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Financial Instruments with Off-Balance-Sheet Risk (Schedule of Financial Instruments) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract] |  |
Commitments to extend credit | $ 32,793 | $ 37,724
Unfunded commitments under lines of credit | 196,903 | 227,717
Commercial and standby letters of credit | $ 2,602 | $ 3,964

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- Definition Financial Instruments Commercial And Standby Letters Of Credit + References No definition available. + Details
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- Definition Financial Instruments Commitments To Extend Credit + References No definition available. + Details
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Namespace Prefix: | efsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Financial Instruments Unfunded Commitments Under Lines Of Credit + References No definition available. + Details
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Namespace Prefix: | efsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
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