XML 37 R53.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Derivative Instruments And Hedging Activities (Narrative) (Details) (Interest Rate Swap Contracts [Member], USD $) | 6 Months Ended
--- | ---
Jun. 30, 2012
Interest Rate Swap Contracts [Member] |
Derivative [Line Items] |
Agreement related to the outstanding trust preferred capital notes, date | Dec. 04, 2008
Agreement effective, date | Dec. 01, 2008
Notional amount of derivatives | $ 7,000,000
Agreement expiration date | Dec. 01, 2016
Derivative, Fixed Interest Rate | 2.85%

X
- Definition Derivative effective dates. + References No definition available. + Details
Name: | efsi_DerivativeEffectiveDates
Namespace Prefix: | efsi_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeFixedInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Date the entity entered into the derivative contract, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DerivativeInceptionDates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Date the derivative contract matures, in CCYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_DerivativeMaturityDates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration