Goodwill and Other Intangible Assets - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2021 USD ($) License Segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Oct. 01, 2021 USD ($)
Goodwill [Line Items]
Aggregate amortization expense	$ 8,900,000	$ 4,000,000.0	$ 6,000,000.0
Number of reporting segments | Segment	3
Impairment of goodwill		800,000
Goodwill	$ 71,708,000	58,043,000	46,511,000
Digital
Goodwill [Line Items]
Impairment of goodwill	0	800,000
Goodwill	$ 31,159,000	17,494,000	5,962,000	$ 28,200,000
Goodwill, impaired, method for fair value determination	The Company conducted its annual review of the fair value of the digital reporting unit. As of the annual goodwill testing date, October 1, 2021, there was $28.2 million of goodwill in the digital reporting unit. Based on the assumptions and estimates in Note 2, the fair value of the digital reporting unit exceeded its carrying value by 237%, resulting in no impairment charge. The calculation of the fair value of the digital reporting unit requires estimates of the discount rate and the long term projected growth rate. If that discount rate were to increase by 1%, the fair value of the digital reporting unit would decrease by 8%. If the long term projected growth rate were to decrease by 0.5%, the fair value of the digital reporting unit would decrease by 2%.
Percentage of fair value of assets	237.00%
Impairment charges related to intangible subject to amortization	$ 1,300,000	5,300,000
Impairment charges related to property and equipment		1,500,000
Television
Goodwill [Line Items]
Impairment of goodwill	0	0
Goodwill	$ 40,549,000	40,549,000	40,549,000	$ 40,500,000
Goodwill, impaired, method for fair value determination	the television reporting unit fair value exceeded its carrying value by 44%, resulting in no impairment charge in 2021. The calculation of the fair value of the reporting unit requires estimates of the discount rate and the long term projected growth rate. If that discount rate were to increase by 0.5%, the fair value of the television reporting unit would decrease by 6%. If the long term projected growth rate were to decrease by 0.5%, the fair value of the television reporting unit would decrease by 4%.
Percentage of fair value of assets	44.00%
Impairment charges related to intangible subject to amortization	$ 300,000
Television | FCC Licenses
Goodwill [Line Items]
Impairment charge related to indefinite life intangible assets		23,500,000
Audio
Goodwill [Line Items]
Goodwill	0	0	$ 0
Impairment charges related to intangible subject to amortization	$ 1,300,000
Audio | FCC Licenses
Goodwill [Line Items]
Number of licenses exceeds fair value | License	1
Impairment charge related to indefinite life intangible assets	$ 100,000	$ 9,000,000.0