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Revenues - Summary of Disaggregation of Broadcast Advertising Revenue by Sales Channel (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Total revenue	$ 364,948	$ 297,043	$ 323,990
Advertising
Disaggregation Of Revenue [Line Items]
Total revenue	143,515	124,722	161,713
Advertising | Local Direct
Disaggregation Of Revenue [Line Items]
Total revenue	20,798	21,826	22,931
Advertising | Local Agency
Disaggregation Of Revenue [Line Items]
Total revenue	51,001	54,485	54,094
Advertising | National Agency
Disaggregation Of Revenue [Line Items]
Total revenue	$ 71,716	$ 48,411	$ 84,688

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