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Note 6 - Loans And Related Allowance For Loan Losses (Detail) - Impaired Loans by Class (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Dec. 31, 2011
--- | --- | ---
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | $ 4,376 | $ 11,162
With no related allowance recorded - unpaid principal balance | 4,385 | 11,175
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 12,857 | 7,074
With an allowance recorded - unpaid principal balance | 12,876 | 7,090
With an allowance recorded - related allowance | 2,975 | 1,702
Total: |  |
Recorded investment | 17,233 | 18,237
Unpaid principal balance | 17,261 | 18,266
Related Allowance | 2,975 | 1,702
Commercial and Industrial [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 978 | 1,172
With no related allowance recorded - unpaid principal balance | 978 | 1,172
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 2,896 | 658
With an allowance recorded - unpaid principal balance | 2,899 | 658
With an allowance recorded - related allowance | 840 | 203
Total: |  |
Recorded investment | 3,874 | 1,830
Unpaid principal balance | 3,877 | 1,831
Related Allowance | 840 | 203
Real Estate Construction [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 203 | 4,250
With no related allowance recorded - unpaid principal balance | 203 | 4,250
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 3,986 | 271
With an allowance recorded - unpaid principal balance | 3,986 | 271
With an allowance recorded - related allowance | 442 | 125
Total: |  |
Recorded investment | 4,189 | 4,521
Unpaid principal balance | 4,189 | 4,521
Related Allowance | 442 | 125
Residential Real Estate Mortgage [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 1,859 | 3,188
With no related allowance recorded - unpaid principal balance | 1,863 | 3,193
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 2,451 | 1,813
With an allowance recorded - unpaid principal balance | 2,458 | 1,817
With an allowance recorded - related allowance | 556 | 547
Total: |  |
Recorded investment | 4,310 | 5,001
Unpaid principal balance | 4,321 | 5,010
Related Allowance | 556 | 547
Commercial Real Estate Mortgage [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 1,306 | 2,528
With no related allowance recorded - unpaid principal balance | 1,311 | 2,536
With an allowance recorded: |  |
With an allowance recorded - recorded Investment | 3,524 | 4,332
With an allowance recorded - unpaid principal balance | 3,533 | 4,344
With an allowance recorded - related allowance | 1,137 | 827
Total: |  |
Recorded investment | 4,830 | 6,861
Unpaid principal balance | 4,844 | 6,880
Related Allowance | 1,137 | 827
Consumer Installment [Member] |  |
With no related allowance recorded: |  |
With no related allowance recorded - recorded investment | 30 | 24
With no related allowance recorded - unpaid principal balance | 30 | 24
With an allowance recorded: |  |
With an allowance recorded - related allowance | 0 | 0
Total: |  |
Recorded investment | 30 | 24
Unpaid principal balance | 30 | 24
Related Allowance | $ 0 | $ 0

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 + Details
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