FAIR VALUE OF FINANCIAL INSTRUMENTS - Recurring basis (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Fair Value, Inputs, Level 1 [Member]
Liabilities
Deferred Compensation	$ 12,097	$ 10,875

Deferred compensation liability, which is included in other long-term liabilities, is recorded at fair value on a recurring basis. The unfunded plan allows participants to hypothetically invest in various specified investment options such as equity funds, stock funds, capital appreciation funds, money market funds, bond funds, mid-cap value funds and growth funds. The non-qualified deferred compensation plan liability is valued based on quoted market prices of the underlying investments.

No definition available.

Name:	etm_DeferredCompensationLiabilityFairValueDisclosure
Namespace Prefix:	etm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant