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v3.24.1

Fair Value Measurements (Additional Information) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value Disclosures [Abstract] |  |
Other Real Estate Owned | $ 0 | $ 108

X
- Definition Balance Other Real Estate Owned + References No definition available. + Details
Name: | efsi_BalanceOtherRealEstateOwned
Namespace Prefix: | efsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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