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Loans (Details 4) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Impaired financing receivables with related and not related allowances |  |
Total average recorded investment | $ 24,294 | $ 23,233
Total cash basis interest recognized | 4 | 8
Total Interest Income Recognized | 4 | 8
Commercial, industrial, and agricultural [Member] |  |
Impaired financing receivables with related and not related allowances |  |
Allowance average recorded Investment | 1,630 | 2,673
Allowance recorded Interest Income recognized | 0 | 4
Allowance recorded cash basis interest recognized | 0 | 4
No allowance average recorded investment | 2,238 | 3,412
No allowance recorded interest income recognized | 0 | 0
No allowance recorded cash basis interest recognized | 0 | 0
Commercial mortgages [Member] |  |
Impaired financing receivables with related and not related allowances |  |
Allowance average recorded Investment | 5,107 | 4,918
Allowance recorded Interest Income recognized | 3 | 0
Allowance recorded cash basis interest recognized | 3 | 0
No allowance average recorded investment | 14,922 | 12,061
No allowance recorded interest income recognized | 0 | 0
No allowance recorded cash basis interest recognized | 0 | 0
Residential real estate [Member] |  |
Impaired financing receivables with related and not related allowances |  |
Allowance average recorded Investment | 252 | 169
Allowance recorded Interest Income recognized | 1 | 4
Allowance recorded cash basis interest recognized | 1 | 4
No allowance average recorded investment | 145 | 0
No allowance recorded interest income recognized | 0 | 0
No allowance recorded cash basis interest recognized | $ 0 | $ 0

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