XML 41 R31.htm IDEA: XBRL DOCUMENT v3.8.0.1

General (Details)	Mar. 31, 2018
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