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Note 6 - Loans And Related Allowance For Loan Losses (Detail) - Additional Information on Impaired Loans (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Commercial and Industrial [Member] |  |  |  |
Total: |  |  |  |
Average Recorded Investment | $ 1,488 | $ 4,337 | $ 1,440 | $ 3,604
Interest Income Recognized | 21 | 80 | 33 |
Real Estate Construction [Member] |  |  |  |
Total: |  |  |  |
Average Recorded Investment | 446 | 616 | 1,796 | 617
Interest Income Recognized |  |  | 1 | 82
Residential Real Estate Mortgage [Member] |  |  |  |
Total: |  |  |  |
Average Recorded Investment | 2,872 | 574 | 2,998 | 583
Interest Income Recognized | 61 | 33 | 88 |
Commercial Real Estate Mortgage [Member] |  |  |  |
Total: |  |  |  |
Average Recorded Investment | 2,124 | 3,762 | 3,190 | 3,430
Interest Income Recognized | 98 | 35 | 124 | 45
Consumer Installment [Member] |  |  |  |
Total: |  |  |  |
Average Recorded Investment | 27 |  | 26 |
Interest Income Recognized |  |  | $ 1 | $ 102

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- Definition Average 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 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 + Details
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