Goodwill and Other Intangible Assets - Composition of Company's Acquired Intangible Assets and Associated Accumulated Amortization (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	$ 91,490	$ 91,490
Accumulated Amortization	71,678	69,141
Net Carrying Amount	19,812	22,349
Intangible assets not subject to amortization:
FCC licenses	220,701	220,701
Total intangible assets	220,701	220,701
Television network affiliation agreements [Member]
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	8 years
Gross Carrying Amount	65,089	65,089
Accumulated Amortization	46,530	44,210
Net Carrying Amount	18,559	20,879
Customer base [Member]
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	3 years
Gross Carrying Amount	746	746
Accumulated Amortization	473	382
Net Carrying Amount	273	364
Other [Member]
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	18 years
Gross Carrying Amount	25,655	25,655
Accumulated Amortization	24,675	24,549
Net Carrying Amount	$ 980	$ 1,106