SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended							6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021
Net revenue	$ 121,250	$ 118,657	$ 112,131	$ 130,475	$ 111,234	$ 107,365	$ 91,211	$ 230,788	$ 198,576	$ 352,038	$ 309,810	$ 484,604	$ 440,285
Radio advertising
Net revenue												177,268	165,244
Political advertising
Net revenue												13,226	3,494
Digital advertising
Net revenue												76,730	59,812
Cable television advertising
Net revenue												112,857	95,589
Cable television affiliate fees
Net revenue												96,963	101,203
Event revenues & other
Net revenue												$ 7,560	$ 14,943