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Loans and Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2012 | Dec. 31, 2011
Impaired loans without a valuation allowance, Recorded Investment | $ 9,799 | $ 8,196
Impaired loans without a valuation allowance, Unpaid Principal Balance | 11,695 | 8,390
Impaired loans without a valuation allowance, Average Recorded Investment | 9,044 | 11,273
Impaired loans without a valuation allowance, Interest Income Recognized | 192 | 575
Impaired loans with a valuation allowance, Recorded Investment | 8,416 | 17,221
Impaired loans with a valuation allowance, Unpaid Principal Balance | 9,865 | 17,338
Impaired loans with a valuation allowance, Related Allowance | 3,170 | 4,976
Impaired loans with a valuation allowance, Average Recorded Investment | 12,642 | 12,323
Impaired loans with a valuation allowance, Interest Income Recognized | 123 | 1,066
Total impaired loans, Recorded Investment | 18,215 | 25,417
Total impaired loans, Unpaid Principal Balance | 21,560 | 25,728
Total impaired loans,Related Allowance | 3,170 | 4,976
Total impaired loans, Average Recorded Investment | 21,686 | 23,596
Total impaired loans, Interest Income Recognized | 315 | 1,641
Commercial Real Estate Mortgage [Member] |  |
Impaired loans without a valuation allowance, Recorded Investment | 5,565 | 4,354
Impaired loans without a valuation allowance, Unpaid Principal Balance | 5,595 | 4,354
Impaired loans without a valuation allowance, Average Recorded Investment | 4,627 | 5,378
Impaired loans without a valuation allowance, Interest Income Recognized | 103 | 330
Impaired loans with a valuation allowance, Recorded Investment | 6,196 | 9,639
Impaired loans with a valuation allowance, Unpaid Principal Balance | 7,645 | 9,694
Impaired loans with a valuation allowance, Related Allowance | 2,193 | 2,605
Impaired loans with a valuation allowance, Average Recorded Investment | 7,574 | 5,912
Impaired loans with a valuation allowance, Interest Income Recognized | 75 | 645
Consumer Real Estate Mortgage [Member] |  |
Impaired loans without a valuation allowance, Recorded Investment | 1,764 | 322
Impaired loans without a valuation allowance, Unpaid Principal Balance | 3,596 | 322
Impaired loans without a valuation allowance, Average Recorded Investment | 1,490 | 3,589
Impaired loans without a valuation allowance, Interest Income Recognized | 66 | 21
Impaired loans with a valuation allowance, Recorded Investment | 753 | 6,195
Impaired loans with a valuation allowance, Unpaid Principal Balance | 753 | 6,257
Impaired loans with a valuation allowance, Related Allowance | 324 | 1,254
Impaired loans with a valuation allowance, Average Recorded Investment | 3,817 | 5,333
Impaired loans with a valuation allowance, Interest Income Recognized | 8 | 294
Construction and Land Development [Member] |  |
Impaired loans without a valuation allowance, Recorded Investment | 246 | 829
Impaired loans without a valuation allowance, Unpaid Principal Balance | 253 | 1,023
Impaired loans without a valuation allowance, Average Recorded Investment | 505 | 1,099
Impaired loans without a valuation allowance, Interest Income Recognized | 4 | 59
Impaired loans with a valuation allowance, Recorded Investment | 706 | 879
Impaired loans with a valuation allowance, Unpaid Principal Balance | 706 | 879
Impaired loans with a valuation allowance, Related Allowance | 446 | 653
Impaired loans with a valuation allowance, Average Recorded Investment | 686 | 294
Impaired loans with a valuation allowance, Interest Income Recognized | 13 | 62
Commercial and Industrial Loans [Member] |  |
Impaired loans without a valuation allowance, Recorded Investment | 2,224 | 2,691
Impaired loans without a valuation allowance, Unpaid Principal Balance | 2,251 | 2,691
Impaired loans without a valuation allowance, Average Recorded Investment | 2,422 | 1,207
Impaired loans without a valuation allowance, Interest Income Recognized | 19 | 165
Impaired loans with a valuation allowance, Recorded Investment | 761 | 508
Impaired loans with a valuation allowance, Unpaid Principal Balance | 761 | 508
Impaired loans with a valuation allowance, Related Allowance | 207 | 464
Impaired loans with a valuation allowance, Average Recorded Investment | 565 | 784
Impaired loans with a valuation allowance, Interest Income Recognized | $ 27 | $ 65

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