XML 120 R88.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Stock-Based Compensation (Narrative) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Maximum term for an option granted | 10 years |  |
Grant date fair value of vested Restricted Stock | $ 195 | $ 163 |
Compensation expense | 242 | 166 | 116
Unrecognized compensation cost related to unvested Restricted Stock | $ 52 |  |
Outside Directors [Member] |  |  |
Vesting service period of grants to executive officers | 6 months |  |
Executive Officers [Member] |  |  |
Vesting service period of grants to executive officers | 3 years |  |

X
- Definition Deferred Compensation Arrangement Grant Date Fair Value Of Vested Restricted Stock + References No definition available. + Details
Name: | efsi_DeferredCompensationArrangementGrantDateFairValueOfVestedRestrictedStock
Namespace Prefix: | efsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Deferred Compensation Arrangements Unrecognized Compensation Cost Related To Unvested Restricted Stock + References No definition available. + Details
Name: | efsi_DeferredCompensationArrangementsUnrecognizedCompensationCostRelatedToUnvestedRestrictedStock
Namespace Prefix: | efsi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum Term For Option Granted Under Stock Based Compensation Plan + References No definition available. + Details
Name: | efsi_MaximumTermForOptionGrantedUnderStockBasedCompensationPlan
Namespace Prefix: | efsi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense recognized from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments), awarded to key employees or individuals. Excludes amount related to plans that cover generally all employees (for example, but not limited to, qualified pension plans). + References No definition available. + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration