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Stock-Based Compensation (Schedule Of Unrecognized Compensation Cost) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Stock-Based Compensation [Abstract]  
2015 $ 155evbn_ShareBasedCompensationShareBasedAwardsOtherThanOptionsUnrecognizedCompensationCostExpectedToBeRecognizedInNextTwelveMonths
2016 130evbn_ShareBasedCompensationShareBasedAwardsOtherThanOptionsUnrecognizedCompensationCostExpectedToBeRecognizedInYearTwo
2017 83evbn_ShareBasedCompensationShareBasedAwardsOtherThanOptionsUnrecognizedCompensationCostExpectedToBeRecognizedInYearThree
2018 $ 23evbn_ShareBasedCompensationShareBasedAwardsOtherThanOptionsUnrecognizedCompensationCostExpectedToBeRecognizedInYearFour