REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 919,185	$ 953,640	$ 1,730,114	$ 1,796,808
Revenue from leases	829	365	1,139	655
Revenue, total	920,014	954,005	1,731,253	1,797,463
Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	429,152	462,547	812,390	877,789
Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	122,168	127,532	230,122	245,090
Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	38,210	38,064	70,797	71,665
Digital, excluding Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	162,931	165,504	308,327	309,910
Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	96,707	85,681	173,518	154,225
Audio and Media Services
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	64,432	69,687	124,451	129,203
Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	5,585	4,625	10,509	8,926
Operating segments \| Multiplatform Group
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	595,115	632,935	1,123,818	1,203,805
Revenue from leases	829	365	1,139	655
Revenue, total	595,944	633,300	1,124,957	1,204,460
Operating segments \| Multiplatform Group \| Broadcast Radio
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	429,152	462,547	812,390	877,789
Operating segments \| Multiplatform Group \| Networks
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	122,168	127,532	230,122	245,090
Operating segments \| Multiplatform Group \| Sponsorship and Events
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	38,210	38,064	70,797	71,665
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	5,585	4,792	10,509	9,261
Operating segments \| Digital Audio Group
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	260,854	252,561	484,250	466,780
Revenue from leases	0		0	0
Revenue, total	260,854	252,561	484,250	466,780
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	164,147	166,880	310,732	312,555
Operating segments \| Digital Audio Group \| Podcast
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	96,707	85,681	173,518	154,225
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	65,804	71,065	127,155	131,922
Revenue from leases	0		0	0
Revenue, total	65,804	71,065	127,155	131,922
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	65,804	71,065	127,155	131,922
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	(2,588)	(2,921)	(5,109)	(5,699)
Revenue from leases	0		0	0
Revenue, total	(2,588)	(2,921)	(5,109)	(5,699)
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	(1,216)	(1,376)	(2,405)	(2,645)
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	(1,372)	(1,378)	(2,704)	(2,719)
Eliminations \| Other
Disaggregation of Revenue [Line Items]
Total revenue from contracts with customers	$ 0	$ (167)	$ 0	$ (335)