Goodwill and Other Intangible Assets (Schedule Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Goodwill [Line Items]
Goodwill	$ 79,305	$ 83,173
AMC [Member]
Goodwill [Line Items]
Goodwill	34,251	34,251
WE tv [Member]
Goodwill [Line Items]
Goodwill	5,214	5,214
IFC [Member]
Goodwill [Line Items]
Goodwill	13,582	13,582
Sundance Channel [Member]
Goodwill [Line Items]
Goodwill	25,062	28,930
National Networks [Member]
Goodwill [Line Items]
Goodwill	78,109	81,977
AMC Networks Broadcasting Technology [Member]
Goodwill [Line Items]
Goodwill	1,196	1,196
International And Other [Member]
Goodwill [Line Items]
Goodwill	$ 1,196	$ 1,196