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Goodwill and Other Intangible Assets - Additional Information (Detail)	3 Months Ended		12 Months Ended
	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($) Segment License	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Oct. 01, 2019 USD ($)
Goodwill [Line Items]
Aggregate amortization expense			$ 6,000,000	$ 6,100,000	$ 5,900,000
Number of reporting segments \| Segment			3
Goodwill			$ 46,511,000	74,292,000	70,729,000
Impairment of goodwill			$ 27,714,000
FCC \| Mexico
Goodwill [Line Items]
Broadcast license period			20 years
Broadcast license expiration date			Dec. 31, 2021
Television
Goodwill [Line Items]
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 38%, resulting in no impairment charge in 2019. 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 5%.
Percentage of fair value of assets			38.00%
Impairment of goodwill			$ 0
Television \| FCC Licenses
Goodwill [Line Items]
Number of licenses exceeds fair value \| License			1
Impairment charge related to indefinite life intangible assets			$ 500,000
Television \| FCC
Goodwill [Line Items]
Impairment charge related to indefinite life intangible assets			3,500,000
Digital Media
Goodwill [Line Items]
Goodwill			$ 5,962,000	33,743,000	$ 30,180,000	$ 6,000,000
Goodwill, impaired, method for fair value determination			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 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%.
Impairment of goodwill	$ 5,300,000	$ 22,400,000	$ 27,714,000
Radio
Goodwill [Line Items]
Goodwill			$ 0	$ 0
Radio \| FCC Licenses
Goodwill [Line Items]
Number of licenses exceeds fair value \| License			1
Impairment charge related to indefinite life intangible assets			$ 200,000