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Investment Securities (Narrative) (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Dec. 31, 2014
Investment [Line Items] |  |  |  |
Gross investment gains |  | $ 28,000 | $ 182,000 |
Gross investment losses | $ 36,000 | $ 36,000 | 5,000 |
Investment Securities: |  |  |  |
Consolidated investment securities portfolio modified, years |  | 2 years 7 months 28 days |  |
Proceeds from sales of investment securities - available for sale | 1,900,000 | $ 2,379,000 | $ 5,242,000 |
Book value of securities available for sale and held to maturity | $ 103,478,000 | $ 103,478,000 |  | $ 104,780,000
Standard & Poor's, AAA Rating [Member] |  |  |  |
Investment [Line Items] |  |  |  |
Portfolio rated | 79.90% | 79.90% |  | 84.10%
Standard & Poor's, A Rating [Member] |  |  |  |
Investment [Line Items] |  |  |  |
Portfolio rated | 5.70% | 5.70% |  |

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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=49167202&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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