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Securities, Temporarily Impaired Securities (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Temporarily impaired securities with gross unrealized losses and fair value [Abstract] |  |
Less Than 12 Months, Fair Value | $ 53,709 | $ 14,673
Less Than 12 Months, Unrealized Loss | 838 | 136
12 Months or More, Fair Value | 615 | 1,123
12 Months or More, Unrealized Loss | 176 | 188
Number of temporarily impaired securities | 59 | 19
Fair Value of temporarily impaired securities | 54,324 | 15,796
Unrealized loss on securities | 1,014 | 324
Carrying value of securities pledged to secure trust deposits | 147,114 | 147,152
Amount of qualifying assets as collateral for borrowing from FHLB | 129,330 |
U.S. Government Agencies and Corporations [Member] |  |
Temporarily impaired securities with gross unrealized losses and fair value [Abstract] |  |
Less Than 12 Months, Fair Value | 44,351 | 6,230
Less Than 12 Months, Unrealized Loss | 622 | 20
12 Months or More, Fair Value | 0 | 0
12 Months or More, Unrealized Loss | 0 | 0
State and Political Subdivisions [Member] |  |
Temporarily impaired securities with gross unrealized losses and fair value [Abstract] |  |
Less Than 12 Months, Fair Value | 9,358 | 3,527
Less Than 12 Months, Unrealized Loss | 216 | 19
12 Months or More, Fair Value | 482 | 981
12 Months or More, Unrealized Loss | 3 | 26
Corporate Debt Securities [Member] |  |
Temporarily impaired securities with gross unrealized losses and fair value [Abstract] |  |
Less Than 12 Months, Fair Value |  | 4,916
Less Than 12 Months, Unrealized Loss |  | 97
12 Months or More, Fair Value |  | 0
12 Months or More, Unrealized Loss |  | 0
Other [Member] |  |
Temporarily impaired securities with gross unrealized losses and fair value [Abstract] |  |
Less Than 12 Months, Fair Value | 0 | 0
Less Than 12 Months, Unrealized Loss | 0 | 0
12 Months or More, Fair Value | 133 | 142
12 Months or More, Unrealized Loss | $ 172 | $ 162

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- Definition This item represents the aggregate fair value of investments in debt and equity securities categorized as held-to-maturity and available for sale securities that have been in a continuous unrealized loss position. + References No definition available. + Details
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- Definition Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities. + References No definition available. + Details
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- Definition Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for securities. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities that have been in a continuous unrealized loss position for less than twelve months. + References No definition available. + Details
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- Definition This item represents the aggregate fair value of investments in debt and equity securities that have been in a continuous unrealized loss position for twelve months or longer. + References No definition available. + Details
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- Definition This item contains disclosure of the number of investment positions determined to be temporarily impaired. + References No definition available. + Details
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- Definition The fair value of available-for-sale securities that serve as collateral for borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5086-111524 + Details
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- Definition Reflects the aggregate value of loans, trade receivables, securities and financial instruments that serve as collateral for obligations arising from a transfer of financial assets recorded as a secured borrowing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5086-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 + Details
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- Definition The increase (decrease), resulting in a loss, in the difference between the fair value and the carrying value, or in the comparative fair values, of securities held at each balance sheet date, that was included in earnings for the period. + References No definition available. + Details
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