XML 110 R97.htm IDEA: XBRL DOCUMENT
v3.23.1

Financial Instruments with Off-Balance-Sheet Risk - Additional Information (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Collateralized letters of credit outstanding | $ 6.9
Excess of insurance limits held in cash accounts | $ 11.0

X
- Definition Collateralized Letters Of Credit Outstanding + References No definition available. + Details
Name: | efsi_CollateralizedLettersOfCreditOutstanding
Namespace Prefix: | efsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Excess Of Insurance Limits Held In Cash Accounts In Other Commercial Banks + References No definition available. + Details
Name: | efsi_ExcessOfInsuranceLimitsHeldInCashAccountsInOtherCommercialBanks
Namespace Prefix: | efsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration