GOODWILL AND OTHER INTANGIBLE ASSETS, Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Other Intangible Assets [Abstract]
Intangibles Assets, Gross Carrying Amount	$ 67,595	$ 47,503
Intangibles Assets, Accumulated amortization / Impairment Loss	(28,667)	(21,201)
Intangible Assets, Net Carrying Amount	38,928	26,302
Total amortization expense	7,900	6,400	$ 4,400
Future amortization expense for years ended March 31 [Abstract]
2020	9,800
2021	8,300
2022	6,900
2023	5,400
2024	3,800
Customer Relationships & Other Intangibles [Member]
Other Intangible Assets [Abstract]
Intangibles Assets, Gross Carrying Amount	57,407	41,895
Intangibles Assets, Accumulated amortization / Impairment Loss	(23,865)	(18,634)
Intangible Assets, Net Carrying Amount	$ 33,542	23,261
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	$ 10,188	5,608
Intangibles Assets, Accumulated amortization / Impairment Loss	(4,802)	(2,567)
Intangible Assets, Net Carrying Amount	$ 5,386	$ 3,041
Estimated useful life	5 years

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References