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Restructuring (Expense by Segment) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges $ 15,715us-gaap_RestructuringCharges $ 0us-gaap_RestructuringCharges $ (3)us-gaap_RestructuringCharges
National Networks [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges 3,664us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= amcx_NationalNetworksMember
   
International And Other [Member]      
Restructuring Cost and Reserve [Line Items]      
Restructuring Charges $ 12,051us-gaap_RestructuringCharges
/ us-gaap_StatementBusinessSegmentsAxis
= amcx_InternationalAndOtherMember