REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 3,910,895	$ 3,556,906	$ 2,946,124
Revenue from leases	1,388	1,434	2,094
Revenue, total	3,912,283	3,558,340	2,948,218
Broadcast Radio
Disaggregation of Revenue [Line Items]
Revenues	1,887,433	1,812,252	1,604,880
Networks
Disaggregation of Revenue [Line Items]
Revenues	503,244	503,052	484,950
Sponsorship and Events
Disaggregation of Revenue [Line Items]
Revenues	188,985	160,322	107,654
Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Revenues	658,154	576,073	372,687
Podcast
Disaggregation of Revenue [Line Items]
Revenues	358,432	252,564	101,684
Audio & Media Services
Disaggregation of Revenue [Line Items]
Revenues	298,954	241,355	267,663
Other
Disaggregation of Revenue [Line Items]
Revenues	15,693	11,288	6,606
Operating Segments \| Multiplatform Group
Disaggregation of Revenue [Line Items]
Revenues	2,595,802	2,487,584	2,204,760
Revenue from leases	1,388	1,434	2,094
Revenue, total	2,597,190	2,489,018	2,206,854
Operating Segments \| Multiplatform Group \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Revenues	1,887,433	1,812,252	1,604,880
Operating Segments \| Multiplatform Group \| Networks
Disaggregation of Revenue [Line Items]
Revenues	503,244	503,052	484,950
Operating Segments \| Multiplatform Group \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Revenues	188,985	160,322	107,654
Operating Segments \| Multiplatform Group \| Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Multiplatform Group \| Podcast
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Multiplatform Group \| Audio & Media Services
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Multiplatform Group \| Other
Disaggregation of Revenue [Line Items]
Revenues	16,140	11,958	7,276
Operating Segments \| Digital Audio Group
Disaggregation of Revenue [Line Items]
Revenues	1,021,824	834,482	474,371
Revenue from leases	0	0	0
Revenue, total	1,021,824	834,482	474,371
Operating Segments \| Digital Audio Group \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Digital Audio Group \| Networks
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Digital Audio Group \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Digital Audio Group \| Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Revenues	663,392	581,918	372,687
Operating Segments \| Digital Audio Group \| Podcast
Disaggregation of Revenue [Line Items]
Revenues	358,432	252,564	101,684
Operating Segments \| Digital Audio Group \| Audio & Media Services
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Digital Audio Group \| Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Audio & Media Services Group
Disaggregation of Revenue [Line Items]
Revenues	304,302	247,957	274,749
Revenue from leases	0	0
Revenue, total	304,302	247,957	274,749
Operating Segments \| Audio & Media Services Group \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Audio & Media Services Group \| Networks
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Audio & Media Services Group \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Audio & Media Services Group \| Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Audio & Media Services Group \| Podcast
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments \| Audio & Media Services Group \| Audio & Media Services
Disaggregation of Revenue [Line Items]
Revenues	304,302	247,957	274,749
Operating Segments \| Audio & Media Services Group \| Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Revenues	(11,033)	(13,117)	(7,756)
Revenue from leases	0	0
Revenue, total	(11,033)	(13,117)	(7,756)
Consolidation, Eliminations \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Consolidation, Eliminations \| Networks
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Consolidation, Eliminations \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Consolidation, Eliminations \| Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Revenues	(5,238)	(5,845)	0
Consolidation, Eliminations \| Podcast
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Consolidation, Eliminations \| Audio & Media Services
Disaggregation of Revenue [Line Items]
Revenues	(5,348)	(6,602)	(7,086)
Consolidation, Eliminations \| Other
Disaggregation of Revenue [Line Items]
Revenues	$ (447)	$ (670)	$ (670)