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Acquisitions - Summary of Purchase Price Allocation for Company's Acquisition of Pulpo Media, Inc (Detail) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Jun. 18, 2014
Business Acquisition [Line Items]      
Accounts receivable     $ 1,600,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
Goodwill 50,081,000us-gaap_Goodwill 50,081,000us-gaap_Goodwill  
Pulpo Media Inc      
Business Acquisition [Line Items]      
Accounts receivable     1,600,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Prepaids and other assets     100,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsPrepaidExpenseAndOtherAssets
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Property and equipment     500,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Intangible assets subject to amortization     3,400,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Goodwill     14,100,000us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Current liabilities     (1,800,000)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember
Deferred income taxes     $ (1,500,000)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent
/ us-gaap_BusinessAcquisitionAxis
= evc_PulpoMediaIncMember