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Equity and Long-Term Incentive Plans (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Adjustments Related to Tax Withholding for Share-based Compensation $ 22,192,000us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation $ 12,135,000us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation $ 15,989,000us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period 6,503us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized 55,735,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 3 years 6 months    
Excess tax benefits from share-based compensation arrangements 6,798,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 4,975,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 7,484,000us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Other Labor-related Expenses 19,795,000us-gaap_OtherLaborRelatedExpenses 17,516,000us-gaap_OtherLaborRelatedExpenses 11,001,000us-gaap_OtherLaborRelatedExpenses
Other Employee Related Liabilities 34,430,000us-gaap_OtherEmployeeRelatedLiabilitiesCurrentAndNoncurrent 29,047,000us-gaap_OtherEmployeeRelatedLiabilitiesCurrentAndNoncurrent  
Common Class A [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 698,718us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
   
Shares Paid for Tax Withholding for Share Based Compensation 305,321us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
   
Adjustments Related to Tax Withholding for Share-based Compensation $ 22,192,000us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
   
Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 5,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 1,302,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
   
Employee Stock [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 841,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Employee Stock [Member] | Restricted Stock Units (RSUs) [Member] | Share-based Compensation Award, Tranche One [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 418,738us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheOneMember
   
Employee Stock [Member] | Restricted Stock Units (RSUs) [Member] | Share-based Compensation Award, Tranche Two [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 68,505us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheTwoMember
   
Employee Stock [Member] | Restricted Stock Units (RSUs) [Member] | Share-based Compensation Award, Tranche Three [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 353,757us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_PlanNameAxis
= us-gaap_EmployeeStockMember
/ us-gaap_VestingAxis
= us-gaap_ShareBasedCompensationAwardTrancheThreeMember
   
Employee Stock [Member] | Common Class A [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Non-Employee Director Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 465,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= amcx_NonEmployeeDirectorPlanMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 271,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= amcx_NonEmployeeDirectorPlanMember
   
Non-Employee Director Plan [Member] | Common Class A [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years