Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Interest and Dividend Income
Interest and fees on loans	$ 5,301	$ 5,331
Interest and dividends on securities available for sale:
Taxable interest income	376us-gaap_InterestIncomeSecuritiesTaxable	507us-gaap_InterestIncomeSecuritiesTaxable
Interest income exempt from federal income taxes	243	286
Dividends	7us-gaap_DividendIncomeOperating	25us-gaap_DividendIncomeOperating
Interest on deposits with other institutions	11	1
Total interest and dividend income	5,938	6,150
Interest Expense
Interest on deposits	184us-gaap_InterestExpenseDeposits	244us-gaap_InterestExpenseDeposits
Interest on federal funds purchased and securities sold under agreements to repurchase	0	13
Interest on Federal Home Loan Bank advances	134us-gaap_InterestExpenseBorrowings	159us-gaap_InterestExpenseBorrowings
Interest on trust preferred capital notes	33	33
Interest on interest rate swap	46efsi_InterestOnInterestRateSwap	46efsi_InterestOnInterestRateSwap
Total interest expense	397us-gaap_InterestExpense	495us-gaap_InterestExpense
Net interest income	5,541us-gaap_InterestIncomeExpenseNet	5,655us-gaap_InterestIncomeExpenseNet
Provision For Loan Losses	133us-gaap_ProvisionForLoanAndLeaseLosses	283us-gaap_ProvisionForLoanAndLeaseLosses
Net interest income after provision for loan losses	5,408	5,372
Noninterest Income
Income from fiduciary activities	428	299
Service charges on deposit accounts	290	333
Other service charges and fees	756us-gaap_FeesAndCommissionsOther	653us-gaap_FeesAndCommissionsOther
Gain on sale of securities	74us-gaap_GainLossOnSaleOfSecuritiesNet	0us-gaap_GainLossOnSaleOfSecuritiesNet
Other operating income	81us-gaap_NoninterestIncomeOther	66us-gaap_NoninterestIncomeOther
Total noninterest income	1,629us-gaap_NoninterestIncome	1,351us-gaap_NoninterestIncome
Noninterest Expenses
Salaries and employee benefits	2,995us-gaap_LaborAndRelatedExpense	2,825us-gaap_LaborAndRelatedExpense
Occupancy expenses	346us-gaap_OccupancyNet	337us-gaap_OccupancyNet
Equipment expenses	146us-gaap_EquipmentExpense	182us-gaap_EquipmentExpense
Advertising and marketing expenses	119us-gaap_MarketingAndAdvertisingExpense	132us-gaap_MarketingAndAdvertisingExpense
Stationery and supplies	51us-gaap_SuppliesAndPostageExpense	90us-gaap_SuppliesAndPostageExpense
ATM network fees	158efsi_AtmNetworkFees	157efsi_AtmNetworkFees
Other real estate owned expense	6efsi_OtherRealEstateOwnedExpense	4efsi_OtherRealEstateOwnedExpense
Gains (Losses) on Sales of Other Real Estate	19	0
FDIC assessment	108	81
Computer software expense	221	199
Bank franchise tax	117efsi_BankFranchiseTax	102efsi_BankFranchiseTax
Professional fees	242us-gaap_ProfessionalFees	217us-gaap_ProfessionalFees
Other operating expenses	530us-gaap_OtherNoninterestExpense	517us-gaap_OtherNoninterestExpense
Total noninterest expenses	5,058us-gaap_NoninterestExpense	4,843us-gaap_NoninterestExpense
Income before income taxes	1,979	1,880
Income Tax Expense	524us-gaap_IncomeTaxExpenseBenefit	517us-gaap_IncomeTaxExpenseBenefit
Net income	$ 1,455us-gaap_NetIncomeLoss	$ 1,363us-gaap_NetIncomeLoss
Earnings Per Share
Net income per common share, basic	$ 0.42us-gaap_EarningsPerShareBasic	$ 0.40us-gaap_EarningsPerShareBasic
Net income per common share, diluted	$ 0.42us-gaap_EarningsPerShareDiluted	$ 0.40us-gaap_EarningsPerShareDiluted

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