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Revenues - Summary of Disaggregation of Broadcast Advertising Revenue by Sales Channel (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation Of Revenue [Line Items]
Total revenue	$ 82,654	$ 73,719	$ 160,830	$ 141,366
Advertising
Disaggregation Of Revenue [Line Items]
Total revenue	29,857	30,983	57,694	60,610
Advertising | Local Direct
Disaggregation Of Revenue [Line Items]
Total revenue	5,109	5,480	10,144	10,788
Advertising | Local Agency
Disaggregation Of Revenue [Line Items]
Total revenue	13,124	13,687	26,027	26,559
Advertising | National Agency
Disaggregation Of Revenue [Line Items]
Total revenue	$ 11,624	$ 11,816	$ 21,523	$ 23,263

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