SOFTWARE DEVELOPMENT COSTS AND LICENSES (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	$ 18,070	$ 28,880
Software development costs and licenses, Non-current	633,597	603,436
Software development costs, internally developed
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	6,543	14,809
Software development costs and licenses, Non-current	453,874	434,712
Software development costs, externally developed
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	3,574	3,655
Software development costs and licenses, Non-current	175,537	168,381
Licenses
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	7,953	10,416
Software development costs and licenses, Non-current	$ 4,186	$ 343