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Debt (Narrative) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jan. 31, 2014
Jun. 30, 2011
Dec. 17, 2012
Dec. 16, 2013
Debt Instrument [Line Items]                
Write off of Deferred Debt Issuance Cost $ 0us-gaap_WriteOffOfDeferredDebtIssuanceCost $ (4,007,000)us-gaap_WriteOffOfDeferredDebtIssuanceCost $ (1,862,000)us-gaap_WriteOffOfDeferredDebtIssuanceCost          
Gains (Losses) on Extinguishment of Debt 0us-gaap_GainsLossesOnExtinguishmentOfDebt (1,087,000)us-gaap_GainsLossesOnExtinguishmentOfDebt (10,774,000)us-gaap_GainsLossesOnExtinguishmentOfDebt          
Debt Instrument, Unamortized Discount 20,434,000us-gaap_DebtInstrumentUnamortizedDiscount 22,817,000us-gaap_DebtInstrumentUnamortizedDiscount            
Unrealized Gain (Loss) on Derivatives 1,780,000us-gaap_UnrealizedGainLossOnDerivatives 4,313,000us-gaap_UnrealizedGainLossOnDerivatives (8,739,000)us-gaap_UnrealizedGainLossOnDerivatives          
Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Face Amount         500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember		      
Term-A Facility [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Face Amount         600,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= amcx_TermAFacilityMember		      
7.75% Senior Notes [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Face Amount           700,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= amcx_A775SeniorNotesMember		    
Payments of Debt Issuance Costs       1,533,000us-gaap_PaymentsOfDebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= amcx_A775SeniorNotesMember		        
Debt Instrument, Unamortized Discount           14,000,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= amcx_A775SeniorNotesMember		    
Debt Instrument, Interest Rate, Stated Percentage 7.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A775SeniorNotesMember		         7.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A775SeniorNotesMember		    
7.75% Senior Notes [Member] | On or After July 15, 2016 [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Redemption Price, Percentage 103.875%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A775SeniorNotesMember
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= amcx_OnOrAfterJuly152016Member		              
7.75% Senior Notes [Member] | Declining Rate After July 15, 2019 [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Redemption Price, Percentage 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A775SeniorNotesMember
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= amcx_DecliningRateAfterJuly152019Member		              
7.75% Senior Notes [Member] | Change of Control Percentage [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Redemption Price, Percentage 101.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A775SeniorNotesMember
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= amcx_ChangeofControlPercentageMember		              
4.75% Senior Notes [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Face Amount             600,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= amcx_A475SeniorNotesMember		  
Payments of Debt Issuance Costs     1,393,000us-gaap_PaymentsOfDebtIssuanceCosts
/ us-gaap_DebtInstrumentAxis
= amcx_A475SeniorNotesMember		          
Debt Instrument, Unamortized Discount             10,500,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_DebtInstrumentAxis
= amcx_A475SeniorNotesMember		  
Debt Instrument, Interest Rate, Stated Percentage 4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A475SeniorNotesMember		           4.75%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A475SeniorNotesMember		  
4.75% Senior Notes [Member] | Change of Control Percentage [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Redemption Price, Percentage 101.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A475SeniorNotesMember
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= amcx_ChangeofControlPercentageMember		              
4.75% Senior Notes [Member] | On or After December 15, 2017 [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Redemption Price, Percentage 102.375%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A475SeniorNotesMember
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= amcx_OnOrAfterDecember152017Member		              
4.75% Senior Notes [Member] | Declining Rate After December 15, 2020 [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Redemption Price, Percentage 100.00%us-gaap_DebtInstrumentRedemptionPricePercentage
/ us-gaap_DebtInstrumentAxis
= amcx_A475SeniorNotesMember
/ us-gaap_DebtInstrumentRedemptionPeriodAxis
= amcx_DecliningRateAfterDecember152020Member		              
Proceeds of 4.75% Senior Notes Used to Repay Term Loan B Facility [Member]                
Debt Instrument [Line Items]                
Repayments of Debt     587,600,000us-gaap_RepaymentsOfDebt
/ us-gaap_DebtInstrumentAxis
= amcx_ProceedsOf475SeniorNotesUsedToRepayTermLoanBFacilityMember		          
June 30, 2011 Credit Facility [Member]                
Debt Instrument [Line Items]                
Write off of Deferred Debt Issuance Cost   (3,719,000)us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember		            
June 30, 2011 Credit Facility [Member] | Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Face Amount           500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= us-gaap_RevolvingCreditFacilityMember		    
June 30, 2011 Credit Facility [Member] | Term-A Facility [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Face Amount           1,130,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermAFacilityMember		    
Debt Instrument, Unamortized Discount           5,650,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermAFacilityMember		    
June 30, 2011 Credit Facility [Member] | Term-B Facility [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Face Amount           595,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermBFacilityMember		    
Write off of Deferred Debt Issuance Cost     (898,000)us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermBFacilityMember		          
Gains (Losses) on Extinguishment of Debt     (10,774,000)us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermBFacilityMember		          
Debt Instrument, Unamortized Discount           12,986,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermBFacilityMember		    
Unrealized Gain (Loss) on Derivatives     (8,725,000)us-gaap_UnrealizedGainLossOnDerivatives
/ us-gaap_CreditFacilityAxis
= amcx_June302011CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermBFacilityMember		          
December 16, 2013 Credit Facility [Member]                
Debt Instrument [Line Items]                
Payments of Debt Issuance Costs 9,266,000us-gaap_PaymentsOfDebtIssuanceCosts
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		 12,669,000us-gaap_PaymentsOfDebtIssuanceCosts
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		            
Write off of Deferred Debt Issuance Cost   (288,000)us-gaap_WriteOffOfDeferredDebtIssuanceCost
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		            
Debt instrument, covenant, cash flow ratio 6.50amcx_DebtInstrumentCovenantCashFlowRatio
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		              
Debt Insturment, Covenant, Minimum Interest Coverage Ratio 2.50amcx_DebtInsturmentCovenantMinimumInterestCoverageRatio
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		              
December 16, 2013 Credit Facility [Member] | Eurodollar [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Interest Rate at Period End 1.91%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_VariableRateAxis
= us-gaap_EurodollarMember		              
December 16, 2013 Credit Facility [Member] | Minimum [Member]                
Debt Instrument [Line Items]                
Line of Credit Facility, Commitment Fee Percentage 0.25%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		              
December 16, 2013 Credit Facility [Member] | Minimum [Member] | Base Rate [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Basis Spread on Variable Rate 0.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember		              
December 16, 2013 Credit Facility [Member] | Minimum [Member] | Eurodollar [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Basis Spread on Variable Rate 1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_VariableRateAxis
= us-gaap_EurodollarMember		              
December 16, 2013 Credit Facility [Member] | Maximum [Member]                
Debt Instrument [Line Items]                
Line of Credit Facility, Commitment Fee Percentage 0.50%us-gaap_LineOfCreditFacilityCommitmentFeePercentage
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		              
December 16, 2013 Credit Facility [Member] | Maximum [Member] | Base Rate [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Basis Spread on Variable Rate 1.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_BaseRateMember		              
December 16, 2013 Credit Facility [Member] | Maximum [Member] | Eurodollar [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Basis Spread on Variable Rate 2.25%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_VariableRateAxis
= us-gaap_EurodollarMember		              
December 16, 2013 Credit Facility [Member] | Quarterly Installments Under Credit Agreement Term Loan A Facility from March 31, 2015 through December 31, 2015 [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Periodic Payment, Principal 18,500,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ amcx_ContractTermsAxis
= amcx_QuarterlyInstallmentsUnderTermLoanAFacilityfromMarch312015throughDecember312015Member
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		              
December 16, 2013 Credit Facility [Member] | Quarterly Installments Under Credit Agreement Term Loan A Facility from March 31, 2016 through December 31, 2016 [Member] [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Periodic Payment, Principal 37,000,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ amcx_ContractTermsAxis
= amcx_QuarterlyInstallmentsUnderCreditAgreementTermLoanAFacilityfromMarch312016throughDecember312016MemberMember
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		              
December 16, 2013 Credit Facility [Member] | Quarterly Installments Under Credit Agreement Term Loan A Facility from March 31, 2017 through December 31, 2017 [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Periodic Payment, Principal 55,500,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ amcx_ContractTermsAxis
= amcx_QuarterlyInstallmentsUnderCreditAgreementTermLoanAFacilityfromMarch312017throughDecember312017Member
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		              
December 16, 2013 Credit Facility [Member] | Quarterly Installment Under Credit Agreement Term Loan A Facility From March 31, 2018 through December 31, 2018 [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Periodic Payment, Principal 74,000,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ amcx_ContractTermsAxis
= amcx_QuarterlyInstallmentUnderCreditAgreementTermLoanAFacilityFromMarch312018throughSeptember302019Member
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		              
December 16, 2013 Credit Facility [Member] | Quarterly Installment Under Credit Agreement Term Loan A Facility Remainder December 16, 2019 [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Periodic Payment, Principal 518,000,000us-gaap_DebtInstrumentPeriodicPaymentPrincipal
/ amcx_ContractTermsAxis
= amcx_QuarterlyInstallmentUnderCreditAgreementTermLoanAFacilityRemainderDecember162019Member
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		              
December 16, 2013 Credit Facility [Member] | On or After January 1, 2016 [Member]                
Debt Instrument [Line Items]                
Debt instrument, covenant, cash flow ratio 6.00amcx_DebtInstrumentCovenantCashFlowRatio
/ amcx_ContractTermsAxis
= amcx_OnorAfterJanuary12016Member
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember		              
December 16, 2013 Credit Facility [Member] | Term-A Facility [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Face Amount         $ 600,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermAFacilityMember		     $ 880,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_CreditFacilityAxis
= amcx_December162013CreditFacilityMember
/ us-gaap_DebtInstrumentAxis
= amcx_TermAFacilityMember