CONTINGENCIES AND COMMITMENTS - Narrative (Details)	12 Months Ended
Dec. 31, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Legal forfeiture	$ 419,353
Legal forfeiture maximum	$ 3,870,946

FCC fine for a single incidence related to legal proceedings.

No definition available.

Name:	etm_LegalForfeitureForSingleIncidence
Namespace Prefix:	etm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration