GOODWILL AND INTANGIBLE ASSETS: (Details) $ in Thousands	6 Months Ended
Sep. 30, 2019 USD ($)
Goodwill
Goodwill at the beginning of year	$ 204,656
Acquisition of Faktor	3,110
Acquisition of DPM	89,942
Change in foreign currency translation adjustment	(231)
Goodwill at the end of year	297,477
U.S.
Goodwill
Goodwill at the end of year	294,404
APAC
Goodwill
Goodwill at the end of year	$ 3,073

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.

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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.

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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.

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Amount of increase (decrease), classified as other, of an asset representing the future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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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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