Revenues - Summary of Revenues Disaggregated by Major Source (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation Of Revenue [Line Items]
Total revenue	$ 274,417	$ 241,014	$ 786,804	$ 659,881
Digital Advertising
Disaggregation Of Revenue [Line Items]
Total revenue	231,487	188,877	657,865	516,966
Broadcast Advertising
Disaggregation Of Revenue [Line Items]
Total revenue	30,791	39,965	91,401	106,769
Spectrum Usage Rights
Disaggregation Of Revenue [Line Items]
Total revenue	2,086	1,584	6,310	4,793
Retransmission Consent
Disaggregation Of Revenue [Line Items]
Total revenue	8,925	8,926	27,872	27,159
Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,128	$ 1,662	$ 3,356	$ 4,194