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Revenues - Summary of Disaggregation of Broadcast Advertising Revenue by Sales Channel (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation Of Revenue [Line Items]
Total revenue	$ 120,630	$ 97,156	$ 313,216	$ 257,986
Advertising
Disaggregation Of Revenue [Line Items]
Total revenue	25,496	39,998	76,237	97,692
Advertising | Local Direct
Disaggregation Of Revenue [Line Items]
Total revenue	4,712	5,042	14,401	15,186
Advertising | Local Agency
Disaggregation Of Revenue [Line Items]
Total revenue	11,820	13,387	34,360	39,414
Advertising | National Agency
Disaggregation Of Revenue [Line Items]
Total revenue	$ 8,964	$ 21,569	$ 27,476	$ 43,092

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