Goodwill and Other Intangible Assets (Schedule Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill	$ 77,387	$ 79,305
National Networks [Member]
Goodwill [Line Items]
Goodwill	76,191	78,109
International And Other [Member]
Goodwill [Line Items]
Goodwill	1,196	1,196
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	23,144	25,062
AMC Networks Broadcasting Technology [Member]
Goodwill [Line Items]
Goodwill	$ 1,196	$ 1,196