GOODWILL: (Details) - USD ($) $ in Thousands	12 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Goodwill
Goodwill at the beginning of year	$ 297,796	$ 204,656
Change in foreign currency translation adjustment	1,203	(589)
Goodwill at the end of year	357,446	297,796
Faktor B. V.
Goodwill
Goodwill, acquired during period		3,110
Data Plus Math Corporation
Goodwill
Goodwill, acquired during period		$ 90,619
Acuity Data
Goodwill
Goodwill, acquired during period	2,011
DataFleets, Ltd
Goodwill
Goodwill, acquired during period	$ 56,436

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 45
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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