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Trust Preferred Capital Notes (Details) (USD $) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Sep. 20, 2007
Trust Preferred Capital Notes [Line Items] |  |  |
Common stock issued | $ 8,621,000 us-gaap_CommonStockValue | $ 8,482,000 us-gaap_CommonStockValue |
Trust preferred capital notes | 7,217,000 efsi_PreferredCapitalNotesOfTrust | 7,217,000 efsi_PreferredCapitalNotesOfTrust |
Portion of trust preferred securities in Tier 1 capital, percentage (not to exceed 25%) | 25.00%efsi_PortionOfTrustPreferredSecuritiesInTierOneCapitalPercentage |  |
Trust II [Member] |  |  |
Trust Preferred Capital Notes [Line Items] |  |  |
Trust preferred securities issued by subsidiary trust | 7,000,000 efsi_TrustPreferredSecuritiesIssuedBySubsidiaryTrust / dei_LegalEntityAxis = efsi_TrustIiMember |  | 7,000,000 efsi_TrustPreferredSecuritiesIssuedBySubsidiaryTrust / dei_LegalEntityAxis = efsi_TrustIiMember
Common stock issued |  |  | 217,000 us-gaap_CommonStockValue / dei_LegalEntityAxis = efsi_TrustIiMember
Trust preferred capital notes |  |  | $ 7,200,000 efsi_PreferredCapitalNotesOfTrust / dei_LegalEntityAxis = efsi_TrustIiMember
Floating rate of interest | 1.86%us-gaap_DebtInstrumentInterestRateAtPeriodEnd / dei_LegalEntityAxis = efsi_TrustIiMember |  |

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- Definition Portion of trust preferred securities in tier one capital, percentage. + References No definition available. + Details
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- Definition Preferred Capital Notes Of Trust + References No definition available. + Details
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- Details
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- Definition Trust preferred securities issued by subsidiary trust. + References No definition available. + Details
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. + 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 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 30 -Article 5 + Details
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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Details
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