SOFTWARE DEVELOPMENT COSTS AND LICENSES (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Apr. 01, 2018	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	$ 12,676		$ 22,188	$ 33,284
Software development costs and licenses, Non-current	719,870			639,369
Software development impairment charges	0	$ 684
Software development costs, internally developed
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	5,219			19,338
Software development costs and licenses, Non-current	581,872			515,761
Software development costs, externally developed
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	1,097			4,275
Software development costs and licenses, Non-current	135,566			122,270
Licenses
Finite-Lived Intangible Assets [Line Items]
Software development costs and licenses, Current	6,360			9,671
Software development costs and licenses, Non-current	$ 2,432			$ 1,338