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, 2022	Dec. 31, 2021
Schedule Of Intangible Assets [Line Items]
Gross Carrying Amount	$ 137,803	$ 168,721
Accumulated Amortization	75,992	104,687
Net Carrying Amount	61,811	64,034
Intangible assets not subject to amortization:
Total intangible assets	269,264	273,087
FCC Licenses and Spectrum Usage Rights
Intangible assets not subject to amortization:
Licenses	$ 207,453	209,053
Television network affiliation agreements
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	5 years
Gross Carrying Amount	$ 60,043	60,043
Accumulated Amortization	54,755	53,668
Net Carrying Amount	$ 5,288	6,375
Customer base
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	7 years
Gross Carrying Amount	$ 68,276	74,512
Accumulated Amortization	17,378	20,557
Net Carrying Amount	$ 50,898	53,955
Pre-sold advertising contracts and other
Schedule Of Intangible Assets [Line Items]
Weighted average remaining life in years	5 years
Gross Carrying Amount	$ 9,484	34,166
Accumulated Amortization	3,859	30,462
Net Carrying Amount	$ 5,625	$ 3,704