costs and licenses, Non-current	$ 2,432	$ 343