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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Discontinued Operations (Details) (USD $)
12 Months Ended 6 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jul. 01, 2012
Jul. 02, 2012
Disposal Group, Including Discontinued Operation, Assets         $ 25,000,000us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation
Significant Acquisitions and Disposals, Acquisition Costs or Sale Proceeds         14,800,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds
Proceeds from Sale of Productive Assets 1,500,000us-gaap_ProceedsFromSaleOfProductiveAssets 0us-gaap_ProceedsFromSaleOfProductiveAssets 11,400,000us-gaap_ProceedsFromSaleOfProductiveAssets    
Significant Acquisitions and Disposals, Costs to Sell         1,900,000avid_SignificantAcquisitionsandDisposalsCoststoSell
Significant Acquisitions and Disposals, Gain (Loss) on Sale or Disposal, Net of Tax         38,000,000us-gaap_SignificantAcquisitionsAndDisposalsGainLossOnSaleOrDisposalNetOfTax
Disposal Group, Including Discontinued Operation, Operating Income (Loss) 0us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss 0us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss      
Scenario, Actual [Member]          
Proceeds from Sale of Productive Assets     11,440,000us-gaap_ProceedsFromSaleOfProductiveAssets
/ us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis
= us-gaap_ScenarioActualMember
   
Disposal Group, Including Discontinued Operation, Operating Income (Loss)     7,832,000us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
/ us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis
= us-gaap_ScenarioActualMember
   
Disposal Group, Including Discontinued Operation, Revenue       $ 46,100,000us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
/ us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis
= us-gaap_ScenarioActualMember