Segment Information - Separate Financial Data for Each of Company's Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net revenue	$ 74,575	$ 334,555	$ 215,742	$ 462,574
Cost of revenue	13,240	22,041	35,249	32,555
Direct operating expenses	31,694	30,231	93,844	87,238
Selling, general and administrative expenses	12,398	12,813	38,365	36,043
Depreciation and amortization	4,094	4,337	12,052	12,460
Operating income (loss)	6,015	256,982	15,474	274,290
Corporate expenses	6,913	8,209	19,154	19,695
Change in fair value of contingent consideration	(114)		1,073
Foreign currency (gain) loss	335	(58)	531	293
Interest expense	(3,995)	(3,756)	(11,394)	(11,084)
Interest income	933	256	2,885	475
Dividend income	457		1,002
Other income (loss)	327		622
Income (loss) before income taxes	3,737	253,482	8,589	263,681
Capital expenditures	7,116	2,366	11,547	9,174
Total assets	$ 748,598	765,967	$ 748,598	765,967	$ 765,967
Percentage change in net revenue	(78.00%)		(53.00%)
Percentage change in cost of revenue	(40.00%)		8.00%
Percentage change in direct operating expenses	5.00%		8.00%
Percentage change in selling, general and administrative expenses	(3.00%)		6.00%
Percentage change in depreciation and amortization	(6.00%)		(3.00%)
Percentage change in segment operating profit (loss)	(95.00%)		(88.00%)
Percentage change in corporate expenses	(16.00%)		(3.00%)
Percentage change in foreign currency (gain) loss			81.00%
Percentage change in operating income (loss)	(98.00%)		(94.00%)
Percentage change in interest expense	6.00%		3.00%
Percentage change in interest income	264.00%		507.00%
Percentage change in income (loss) before income taxes	(99.00%)		(97.00%)
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 13,149	265,133	$ 36,232	294,278
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Corporate expenses	6,913	8,209	19,154	19,695
Television
Segment Reporting Information [Line Items]
Direct operating expenses	15,315	14,365	45,903	43,992
Selling, general and administrative expenses	5,147	5,796	16,670	16,524
Depreciation and amortization	2,227	2,489	6,708	7,452
Capital expenditures	6,819	1,863	10,841	7,815
Total assets	$ 538,177	556,942	$ 538,177	556,942
Percentage change in direct operating expenses	7.00%		4.00%
Percentage change in selling, general and administrative expenses	(11.00%)		1.00%
Percentage change in depreciation and amortization	(11.00%)		(10.00%)
Percentage change in segment operating profit (loss)	(95.00%)		(87.00%)
Television \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 13,672	265,709	$ 38,102	295,865
Radio
Segment Reporting Information [Line Items]
Direct operating expenses	10,402	11,306	32,011	33,362
Selling, general and administrative expenses	4,274	4,647	13,382	13,932
Depreciation and amortization	615	648	1,855	2,036
Capital expenditures	71	453	233	1,296
Total assets	$ 123,639	126,248	$ 123,639	126,248
Percentage change in direct operating expenses	(8.00%)		(4.00%)
Percentage change in selling, general and administrative expenses	(8.00%)		(4.00%)
Percentage change in depreciation and amortization	(5.00%)		(9.00%)
Percentage change in segment operating profit (loss)	48.00%		(125.00%)
Radio \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ 492	333	$ (122)	486
Digital
Segment Reporting Information [Line Items]
Cost of revenue	13,240	9,910	35,249	20,424
Direct operating expenses	5,977	4,560	15,930	9,884
Selling, general and administrative expenses	2,977	2,370	8,313	5,587
Depreciation and amortization	1,252	1,200	3,489	2,972
Capital expenditures	226	50	473	63
Total assets	$ 86,782	82,777	$ 86,782	82,777
Percentage change in cost of revenue	34.00%		73.00%
Percentage change in direct operating expenses	31.00%		61.00%
Percentage change in selling, general and administrative expenses	26.00%		49.00%
Percentage change in depreciation and amortization	4.00%		17.00%
Percentage change in segment operating profit (loss)	12.00%		(16.00%)
Digital \| Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	$ (1,015)	(909)	$ (1,748)	(2,073)
Advertising and Retransmission Consent
Segment Reporting Information [Line Items]
Net revenue	$ 73,397	70,612	$ 213,933	198,631
Percentage change in net revenue	4.00%		8.00%
Advertising and Retransmission Consent \| Television
Segment Reporting Information [Line Items]
Net revenue	$ 35,183	36,547	$ 105,574	112,021
Percentage change in net revenue	(4.00%)		(6.00%)
Advertising and Retransmission Consent \| Radio
Segment Reporting Information [Line Items]
Net revenue	$ 15,783	16,934	$ 47,126	49,816
Percentage change in net revenue	(7.00%)		(5.00%)
Advertising and Retransmission Consent \| Digital
Segment Reporting Information [Line Items]
Net revenue	$ 22,431	17,131	$ 61,233	36,794
Percentage change in net revenue	31.00%		66.00%
Spectrum Usage Rights
Segment Reporting Information [Line Items]
Net revenue	$ 1,178	263,943	$ 1,809	263,943
Percentage change in net revenue	(100.00%)		(99.00%)
Spectrum Usage Rights \| Television
Segment Reporting Information [Line Items]
Cost of revenue		$ 12,131		$ 12,131
Percentage change in cost of revenue	(100.00%)		(100.00%)

Capital additions including non cash additions.

No definition available.

Name:	evc_CapitalAdditionsIncludingNonCashAdditions
Namespace Prefix:	evc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Corporate expenses.

+ References

No definition available.

+ Details

Name:	evc_CorporateExpenses
Namespace Prefix:	evc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage change in cost of revenue.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInCostOfRevenue
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in depreciation and amortization.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInDepreciationAndAmortization
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in direct operating costs.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInDirectOperatingCosts
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in expenses.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInExpenses
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in foreign currency exchange gain loss.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInForeignCurrencyExchangeGainLoss
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in income loss before income taxes.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInIncomeLossBeforeIncomeTaxes
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in interest expense.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInInterestExpense
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in interest income.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInInterestIncome
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in net revenue.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInNetRevenue
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in operating income (loss).

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInOperatingIncomeLoss
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in operating profit loss.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInOperatingProfitLoss
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage change in selling, general and administrative expenses.

+ References

No definition available.

+ Details

Name:	evc_PercentageChangeInSellingGeneralAndAdministrativeExpense
Namespace Prefix:	evc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate cost of goods produced and sold and services rendered during the reporting period.

+ References

+ Details

Name:	us-gaap_CostOfRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

+ Details

Name:	us-gaap_DepreciationAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate direct operating costs incurred during the reporting period.

+ References

+ Details

Name:	us-gaap_DirectOperatingCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30700-110894

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894

+ Details

Name:	us-gaap_ForeignCurrencyTransactionGainLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (210.5-03(11))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.9)
-URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260

+ Details

Name:	us-gaap_InterestExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of dividend income on nonoperating securities.

+ References

+ Details

Name:	us-gaap_InvestmentIncomeDividend
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(b))
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

+ Details

Name:	us-gaap_InvestmentIncomeInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

+ Details

Name:	us-gaap_OperatingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of income (expense) related to nonoperating activities, classified as other.

+ References

+ Details

Name:	us-gaap_OtherNonoperatingIncomeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 30
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

Name:	us-gaap_SellingGeneralAndAdministrativeExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=evc_TelevisionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=evc_RadioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=evc_DigitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=evc_AdvertisingAndRetransmissionConsentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=evc_SpectrumUsageRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: