XML 83 R68.htm IDEA: XBRL DOCUMENT v2.4.1.9
Allowance for Loan Losses (Impaired Loans By Class) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance $ 18,636us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance $ 14,707us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance  
Recorded Investment 17,055us-gaap_ImpairedFinancingReceivableRecordedInvestment 13,810us-gaap_ImpairedFinancingReceivableRecordedInvestment  
Related Allowance 643us-gaap_ImpairedFinancingReceivableRelatedAllowance 1,478us-gaap_ImpairedFinancingReceivableRelatedAllowance  
Average Recorded Investment 19,051us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment 15,209us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment 17,700us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
Interest Income Recognized 454us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod 681us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod 743us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Commercial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,448us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 1,532us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Recorded Investment 2,107us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 1,366us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Related Allowance 44us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 334us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Average Recorded Investment 2,545us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 1,600us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Interest Income Recognized 19us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		 67us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialPortfolioSegmentMember		  
Commercial Real Estate [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 6,188us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 5,052us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		  
Recorded Investment 5,722us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 4,782us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		  
Related Allowance 203us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 299us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		  
Average Recorded Investment 6,357us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 5,136us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		  
Interest Income Recognized 167us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		 258us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_CommercialRealEstatePortfolioSegmentMember		  
Construction And Farmland [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,704us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		 2,692us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		  
Recorded Investment 2,669us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		 2,684us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		  
Related Allowance 93us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		 218us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		  
Average Recorded Investment 2,755us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		 2,728us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		  
Interest Income Recognized 73us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		 115us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandFinancingReceivableMember		  
Residential [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 7,296us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 5,425us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Recorded Investment 6,557us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 4,972us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Related Allowance 303us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 627us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Average Recorded Investment 7,394us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 5,738us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
Interest Income Recognized 195us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		 240us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= us-gaap_ResidentialPortfolioSegmentMember		  
All Other Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		 6us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		  
Recorded Investment 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		 6us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		  
Related Allowance 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		  
Average Recorded Investment 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		 7us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		  
Interest Income Recognized   1us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember		  
With No Related Allowance [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 15,863us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 10,475us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment 14,661us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 9,613us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 16,242us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 10,757us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 370us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 477us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | Commercial - Non Real Estate Commercial And Industrial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,159us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 289us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment 2,013us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 145us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 2,256us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 329us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 19us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 8us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | Commercial Real Estate Owner Occupied [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,824us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 2,474us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment 2,473us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 2,273us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 2,857us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 2,512us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 48us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 118us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | Commercial Real Estate Non-Owner Occupied [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,675us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 1,470us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment 2,560us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 1,398us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 2,796us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 1,498us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 86us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 91us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | Construction And Farmland Residential [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment   0us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | Construction And Farmland Commercial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,319us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 2,391us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment 2,319us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 2,401us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 2,362us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 2,420us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 68us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 97us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | Residential Equity Lines [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 252us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 455us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment 78us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 290us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 252us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 460us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 16us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | Residential Single Family [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 5,634us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 3,390us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment 5,218us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 3,100us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 5,719us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 3,531us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 149us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 146us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | Residential Multifamily [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With No Related Allowance [Member] | All Other Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance   6us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Recorded Investment   6us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Average Recorded Investment   7us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
Interest Income Recognized   1us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithNoRelatedAllowanceMember		  
With An Allowance Recorded [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 2,773us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 4,232us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Recorded Investment 2,394us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 4,197us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 643us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,478us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Average Recorded Investment 2,809us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 4,452us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized 84us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 204us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | Commercial - Non Real Estate Commercial And Industrial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 289us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,243us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Recorded Investment 94us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,221us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 44us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 334us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Average Recorded Investment 289us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,271us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 59us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialNonRealEstateCommercialAndIndustrialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | Commercial Real Estate Owner Occupied [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 689us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Recorded Investment 689us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 203us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Average Recorded Investment 704us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized 33us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | Commercial Real Estate Non-Owner Occupied [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,108us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Recorded Investment 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,111us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 299us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Average Recorded Investment 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,126us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 49us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_CommercialRealEstateNonOwnerOccupiedMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | Construction And Farmland Residential [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Recorded Investment 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Average Recorded Investment 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandResidentialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | Construction And Farmland Commercial [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 385us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Recorded Investment 350us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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Related Allowance 93us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Average Recorded Investment 393us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized 5us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ConstructionAndFarmlandCommercialFinancingReceivableMember
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= efsi_WithAllowanceMember		 18us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | Residential Equity Lines [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 403us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Recorded Investment 253us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 95us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Average Recorded Investment 403us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialEquityLinesFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized 5us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | Residential Single Family [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 1,007us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Recorded Investment 1,008us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,508us-gaap_ImpairedFinancingReceivableRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 208us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Average Recorded Investment 1,020us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		 1,530us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized 41us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialSingleFamilyMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | Residential Multifamily [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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Recorded Investment 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_ResidentialMultifamilyFinancingReceivableMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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Average Recorded Investment 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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Interest Income Recognized 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
With An Allowance Recorded [Member] | All Other Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Unpaid Principal Balance 0us-gaap_ImpairedFinancingReceivableUnpaidPrincipalBalance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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Recorded Investment 0us-gaap_ImpairedFinancingReceivableRecordedInvestment
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Related Allowance 0us-gaap_ImpairedFinancingReceivableRelatedAllowance
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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Average Recorded Investment 0us-gaap_ImpairedFinancingReceivableAverageRecordedInvestment
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/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
= efsi_WithAllowanceMember		  
Interest Income Recognized $ 0us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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/ us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis
= efsi_OtherLoansMember
/ efsi_ImpairedFinancingReceivableWithAndWithoutRecordedAllowanceAxis
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