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Loans (Details 3) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Loans individually evaluated for impairment by portfolio segment |  |
Impaired loans with allowance | $ 1,852 | $ 1,493
Impaired loans, principal balance | 29,225 | 26,971
Recorded Investment, Total | 25,520 | 22,384
Commercial, industrial, and agricultural [Member] |  |
Loans individually evaluated for impairment by portfolio segment |  |
Allowance recorded Unpaid Principal Balance | 2,542 | 4,329
Allowance recorded investment | 1,792 | 2,815
Impaired loans with allowance | 541 | 329
No allowance recorded Unpaid Principal Balance | 2,804 | 3,892
No allowance recorded investment | 2,251 | 3,300
Impaired loans without allowance |  |
Commercial mortgages [Member] |  |
Loans individually evaluated for impairment by portfolio segment |  |
Allowance recorded Unpaid Principal Balance | 5,870 | 4,724
Allowance recorded investment | 5,329 | 4,065
Impaired loans with allowance | 1,230 | 1,145
No allowance recorded Unpaid Principal Balance | 17,285 | 13,839
No allowance recorded investment | 15,555 | 12,080
Impaired loans without allowance |  |
Residential real estate [Member] |  |
Loans individually evaluated for impairment by portfolio segment |  |
Allowance recorded Unpaid Principal Balance | 416 | 187
Allowance recorded investment | 381 | 124
Impaired loans with allowance | 81 | 19
No allowance recorded Unpaid Principal Balance | 308 |
No allowance recorded investment | 212 |
Impaired loans without allowance |  |

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