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Loans (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011
Loans individually evaluated for impairment by portfolio segment |  |  |  |  |
Impaired loans with allowance | $ 2,066 |  | $ 2,066 |  | $ 1,493
Impaired loans, principal balance | 31,692 |  | 31,692 |  | 26,971
Recorded Investment, Total | 25,632 |  | 25,632 |  | 22,384
Total average recorded investment | 26,424 | 17,182 | 24,827 | 15,586 |
Total cash basis interest recognized | 6 | 3 | 17 | 19 |
Total Interest Income Recognized | 6 | 3 | 17 | 19 |
Commercial, industrial, and agricultural [Member] |  |  |  |  |
Loans individually evaluated for impairment by portfolio segment |  |  |  |  |
Allowance recorded Unpaid Principal Balance | 6,616 |  | 6,616 |  | 4,329
Allowance recorded investment | 3,752 |  | 3,752 |  | 2,815
Impaired loans with allowance | 498 |  | 498 |  | 462
No allowance recorded Unpaid Principal Balance | 4,217 |  | 4,217 |  | 3,892
No allowance recorded investment | 3,460 |  | 3,460 |  | 3,300
Impaired loans without allowance | 0 |  | 0 |  | 0
Allowance average recorded Investment | 4,140 | 1,097 | 3,406 | 1,330 |
Allowance recorded Interest Income recognized | 0 | 0 | 3 | 0 |
Allowance recorded cash basis interest recognized | 0 | 0 | 3 | 0 |
No allowance average recorded investment | 3,506 | 1,525 | 3,459 | 1,738 |
No allowance recorded interest income recognized | 0 | 0 | 0 | 0 |
No allowance recorded cash basis interest recognized | 0 | 0 | 0 | 0 |
Commercial mortgages [Member] |  |  |  |  |
Loans individually evaluated for impairment by portfolio segment |  |  |  |  |
Allowance recorded Unpaid Principal Balance | 6,614 |  | 6,614 |  | 4,724
Allowance recorded investment | 6,063 |  | 6,063 |  | 4,065
Impaired loans with allowance | 1,500 |  | 1,500 |  | 1,012
No allowance recorded Unpaid Principal Balance | 13,511 |  | 13,511 |  | 13,839
No allowance recorded investment | 11,733 |  | 11,733 |  | 12,080
Impaired loans without allowance | 0 |  | 0 |  | 0
Allowance average recorded Investment | 6,180 | 6,554 | 5,549 | 8,050 |
Allowance recorded Interest Income recognized | 3 | 0 | 3 | 16 |
Allowance recorded cash basis interest recognized | 3 | 0 | 3 | 16 |
No allowance average recorded investment | 11,971 | 7,831 | 12,016 | 4,275 |
No allowance recorded interest income recognized | 0 | 0 | 0 | 0 |
No allowance recorded cash basis interest recognized | 0 | 0 | 0 | 0 |
Residential real estate [Member] |  |  |  |  |
Loans individually evaluated for impairment by portfolio segment |  |  |  |  |
Allowance recorded Unpaid Principal Balance | 551 |  | 551 |  | 187
Allowance recorded investment | 459 |  | 459 |  | 124
Impaired loans with allowance | 68 |  | 68 |  | 19
No allowance recorded Unpaid Principal Balance | 183 |  | 183 |  | 0
No allowance recorded investment | 165 |  | 165 |  | 0
Impaired loans without allowance | 0 |  | 0 |  | 0
Allowance average recorded Investment | 476 | 175 | 322 | 193 |
Allowance recorded Interest Income recognized | 3 | 3 | 11 | 3 |
Allowance recorded cash basis interest recognized | 3 | 3 | 11 | 3 |
No allowance average recorded investment | 151 | 0 | 75 | 0 |
No allowance recorded interest income recognized | 0 | 0 | 0 | 0 |
No allowance recorded cash basis interest recognized | $ 0 | $ 0 | $ 0 | $ 0 |

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