The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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GOODWILL AND OTHER INTANGIBLE ASSETS, Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Mar. 31, 2020
Other Intangible Assets [Abstract]
Gross carrying amount	$ 74,269		$ 74,269		$ 73,391
Accumulated amortization	(44,004)		(44,004)		(38,927)
Net carrying amount	30,265		30,265		34,464
Total amortization expense for other intangible assets	2,500	$ 2,500	5,000	$ 4,900
Customer Relationships and Other Intangibles [Member]
Other Intangible Assets [Abstract]
Gross carrying amount	63,093		63,093		63,006
Accumulated amortization	(37,467)		(37,467)		(33,000)
Net carrying amount	25,626		$ 25,626		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	11,176		$ 11,176		10,385
Accumulated amortization	(6,537)		(6,537)		(5,927)
Net carrying amount	$ 4,639		$ 4,639		$ 4,458
Capitalized Software Development [Member] \| Minimum [Member]
Other Intangible Assets [Abstract]
Estimated useful life			5 years