SOFTWARE DEVELOPMENT COSTS AND LICENSES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Apr. 01, 2018	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	$ 33,542		$ 33,542		$ 22,188	$ 33,284
Software development costs and licenses, Non-current	597,497		597,497			639,369
Software development impairment charges	7,426	$ 0	7,426	$ 960
Software development costs, internally developed
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	23,217		23,217			19,338
Software development costs and licenses, Non-current	440,876		440,876			515,761
Software development costs, externally developed
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	8,810		8,810			4,275
Software development costs and licenses, Non-current	156,521		156,521			122,270
Licenses
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	1,515		1,515			9,671
Software development costs and licenses, Non-current	$ 100		$ 100			$ 1,338