Revenues - Summary of Disaggregation of Broadcast Advertising Revenue by Sales Channel (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation Of Revenue [Line Items]
Total revenue	$ 273,381	$ 221,695	$ 512,387	$ 418,867
Advertising
Disaggregation Of Revenue [Line Items]
Total revenue	30,983	35,347	60,610	66,804
Advertising | Local Direct
Disaggregation Of Revenue [Line Items]
Total revenue	5,480	6,009	10,788	11,430
Advertising | Local Agency
Disaggregation Of Revenue [Line Items]
Total revenue	13,687	13,017	26,559	25,570
Advertising | National Agency
Disaggregation Of Revenue [Line Items]
Total revenue	$ 11,816	$ 16,321	$ 23,263	$ 29,804