ACQUISITION, GOODWILL, AND ACQUIRED INTANGIBLE ASSETS ACQUISITION, GOODWILL, AND ACQUIRED INTANGIBLE ASSETS - Pro Forma (Details) - Polycom [Member] $ in Thousands	6 Months Ended
Sep. 30, 2019 USD ($)
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue	$ 954,565
Business Acquisition, Pro Forma Operating Income (Loss)	(123,589)
Business Acquisition, Pro Forma Net Income (Loss)	(130,409)
amortizationexpenseofpurchaseintangibleassets [Member]
Business Acquisition [Line Items]
Revenues	$ 42,800

Business Acquisition, Pro Forma Operating Income (Loss)

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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-Publisher FASB
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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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