GOODWILL AND OTHER INTANGIBLE ASSETS, Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Other Intangible Assets [Abstract]
Intangibles Assets, Gross Carrying Amount	$ 73,391	$ 67,595
Intangibles Assets, Accumulated amortization	(38,927)	(28,667)
Intangible Assets, Net Carrying Amount	34,464	38,928
Total amortization expense	9,400	7,900	$ 6,400
Future amortization expense for years ended March 31 [Abstract]
2021	8,200
2022	6,600
2023	5,100
2024	3,800
2025	2,700
Customer Relationships & Other Intangibles [Member]
Other Intangible Assets [Abstract]
Intangibles Assets, Gross Carrying Amount	63,006	57,407
Intangibles Assets, Accumulated amortization	(33,000)	(23,865)
Intangible Assets, Net Carrying Amount	$ 30,006	33,542
Customer Relationships & Other Intangibles [Member] | Minimum [Member]
Other Intangible Assets [Abstract]
Estimated useful life	5 years
Customer Relationships & Other Intangibles [Member] | Maximum [Member]
Other Intangible Assets [Abstract]
Estimated useful life	10 years
Capitalized Software Development [Member]
Other Intangible Assets [Abstract]
Intangibles Assets, Gross Carrying Amount	$ 10,385	10,188
Intangibles Assets, Accumulated amortization	(5,927)	(4,802)
Intangible Assets, Net Carrying Amount	$ 4,458	$ 5,386
Estimated useful life	5 years