GOODWILL AND OTHER INTANGIBLE ASSETS, Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021
Other Intangible Assets [Abstract]
Gross carrying amount	$ 87,772		$ 87,772		$ 87,888
Accumulated amortization	(55,208)		(55,208)		(49,274)
Net carrying amount	32,564		32,564		38,614
Customer Relationships and Other Intangibles [Member]
Other Intangible Assets [Abstract]
Gross carrying amount	77,281		77,281		77,335
Accumulated amortization	(47,424)		(47,424)		(42,115)
Net carrying amount	29,857		29,857		35,220
Total amortization expense	3,000	$ 2,500	$ 6,000	$ 5,000
Customer Relationships and Other Intangibles [Member] | Minimum [Member]
Other Intangible Assets [Abstract]
Estimated useful life			5 years
Customer Relationships and Other Intangibles [Member] | Maximum [Member]
Other Intangible Assets [Abstract]
Estimated useful life			10 years
Capitalized Software Development [Member]
Other Intangible Assets [Abstract]
Gross carrying amount	10,491		$ 10,491		10,553
Accumulated amortization	(7,784)		(7,784)		(7,159)
Net carrying amount	$ 2,707		$ 2,707		$ 3,394
Capitalized Software Development [Member] | Minimum [Member]
Other Intangible Assets [Abstract]
Estimated useful life			5 years