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Note 3 - Loans and Allowance for Loan Losses (Detail) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Mar. 30, 2012
Allowance for Loan and Lease Losses, Period Increase (Decrease) | $ 2,169,000 | $ 544,000 |  |
Allowance for Loan and Lease Losses, Write-offs |  | 271,000 |  |
Change in Troubled Debt Restructurings | 81.20% |  |  |
Financing Receivable, Modifications, Number of Contracts |  |  |  | 1
Financing Receivable, Allowance for Credit Losses, Write-downs | (5,136,000) | (10,422,000) | 5,879,000 |
Financing Receivable, Modifications, Recorded Investment | 16,954,000 | 9,355,000 |  |
Percentage of Loan Portfolio | 100.00% | 100.00% |  |
Impaired Financing Receivable, Related Allowance | 1,979 | 655 |  |
Loans and Leases Receivable, Impaired, Commitment to Lend | 109,000 |  |  |
Minimum Loan Balance for Loans Evaluated by Risk Categories |  | 500,000 |  |
Troubled Debt Restructurings [Member] |  |  |  |
Allowance for Loan and Lease Losses, Period Increase (Decrease) |  | 33,000 |  |
Allowance for Loan and Lease Losses, Write-offs | 536,000 |  |  |
Loans and Leases Receivable, Impaired, Commitment to Lend |  | 81,000 |  |
Modifications (Member) |  |  |  |
Allowance for Loan and Lease Losses, Write-offs |  | 414,000 |  |
Troubled Debt Restructurings Performing According to Modified Terms [Member] |  |  |  |
Percentage of Loan Portfolio | 93.00% | 97.00% |  |
Troubled Debt Restructurings [Member] |  |  |  |
Increase (Decrease) in Other Loans | 7,599,000 |  |  |
Financing Receivable, Allowance for Credit Losses, Write-downs |  | 10,206,000 |  |
Impaired Financing Receivable, Related Allowance | 2,107,000 | 655,000 |  |
Commercial and Industrial [Member] |  |  |  |
Financing Receivable, Modifications, Number of Contracts |  | 2 |  |
Percentage of Loan Portfolio | 10.25% | 7.55% |  |
Commercial Real Estate Loans [Member] |  |  |  |
Financing Receivable, Modifications, Recorded Investment | 5,984,000 |  |  | 4,222,000
Percentage of Loan Portfolio | 31.35% | 34.67% |  |
Troubled Debt Restructurings Modified in Current Period [Member] |  |  |  |
Impaired Financing Receivable, Related Allowance |  | $ 130,000 |  |
Unsecured [Member] |  |  |  |
Percentage of Loan Portfolio | 4.87% | 3.98% |  |

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- Definition Reflects the sum for the period of the additions and reductions to the loan loss reserve, which when added to the opening balance of the reserve will agree to the ending balance in the reserve. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 + Details
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- Definition Amount of direct write-downs of financing receivables charged against the allowance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953676-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18845-111554 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + 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 (a)(3) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 + Details
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- Definition The increase (decrease) during the reporting period in loans that are classified as working capital and are not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 + Details
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- Definition Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6951948&loc=d3e18794-111554 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 15 -Paragraph 40 -Subparagraph b. -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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