REVENUE - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
May 01, 2019	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 1,072,775	$ 2,608,862	$ 3,556,906	$ 2,946,124
Revenue from leases(8)	696	1,194	1,434	2,094
Revenue, total	1,073,471	2,610,056	3,558,340	2,948,218
Broadcast Radio(1)
Disaggregation of Revenue [Line Items]
Revenues	657,864	1,575,382	1,812,252	1,604,880
Networks(2)
Disaggregation of Revenue [Line Items]
Revenues	189,088	425,631	503,052	484,950
Sponsorship and Events(3)
Disaggregation of Revenue [Line Items]
Revenues	50,330	159,187	160,322	107,654
Digital, excluding Podcast(4)
Disaggregation of Revenue [Line Items]
Revenues	91,695	231,160	576,073	372,687
Podcast(5)
Disaggregation of Revenue [Line Items]
Revenues	11,094	42,229	252,564	101,684
Audio and Media Services(6)
Disaggregation of Revenue [Line Items]
Revenues	67,037	162,703	241,355	267,663
Other(7)
Disaggregation of Revenue [Line Items]
Revenues	5,667	12,570	11,288	6,606
Operating Segments \| Multiplatform Group
Disaggregation of Revenue [Line Items]
Revenues	903,192	2,173,217	2,487,584	2,204,760
Revenue from leases(8)	696	1,194	1,434	2,094
Revenue, total	903,888	2,174,411	2,489,018	2,206,854
Operating Segments \| Multiplatform Group \| Broadcast Radio(1)
Disaggregation of Revenue [Line Items]
Revenues	657,864	1,575,382	1,812,252	1,604,880
Operating Segments \| Multiplatform Group \| Networks(2)
Disaggregation of Revenue [Line Items]
Revenues	189,088	425,631	503,052	484,950
Operating Segments \| Multiplatform Group \| Sponsorship and Events(3)
Disaggregation of Revenue [Line Items]
Revenues	50,330	159,187	160,322	107,654
Operating Segments \| Multiplatform Group \| Digital, excluding Podcast(4)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Multiplatform Group \| Podcast(5)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Multiplatform Group \| Audio and Media Services(6)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Multiplatform Group \| Other(7)
Disaggregation of Revenue [Line Items]
Revenues	5,910	13,017	11,958	7,276
Operating Segments \| Digital Audio Group
Disaggregation of Revenue [Line Items]
Revenues	102,789	273,389	834,482	474,371
Revenue from leases(8)	0	0	0	0
Revenue, total	102,789	273,389	834,482	474,371
Operating Segments \| Digital Audio Group \| Broadcast Radio(1)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Digital Audio Group \| Networks(2)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Digital Audio Group \| Sponsorship and Events(3)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Digital Audio Group \| Digital, excluding Podcast(4)
Disaggregation of Revenue [Line Items]
Revenues	91,695	231,160	581,918	372,687
Operating Segments \| Digital Audio Group \| Podcast(5)
Disaggregation of Revenue [Line Items]
Revenues	11,094	42,229	252,564	101,684
Operating Segments \| Digital Audio Group \| Audio and Media Services(6)
Disaggregation of Revenue [Line Items]
Revenues	0		0	0
Operating Segments \| Digital Audio Group \| Other(7)
Disaggregation of Revenue [Line Items]
Revenues	0		0	0
Operating Segments \| Audio & Media Services Group
Disaggregation of Revenue [Line Items]
Revenues	69,362	167,292	247,957	274,749
Revenue from leases(8)	0	0	0	0
Revenue, total	69,362	167,292	247,957	274,749
Operating Segments \| Audio & Media Services Group \| Broadcast Radio(1)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Audio & Media Services Group \| Networks(2)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Audio & Media Services Group \| Sponsorship and Events(3)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Audio & Media Services Group \| Digital, excluding Podcast(4)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Audio & Media Services Group \| Podcast(5)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Operating Segments \| Audio & Media Services Group \| Audio and Media Services(6)
Disaggregation of Revenue [Line Items]
Revenues	69,362	167,292	247,957	274,749
Operating Segments \| Audio & Media Services Group \| Other(7)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Consolidation, Eliminations
Disaggregation of Revenue [Line Items]
Revenues	(2,568)	(5,036)	(13,117)	(7,756)
Revenue from leases(8)	0	0	0	0
Revenue, total	(2,568)	(5,036)	(13,117)	(7,756)
Consolidation, Eliminations \| Broadcast Radio(1)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Consolidation, Eliminations \| Networks(2)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Consolidation, Eliminations \| Sponsorship and Events(3)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Consolidation, Eliminations \| Digital, excluding Podcast(4)
Disaggregation of Revenue [Line Items]
Revenues	0	0	(5,845)	0
Consolidation, Eliminations \| Podcast(5)
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Consolidation, Eliminations \| Audio and Media Services(6)
Disaggregation of Revenue [Line Items]
Revenues	(2,325)	(4,589)	(6,602)	(7,086)
Consolidation, Eliminations \| Other(7)
Disaggregation of Revenue [Line Items]
Revenues	$ (243)	$ (447)	$ (670)	$ (670)