Goodwill and Other Intangible Assets - Composition of Company's Acquired Intangible Assets and Associated Accumulated Amortization (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	$ 94,890	$ 94,890
Accumulated Amortization	78,234	74,697
Net Carrying Amount	16,656	20,193
Intangible assets not subject to amortization:
Total intangible assets	237,357	240,894
FCC
Intangible assets not subject to amortization:
Licenses	$ 220,701	220,701
Television network affiliation agreements
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	6 years
Gross Carrying Amount	$ 65,089	65,089
Accumulated Amortization	51,172	48,851
Net Carrying Amount	$ 13,917	16,238
Customer base
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	2 years
Gross Carrying Amount	$ 3,146	3,146
Accumulated Amortization	1,789	935
Net Carrying Amount	$ 1,357	2,211
Other
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	10 years
Gross Carrying Amount	$ 26,655	26,655
Accumulated Amortization	25,273	24,911
Net Carrying Amount	$ 1,382	$ 1,744