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Fair Value (Details 5) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
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Impaired loans - commercial mortgages [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Fair value | $ 8,256 | $ 8,422
Impaired loans - commercial mortgages [Member] | Maximum [Member] | Sales Comparison Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Sales comparison approach | 39.00% | 39.00%
Impaired loans - commercial mortgages [Member] | Minimum [Member] | Sales Comparison Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Sales comparison approach | 1.00% | 1.00%
Impaired loans - commercial mortgages [Member] | Weighted Average [Member] | Sales Comparison Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Sales comparison approach | 19.00% | 19.00%
Impaired loans - commercial, industrial, and agricultural [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Fair value | 1,661 | 1,973
Impaired loans - commercial, industrial, and agricultural [Member] | Maximum [Member] | Income Approach Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Income approach | 32.00% | 38.00%
Impaired loans - commercial, industrial, and agricultural [Member] | Minimum [Member] | Income Approach Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Income approach | 27.00% | 24.00%
Impaired loans - commercial, industrial, and agricultural [Member] | Weighted Average [Member] | Income Approach Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Income approach | 28.00% | 27.00%
Impaired loans - residential real estate [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Fair value | $ 165 | $ 402
Impaired loans - residential real estate [Member] | Maximum [Member] | Sales Comparison Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Sales comparison approach | 26.00% | 15.00%
Impaired loans - residential real estate [Member] | Minimum [Member] | Sales Comparison Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Sales comparison approach | 17.00% | 10.00%
Impaired loans - residential real estate [Member] | Weighted Average [Member] | Sales Comparison Valuation Technique [Member] |  |
Quantitative information about level 3 fair value measurements for financial instruments measured at fair on non recurring basis |  |
Sales comparison approach | 23.00% | 11.00%

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- Definition Fair value valuation techniques negative adjustments for market conditions. + References No definition available. + Details
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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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