Revenues - Disaggregated by Revenue Source (Details) - 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]
Net revenue	$ 236,741	$ 224,718	$ 468,773	$ 426,446
Total broadcast radio revenue
Disaggregation of Revenue [Line Items]
Net revenue	175,722	176,232	344,908	331,158
Spot
Disaggregation of Revenue [Line Items]
Net revenue	127,009	120,886	230,922	213,783
Network
Disaggregation of Revenue [Line Items]
Net revenue	48,713	55,346	113,986	117,375
Digital
Disaggregation of Revenue [Line Items]
Net revenue	37,801	31,422	69,694	58,501
Other
Disaggregation of Revenue [Line Items]
Net revenue	$ 23,218	$ 17,064	$ 54,171	$ 36,787