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Loans And Leases, Net (Troubled Debt Restructurings That Subsequently Defaulted) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
contract
Dec. 31, 2013
contract
Commercial And Industrial [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Contracts 3evbn_TroubledDebtRestructuringsThatSubsequentlyDefaultedNumberOfContracts
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= evbn_CommercialAndIndustrialMember		 7evbn_TroubledDebtRestructuringsThatSubsequentlyDefaultedNumberOfContracts
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= evbn_CommercialAndIndustrialMember
Recorded investment of restructured contracts that subsequently defaulted $ 191evbn_TroubledDebtRestructuringModificationsSubsequentDefaultRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= evbn_CommercialAndIndustrialMember		 $ 224evbn_TroubledDebtRestructuringModificationsSubsequentDefaultRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= evbn_CommercialAndIndustrialMember
Commercial Real Estate: Commercial [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Contracts 1evbn_TroubledDebtRestructuringsThatSubsequentlyDefaultedNumberOfContracts
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= evbn_CommercialRealEstateCommercialMember		 1evbn_TroubledDebtRestructuringsThatSubsequentlyDefaultedNumberOfContracts
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= evbn_CommercialRealEstateCommercialMember
Recorded investment of restructured contracts that subsequently defaulted 250evbn_TroubledDebtRestructuringModificationsSubsequentDefaultRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= evbn_CommercialRealEstateCommercialMember		 160evbn_TroubledDebtRestructuringModificationsSubsequentDefaultRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= evbn_CommercialRealEstateCommercialMember
Home Equity Loans [Member]    
Financing Receivable, Modifications [Line Items]    
Number of Contracts 1evbn_TroubledDebtRestructuringsThatSubsequentlyDefaultedNumberOfContracts
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember		  
Recorded investment of restructured contracts that subsequently defaulted $ 54evbn_TroubledDebtRestructuringModificationsSubsequentDefaultRecordedInvestment
/ us-gaap_FinancingReceivableTroubledDebtRestructuringAxis
= us-gaap_HomeEquityMember