GOODWILL AND OTHER INTANGIBLE ASSETS, Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020
Other Intangible Assets [Abstract]
Gross carrying amount	$ 73,506		$ 73,391
Accumulated amortization	(41,460)		(38,927)
Net carrying amount	32,046		34,464
Total amortization expense for other intangible assets	2,500	$ 2,500
Customer Relationships and Other Intangibles [Member]
Other Intangible Assets [Abstract]
Gross carrying amount	63,006		63,006
Accumulated amortization	(35,228)		(33,000)
Net carrying amount	$ 27,778		30,006
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	$ 10,500		10,385
Accumulated amortization	(6,232)		(5,927)
Net carrying amount	$ 4,268		$ 4,458
Estimated useful life	5 years