Goodwill and Other Intangible Assets (Summary Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount of Amortizable Intangible Assets	$ 915,649	$ 915,649
Accumulated amortization	(706,888)	(694,366)
Amortizable intangible assets, net of accumulated amortization	208,761	221,283
Trademarks	19,900	19,900
Intangible Assets, Gross, Excluding Goodwill	935,549	935,549
Total intangible assets, net	228,661	241,183
Affiliation Agreements And Affiliate Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount of Amortizable Intangible Assets	840,757	840,757
Accumulated amortization	(634,255)	(623,621)
Amortizable intangible assets, net of accumulated amortization	206,502	217,136
Advertiser Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount of Amortizable Intangible Assets	74,248	74,248
Accumulated amortization	(72,082)	(70,226)
Amortizable intangible assets, net of accumulated amortization	2,166	4,022
Other Amortizable Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount of Amortizable Intangible Assets	644	644
Accumulated amortization	(551)	(519)
Amortizable intangible assets, net of accumulated amortization	$ 93	$ 125