XML 44 R34.htm IDEA: XBRL DOCUMENT
v3.8.0.1

General (Details) | Sep. 30, 2017
--- | ---
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Ownership percentage in subsidiaries | 100.00%

X
- Definition Consolidated Financial Ownership Wholly Owned Subsidiary Percentage + References No definition available. + Details
Name: | efsi_ConsolidatedFinancialOwnershipWhollyOwnedSubsidiaryPercentage
Namespace Prefix: | efsi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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