REVENUE - Disaggregation of Revenue (Details) - 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 from contracts with customers	$ 952,753	$ 988,512	$ 2,682,867	$ 2,785,320
Revenue from leases	236	418	1,375	1,073
Revenue, total	952,989	988,930	2,684,242	2,786,393
Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	455,103	484,812	1,267,493	1,362,601
Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	116,334	127,239	346,456	372,329
Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	49,500	42,562	120,297	114,226
Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	163,337	161,386	471,664	471,295
Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	102,663	91,253	276,181	245,479
Audio and Media Services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	60,606	76,507	185,057	205,710
Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5,210	4,753	15,719	13,680
Operating segments \| Multiplatform Group
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	626,147	659,478	1,749,965	1,863,283
Revenue from leases	236	418	1,375	1,073
Revenue, total	626,383	659,896	1,751,340	1,864,356
Operating segments \| Multiplatform Group \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	455,103	484,812	1,267,493	1,362,601
Operating segments \| Multiplatform Group \| Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	116,334	127,239	346,456	372,329
Operating segments \| Multiplatform Group \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	49,500	42,562	120,297	114,226
Operating segments \| Multiplatform Group \| Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Multiplatform Group \| Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Multiplatform Group \| Audio and Media Services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Multiplatform Group \| Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5,210	4,865	15,719	14,127
Operating segments \| Digital Audio Group
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	267,222	253,953	751,472	720,733
Revenue from leases	0		0	0
Revenue, total	267,222	253,953	751,472	720,733
Operating segments \| Digital Audio Group \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Digital Audio Group \| Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Digital Audio Group \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Digital Audio Group \| Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	164,559	162,700	475,291	475,254
Operating segments \| Digital Audio Group \| Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	102,663	91,253	276,181	245,479
Operating segments \| Digital Audio Group \| Audio and Media Services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Digital Audio Group \| Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Audio & Media Services Group
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	61,979	77,794	189,134	209,716
Revenue from leases	0		0	0
Revenue, total	61,979	77,794	189,134	209,716
Operating segments \| Audio & Media Services Group \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Audio & Media Services Group \| Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Audio & Media Services Group \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Audio & Media Services Group \| Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Audio & Media Services Group \| Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Operating segments \| Audio & Media Services Group \| Audio and Media Services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	61,979	77,794	189,134	209,716
Operating segments \| Audio & Media Services Group \| Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Eliminations
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(2,595)	(2,713)	(7,704)	(8,412)
Revenue from leases	0		0	0
Revenue, total	(2,595)	(2,713)	(7,704)	(8,412)
Eliminations \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Eliminations \| Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Eliminations \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Eliminations \| Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(1,222)	(1,314)	(3,627)	(3,959)
Eliminations \| Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	0	0	0	0
Eliminations \| Audio and Media Services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	(1,373)	(1,287)	(4,077)	(4,006)
Eliminations \| Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 0	$ (112)	$ 0	$ (447)