v3.10.0.1

ASSETS HELD FOR SALE (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 411,375 | $ 378,508 | $ 372,124 | $ 300,560 | $ 246,614 | $ 122,299 | $ 124,970 | $ 99,001 | $ 1,462,567 | $ 592,884 | $ 464,771
Net Revenues |  |  |  |  |  |  |  |  | 0 | 5,494 | 0
Station operating expenses |  |  |  |  |  |  |  |  | 0 | 4,749 | 0
Depreciation and amortization |  |  |  |  |  |  |  |  | 0 | 9 | 0
TBA income |  |  |  |  |  |  |  |  | 1,765 | 652 | 0
Total Operating Expenses |  |  |  |  |  |  |  |  | 0 | 4,106 | 0
Income before taxes |  |  |  |  |  |  |  |  | 1,765 | 1,388 | 0
Tax Expense attributable to Discontinued Operations |  |  |  |  |  |  |  |  | 613 | 552 | 0
Income from Discontinued Operations, Net of Tax |  |  |  |  |  |  |  |  | 1,152 | 836 | $ 0
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property, Plant and Equipment, Gross | 459,613 |  |  |  | 461,131 |  |  |  | 459,613 | 461,131 |
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | 158,341 |  |  |  | 132,209 |  |  |  | 158,341 | 132,209 |
Property Plant And Equipment Net | 317,030 |  |  |  | 346,507 |  |  |  | 317,030 | 346,507 |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Net Assets Held for Sale | 19,603 |  |  |  | 212,320 |  |  |  | 19,603 | 212,320 |
Goodwill | 539,469 |  |  |  | 862,000 |  |  |  | 539,469 | 862,000 |
IntangibleAssetsNetIncludingGoodwill | 0 |  |  |  | 160,534 |  |  |  | 0 | 160,534 |
BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Assets Held-for-sale, at Carrying Value1 [Abstract] |  |  |  |  |  |  |  |  |  |  |
ProceedsFromDivestitureOfBusinesses |  |  |  |  |  |  |  |  | 140,300 |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Net Assets Held for Sale | 0 |  |  |  | 165,870 |  |  |  | 0 | 165,870 |
ProceedsFromDivestitureOfBusinesses |  |  |  |  |  |  |  |  | 140,300 |  |
Gain Loss On Sale Of Business |  |  |  |  |  |  |  |  | 200 |  |
IntangibleAssetsNetIncludingGoodwill | 0 |  |  |  | 160,534 |  |  |  | 0 | 160,534 |
OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Net Assets Held for Sale | 19,603 |  |  |  | 46,450 |  |  |  | 19,603 | 46,450 |
IntangibleAssetsNetIncludingGoodwill | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Other Miscellaneous markets [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Assets Held for Sale | 23,500 |  |  |  |  |  |  |  | 23,500 |  |
ChicagoLandSale [Member] |  |  |  |  |  |  |  |  |  |  |
Assets Held-for-sale, at Carrying Value1 [Abstract] |  |  |  |  |  |  |  |  |  |  |
ProceedsFromDivestitureOfBusinesses |  |  |  |  |  |  |  |  | 46,000 |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
ProceedsFromDivestitureOfBusinesses |  |  |  |  |  |  |  |  | 46,000 |  |
Gain Loss On Sale Of Business |  |  |  |  |  |  |  |  | 100 |  |
SanDiegoAndLosAngelesSale [Member] |  |  |  |  |  |  |  |  |  |  |
Assets Held-for-sale, at Carrying Value1 [Abstract] |  |  |  |  |  |  |  |  |  |  |
ProceedsFromDivestitureOfBusinesses |  |  |  |  |  |  |  |  | 27,200 |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
ProceedsFromDivestitureOfBusinesses |  |  |  |  |  |  |  |  | 27,200 |  |
Gain Loss On Sale Of Business |  |  |  |  |  |  |  |  | 6,400 |  |
Austin Dallas and Sacramento Sale [Member] |  |  |  |  |  |  |  |  |  |  |
Assets Held-for-sale, at Carrying Value1 [Abstract] |  |  |  |  |  |  |  |  |  |  |
ProceedsFromDivestitureOfBusinesses |  |  |  |  |  |  |  |  | 3,900 |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
ProceedsFromDivestitureOfBusinesses |  |  |  |  |  |  |  |  | 3,900 |  |
Gain Loss On Sale Of Business |  |  |  |  |  |  |  |  | 300 |  |
Land and Land Improvements [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 2,645 |  |  |  | 47,110 |  |  |  | 2,645 | 47,110 |
Land and Land Improvements [Member] | BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 0 |  |  |  | 1,110 |  |  |  | 0 | 1,110 |
Land and Land Improvements [Member] | OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 2,645 |  |  |  | 46,000 |  |  |  | 2,645 | 46,000 |
Building [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 1,053 |  |  |  | 1,970 |  |  |  | 1,053 | 1,970 |
Building [Member] | BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 0 |  |  |  | 1,520 |  |  |  | 0 | 1,520 |
Building [Member] | OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 1,053 |  |  |  | 450 |  |  |  | 1,053 | 450 |
Leasehold improvements [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 0 |  |  |  | 88 |  |  |  | 0 | 88 |
Leasehold improvements [Member] | BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 0 |  |  |  | 88 |  |  |  | 0 | 88 |
Leasehold improvements [Member] | OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Equipment [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 15,905 |  |  |  | 2,618 |  |  |  | 15,905 | 2,618 |
Equipment [Member] | BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 0 |  |  |  | 2,618 |  |  |  | 0 | 2,618 |
Equipment [Member] | OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 15,905 |  |  |  | 0 |  |  |  | 15,905 | 0 |
Property Plant and Equipment Net Member [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 19,603 |  |  |  | 51,786 |  |  |  | 19,603 | 51,786 |
Property Plant and Equipment Net Member [Member] | BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 0 |  |  |  | 5,336 |  |  |  | 0 | 5,336 |
Property Plant and Equipment Net Member [Member] | OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
Summary of the categories of property and equipment |  |  |  |  |  |  |  |  |  |  |
Property Plant And Equipment Net | 19,603 |  |  |  | 46,450 |  |  |  | 19,603 | 46,450 |
Radio Broadcasting Licences [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Radio broadcasting licenses | 0 |  |  |  | 136,014 |  |  |  | 0 | 136,014 |
Radio Broadcasting Licences [Member] | BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Radio broadcasting licenses | 0 |  |  |  | 136,014 |  |  |  | 0 | 136,014 |
Radio Broadcasting Licences [Member] | OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Radio broadcasting licenses | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Other Intangibles |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
OtherIntangibleAssetsNet | 0 |  |  |  | 1,947 |  |  |  | 0 | 1,947 |
Other Intangibles | BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
OtherIntangibleAssetsNet | 0 |  |  |  | 1,947 |  |  |  | 0 | 1,947 |
Other Intangibles | OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
OtherIntangibleAssetsNet | 0 |  |  |  | 0 |  |  |  | 0 | 0 |
Goodwill [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Goodwill | 0 |  |  |  | 22,573 |  |  |  | 0 | 22,573 |
Goodwill [Member] | BonnevilleTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Goodwill | 0 |  |  |  | 22,573 |  |  |  | 0 | 22,573 |
Goodwill [Member] | OtherTransactionMember [Member] |  |  |  |  |  |  |  |  |  |  |
IntangibleAssetsGrossExcludingGoodwillAbstract |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ 0 |  |  |  | $ 0 |  |  |  | $ 0 | $ 0 |

X
- References No definition available. + Details
Name: | etm_AssetsHeldForSale
Namespace Prefix: | etm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | etm_AssetsHeldForSaleAtCarryingValue1Abstract
Namespace Prefix: | etm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | etm_NetAssetsHeldForSale
Namespace Prefix: | etm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | etm_TotalOperatingExpenses
Namespace Prefix: | etm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after tax of income (loss) from operations classified as a discontinued operation. Excludes gain (loss) on disposal and provision for gain (loss) until disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721523-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 + Details
Name: | us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of tax expense (benefit) attributable to income (loss) from operations classified as a discontinued operation. Excludes tax expense (benefit) for gain (loss) on disposal and for provision for gain (loss) until disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=79507043&loc=d3e38679-109324 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721523-107759 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 + Details
Name: | us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of depreciation and amortization expense attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of operating expense attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of operating income (loss) attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of other income attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationOtherIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of revenue attributable to disposal group, including, but not limited to, discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gain (loss) from sale or disposal of an organization or integrated set of activities (for example, but not limited to, a partnership or corporation) engaged in providing a product or service in a commercial, industrial, or professional environment. + References No definition available. + Details
Name: | us-gaap_GainLossOnSaleOfBusiness
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
Name: | us-gaap_Goodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before accumulated amortization of intangible assets, excluding goodwill. + References No definition available. + Details
Name: | us-gaap_IntangibleAssetsGrossExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. + References No definition available. + Details
Name: | us-gaap_IntangibleAssetsNetIncludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated amortization of finite-lived and indefinite-lived intangible assets classified as other. + References No definition available. + Details
Name: | us-gaap_OtherIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_PropertyPlantAndEquipmentGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
Name: | us-gaap_PropertyPlantAndEquipmentNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
Name: | us-gaap_Revenues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=etm_BonnevilletransactionmemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=etm_OthertransactionmemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=etm_OtherMiscellaneousMarketsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=etm_ChicagolandsaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=etm_SandiegoandlosangelessaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=etm_AustinDallasAndSacramentoSaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_LandAndLandImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_EquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=etm_PropertyPlantAndEquipmentNetMemberMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_LicensingAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_OtherIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LongLivedAssetsHeldForSaleByAssetTypeAxis=us-gaap_GoodwillMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |