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Investment Securities (Narrative) (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013
Investment [Line Items] |  |  |  |
Gross investment gains | $ 66,000 | $ 182,000 | $ 137,000 |
Gross investment losses |  | 5,000 |  |
Investment Securities: |  |  |  |
Consolidated investment securities portfolio modified, years |  | 3 years 1 month 13 days |  |
Proceeds from sales of investment securities - available for sale | 1,100,000 | 5,242,000 | 2,298,000 |
Book value of securities available for sale and held to maturity |  | $ 119,411,000 |  | $ 110,780,000
Positions considered temporarily impaired |  | 53 |  |
Standard & Poor's, AAA Rating [Member] |  |  |  |
Investment [Line Items] |  |  |  |
Portfolio rated |  | 86.40% |  | 89.00%
Standard & Poor's, A Rating [Member] |  |  |  |
Investment [Line Items] |  |  |  |
Portfolio rated |  | 2.00% |  |

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