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NET INCOME PER SHARE NET INCOME (LOSS) PER SHARE (Details)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]    
Anti-dilutive potential common shares (in thousands of shares) 6,804us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 4,372us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Options    
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]    
Anti-dilutive potential common shares (in thousands of shares) 5,452us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember		 4,132us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Non-vested restricted stock units    
Antidilutive Securities Excluded from Computation of Net Loss Per Share [Line Items]    
Anti-dilutive potential common shares (in thousands of shares) 1,352us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= avid_NonVestedRestrictedStockAndRestrictedStockUnitsMember		 240us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= avid_NonVestedRestrictedStockAndRestrictedStockUnitsMember