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Acquisitions - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
0 Months Ended 12 Months Ended
Jun. 18, 2014
Dec. 31, 2014
Business Acquisition [Line Items]    
Accounts receivables assets acquired, fair value $ 1.6us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables  
Gross amount account receivables asset acquired 1.7us-gaap_BusinessCombinationAcquiredReceivablesGrossContractualAmount  
Amount due under contract expected to be uncollectible 0.1us-gaap_BusinessCombinationAcquiredReceivablesEstimatedUncollectible  
Pulpo Media Inc    
Business Acquisition [Line Items]    
Ownership Interest acquired 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
 
Business acquisition date   Jun. 18, 2014
Aggregate cash consideration 15.0us-gaap_PaymentsToAcquireBusinessesGross
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
 
Cash acquired 0.7us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
 
Fair value of contingent consideration 1.4us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
1.3us-gaap_BusinessCombinationLiabilitiesArisingFromContingenciesAmountRecognized
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Additional consideration payment term   90 days
Contingent consideration agreement, payment period 3 years  
Contingent consideration arrangements, maximum 3.0us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
 
Contingent consideration arrangements, minimum 0us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueLow
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
 
Contingent consideration, payment   1.0evc_ContingentConsiderationPayment
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Contingent consideration arrangements, reduction   0.1us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Accounts receivables assets acquired, fair value $ 1.6us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember