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Branch Activity (Details) (USD $) In Millions, unless otherwise specified | Sep. 10, 2014 | Aug. 27, 2014 | Feb. 25, 2014
--- | --- | --- | ---
Branch Activity [Abstract] |  |  |
Amount Of Contract | $ 1.3 |  | $ 1.8
Contract Price Paid |  | $ 1.8 |

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

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

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