v3.8.0.1

PERPETUAL CUMULATIVE CONVERTIBALE PREFERRED STOCK (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
PreferredStockIncludingAdditionalPaidInCapitalAbstract |
Schedule Of Preferred Stock [Table Text Block] |
|  |  | December 31,
|  |  | 2017 |  | 2016
|  |  | (amounts in thousands, except
|  |  | shares)
Perpetual cumulative convertible preferred stock $0.01 par value |  |  |  |  |
| Shares issued and outstanding |  | - |  |  | 11
| Aggregate liquidation preference | $ | - |  | $ | 27,500
| Less stock issuance costs |  | - |  |  | (220)
| Plus accrued dividend as of the end of period |  | - |  |  | 452
| Net carrying value | $ | - |  | $ | 27,732

X
- References No definition available. + Details
Name: | etm_ScheduleOfPreferredStockTableTextBlock
Namespace Prefix: | etm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_PreferredStockIncludingAdditionalPaidInCapitalAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration