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INCOME TAXES Deferred Tax Assets (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Deferred Tax Liability [Line Items]      
Withholding Tax Liability $ 2,600,000avid_WithholdingTaxLiability $ 500,000avid_WithholdingTaxLiability $ (35,300,000)avid_WithholdingTaxLiability
Tax credit and net operating loss carryforwards 290,523,000avid_TaxCreditAndNetOperatingLossCarryforwards 244,379,000avid_TaxCreditAndNetOperatingLossCarryforwards  
Allowances for bad debts 231,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts 277,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts  
Revenue 63,916,000us-gaap_DeferredTaxAssetsDeferredIncome 98,838,000us-gaap_DeferredTaxAssetsDeferredIncome  
Costs and expenses 29,004,000us-gaap_DeferredTaxAssetsTaxDeferredExpense 29,784,000us-gaap_DeferredTaxAssetsTaxDeferredExpense  
Inventories 7,004,000us-gaap_DeferredTaxAssetsInventory 9,209,000us-gaap_DeferredTaxAssetsInventory  
Acquired intangible assets 13,667,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount 17,726,000us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount  
Gross deferred tax assets 404,345,000us-gaap_DeferredTaxAssetsGross 400,213,000us-gaap_DeferredTaxAssetsGross  
Valuation allowance (398,733,000)us-gaap_DeferredTaxAssetsValuationAllowance (396,143,000)us-gaap_DeferredTaxAssetsValuationAllowance  
Deferred tax assets after valuation allowance 5,612,000us-gaap_DeferredTaxAssetsNet 4,070,000us-gaap_DeferredTaxAssetsNet  
Costs and expenses (3,540,000)us-gaap_DeferredTaxLiabilitiesDeferredExpense (1,712,000)us-gaap_DeferredTaxLiabilitiesDeferredExpense  
Gross deferred tax liabilities 3,540,000us-gaap_DeferredTaxLiabilities 1,712,000us-gaap_DeferredTaxLiabilities  
Net deferred tax assets 2,072,000us-gaap_DeferredTaxAssetsLiabilitiesNet 2,358,000us-gaap_DeferredTaxAssetsLiabilitiesNet  
Current deferred tax assets, net 322,000us-gaap_DeferredTaxAssetsNetCurrent 522,000us-gaap_DeferredTaxAssetsNetCurrent  
Long-term deferred tax assets, net (in other assets) 1,886,000us-gaap_DeferredTaxAssetsNetNoncurrent 2,415,000us-gaap_DeferredTaxAssetsNetNoncurrent  
Current deferred tax liabilities, net (in accrued expenses and other current liabilities) 0us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent (14,000)us-gaap_DeferredTaxAssetsLiabilitiesNetCurrent  
Long-term deferred tax liabilities, net (136,000)us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent (565,000)us-gaap_DeferredTaxAssetsLiabilitiesNetNoncurrent  
Deferred tax assets related to exercise of employee stock options excluded from deferred tax schedule 33,000,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost    
US Federal and State [Member]      
Deferred Tax Liability [Line Items]      
Tax credit carry forwards 50,200,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		    
Tax credit and net operating loss carryforwards 693,000,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		    
Foreign [Member]      
Deferred Tax Liability [Line Items]      
Tax credit carry forwards 4,400,000us-gaap_TaxCreditCarryforwardAmount
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
Tax credit and net operating loss carryforwards 23,700,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
Valuation allowance, tax credits 4,400,000us-gaap_TaxCreditCarryforwardValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		    
Valuation allowance, net operating losses $ 19,800,000us-gaap_OperatingLossCarryforwardsValuationAllowance
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember