Revenues - Summary of Revenues Disaggregated by Major Source (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 221,695	$ 178,410	$ 418,867	$ 327,290
Digital Advertising
Disaggregation Of Revenue [Line Items]
Total revenue	174,378	130,223	328,089	231,705
Broadcast Advertising
Disaggregation Of Revenue [Line Items]
Total revenue	35,347	36,438	66,804	70,113
Spectrum Usage Rights
Disaggregation Of Revenue [Line Items]
Total revenue	1,674	1,109	3,209	3,953
Retransmission Consent
Disaggregation Of Revenue [Line Items]
Total revenue	9,038	9,286	18,233	18,933
Other
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,258	$ 1,354	$ 2,532	$ 2,586