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New Branch Construction (Details) (USD $) In Millions, unless otherwise specified | Aug. 03, 2012
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New Branch Construction [Abstract] |
Amount of contract to build branch | $ 1.2

X
- Definition Amount Of Contract + References No definition available. + Details
Name: | efsi_AmountOfContract
Namespace Prefix: | efsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | efsi_NewBranchConstructionAbstract
Namespace Prefix: | efsi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration