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Dividend Investment Plan (Details) | Dec. 31, 2014
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Dividend Investment Plan [Abstract] |
Percentage of fair market value | 95.00%efsi_PercentageOfFairMarketValuePurchaseAdditionalSharesCommonStock

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- Details
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Namespace Prefix: | efsi_
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Period Type: | duration

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- Definition Percentage OF Fair Market Value Purchase Additional Shares Common Stock + References No definition available. + Details
Name: | efsi_PercentageOfFairMarketValuePurchaseAdditionalSharesCommonStock
Namespace Prefix: | efsi_
Data Type: | num:percentItemType
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