GOODWILL AND OTHER INTANGIBLE ASSETS (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Unit	Sep. 30, 2017 USD ($)	Mar. 31, 2018 USD ($)
Goodwill [Roll Forward]
Goodwill, Beginning Balance			$ 85,297	$ 57,070
Goodwill, Accumulated Amortization / Impairment Loss, Beginning Balance			(8,673)	(8,673)
Goodwill, Net Carrying Amount, Beginning Balance			76,624	48,397
Acquisitions			0	27,939
Foreign currency translations			(179)	134
Goodwill, Ending Balance	$ 85,118	$ 85,143	85,118	85,143
Goodwill, Accumulated Amortization / Impairment Loss, Ending Balance	(8,673)	(8,673)	(8,673)	(8,673)
Goodwill, Net Carrying Amount, Ending Balance	76,445	76,470	$ 76,445	76,470
Number of reporting units | Unit			1
Other Intangible Assets [Abstract]
Intangibles assets, Gross carrying amount	48,110		$ 48,110		$ 47,503
Intangibles Assets, Accumulated amortization / Impairment Loss	(24,305)		(24,305)		(21,201)
Intangible assets, Net Carrying Amount	23,805		23,805		26,302
Total amortization expense for other intangible assets	1,800	$ 1,200	3,600	$ 2,400
Customer Relationships and Other Intangibles [Member]
Other Intangible Assets [Abstract]
Intangibles assets, Gross carrying amount	41,974		41,974		41,895
Intangibles Assets, Accumulated amortization / Impairment Loss	(22,026)		(22,026)		(18,634)
Intangible assets, Net Carrying Amount	19,948		$ 19,948		23,261
Customer Relationships [Member] | Minimum [Member]
Other Intangible Assets [Abstract]
Estimated useful life			3 years
Customer Relationships [Member] | Maximum [Member]
Other Intangible Assets [Abstract]
Estimated useful life			8 years
Capitalized Software Development [Member]
Other Intangible Assets [Abstract]
Intangibles assets, Gross carrying amount	6,136		$ 6,136		5,608
Intangibles Assets, Accumulated amortization / Impairment Loss	(2,279)		(2,279)		(2,567)
Intangible assets, Net Carrying Amount	$ 3,857		$ 3,857		$ 3,041
Capitalized Software Development [Member] | Minimum [Member]
Other Intangible Assets [Abstract]
Estimated useful life			3 years
Capitalized Software Development [Member] | Maximum [Member]
Other Intangible Assets [Abstract]
Estimated useful life			8 years
Trade Names and Trademarks [Member]
Other Intangible Assets [Abstract]
Estimated useful life			10 years