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Note 4 - Loans and Allowance for Loan Losses (Detail) - Loans Individually Evaluated for Impairment (USD $) In Thousands, unless otherwise specified | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2011
With an allowance recorded: |  |  |
Recorded Investment | $ 4,853 |  | $ 3,491
Allowance for Loan Losses Allocated | 2,206 | 405 | 655
Commercial real estate: |  |  |
Unpaid Principal Balance | 15,508 | 23,804 | 12,146
Recorded Investment | 13,937 | 18,610 | 11,572
Allowance for Loan Losses Allocated | 2,206 | 405 | 655
Average Impaired Loans | 11,764 | 19,107 | 11,163
Interest Income Recognized | 143 | 1,042 | 647
Cash Basis Interest Recognized | 125 | 900 | 608
Residential Real Estate Loans [Member] |  |  |
With no related allowance recorded: |  |  |
Unpaid Principal Balance | 914 | 1,761 | 1,136
Recorded Investment | 774 | 1,489 | 1,085
Average Impaired Loans | 662 | 1,171 | 748
Interest Income Recognized | 22 | 62 | 36
Cash Basis Interest Recognized | 22 | 45 | 31
With an allowance recorded: |  |  |
Unpaid Principal Balance | 420 |  | 420
Recorded Investment | 420 |  | 420
Allowance for Loan Losses Allocated | 128 |  | 130
Average Impaired Loans | 420 |  | 84
Interest Income Recognized | 7 |  | 27
Cash Basis Interest Recognized | 4 |  | 22
Commercial real estate: |  |  |
Allowance for Loan Losses Allocated | 128 |  | 130
Commercial Real Estate Owner Occupied [Member] |  |  |
With no related allowance recorded: |  |  |
Unpaid Principal Balance | 5,557 | 5,941 | 2,774
Recorded Investment | 5,557 | 5,213 | 2,531
Average Impaired Loans | 4,529 | 4,510 | 2,418
Interest Income Recognized | 23 | 283 | 207
Cash Basis Interest Recognized | 11 | 279 | 309
Commercial Real Estate Nonowner Occupied [Member] |  |  |
With no related allowance recorded: |  |  |
Unpaid Principal Balance | 3,948 | 5,827 | 4,131
Recorded Investment | 3,048 | 5,827 | 4,131
Average Impaired Loans | 3,657 | 5,840 | 4,339
Interest Income Recognized | 25 | 230 | 174
Cash Basis Interest Recognized | 22 | 209 | 57
With an allowance recorded: |  |  |
Unpaid Principal Balance | 2,737 | 2,405 | 2,396
Recorded Investment | 2,486 | 2,405 | 2,396
Allowance for Loan Losses Allocated | 2,078 | 405 | 437
Average Impaired Loans | 1,520 | 2,418 | 2,414
Interest Income Recognized | 26 | 100 | 128
Cash Basis Interest Recognized | 26 | 90 | 118
Commercial real estate: |  |  |
Allowance for Loan Losses Allocated | 2,078 | 405 | 437
Construction [Member] |  |  |
With no related allowance recorded: |  |  |
Unpaid Principal Balance | 1,713 | 674 |
Recorded Investment | 1,433 | 674 |
Average Impaired Loans | 811 | 678 |
Interest Income Recognized | 33 | 27 |
Cash Basis Interest Recognized | 33 | 26 |
With an allowance recorded: |  |  |
Unpaid Principal Balance |  |  | 675
Recorded Investment |  |  | 675
Allowance for Loan Losses Allocated |  |  | 88
Average Impaired Loans |  |  | 677
Interest Income Recognized |  |  | 35
Cash Basis Interest Recognized |  |  | 31
Commercial real estate: |  |  |
Allowance for Loan Losses Allocated |  |  | 88
Home Equity Loans [Member] |  |  |
With no related allowance recorded: |  |  |
Unpaid Principal Balance | 219 |  |
Recorded Investment | 219 |  |
Average Impaired Loans | 165 |  |
Interest Income Recognized | 7 |  |
Cash Basis Interest Recognized | 7 |  |
Commercial and Industrial [Member] |  |  |
With no related allowance recorded: |  |  |
Unpaid Principal Balance |  | 7,196 | 614
Recorded Investment |  | 3,002 | 334
Average Impaired Loans |  | 4,490 | 483
Interest Income Recognized |  | 340 | 40
Cash Basis Interest Recognized |  | $ 251 | $ 40

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