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Subsequent Events (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified | Feb. 25, 2015
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Subsequent Event [Member] |
Subsequent Event [Line Items] |
Operating lease term | 15 efsi_OperatingLeaseTerm / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember
Lease commitment | $ 3.3 us-gaap_OtherCommitment / us-gaap_SubsequentEventTypeAxis = us-gaap_SubsequentEventMember

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- Definition Operating Lease Term + References No definition available. + Details
Name: | efsi_OperatingLeaseTerm
Namespace Prefix: | efsi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration