REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 988,512	$ 927,747	$ 2,785,320	$ 2,495,188
Revenue from leases	418	304	1,073	1,133
Revenue, total	988,930	928,051	2,786,393	2,496,321
Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	485,571	483,456	1,365,356	1,293,134
Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	127,239	127,920	372,329	366,592
Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	42,562	42,663	114,226	93,641
Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	161,386	140,098	471,295	400,729
Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	91,253	64,196	245,479	155,976
Audio and Media Services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	76,507	64,890	205,710	177,337
Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	3,994	4,524	10,925	7,779
Operating segments \| Multiplatform Group
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	659,478	658,675	1,863,283	1,761,593
Revenue from leases	418	304	1,073	1,133
Revenue, total	659,896	658,979	1,864,356	1,762,726
Operating segments \| Multiplatform Group \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	485,571	483,456	1,365,356	1,293,134
Operating segments \| Multiplatform Group \| Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	127,239	127,920	372,329	366,592
Operating segments \| Multiplatform Group \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	42,562	42,663	114,226	93,641
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	4,106	4,636	11,372	8,226
Operating segments \| Digital Audio Group
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	253,953	205,769	720,733	561,252
Revenue from leases	0	0	0	0
Revenue, total	253,953	205,769	720,733	561,252
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	162,700	141,573	475,254	405,276
Operating segments \| Digital Audio Group \| Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	91,253	64,196	245,479	155,976
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	77,794	66,078	209,716	182,390
Revenue from leases	0	0	0	0
Revenue, total	77,794	66,078	209,716	182,390
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	77,794	66,078	209,716	182,390
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	(2,713)	(2,775)	(8,412)	(10,047)
Revenue from leases	0	0	0	0
Revenue, total	(2,713)	(2,775)	(8,412)	(10,047)
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	(1,314)	(1,475)	(3,959)	(4,547)
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	(1,287)	(1,188)	(4,006)	(5,053)
Eliminations \| Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ (112)	$ (112)	$ (447)	$ (447)