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Note 7 - Investments in Affordable Housing (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Note 7 - Investments in Affordable Housing (Details) [Line Items] |  |  |
Affordable Housing Investments | $ 84,108,000 | $ 85,037,000 |
Number of Limited Partnerships in Housing Investments | 6 | 6 |
Increase In Total Assets And Liabilities From Consolidating Affordable Housing Equity Interest | 23,800,000 | 22,900,000 |
Other Borrowings From Consolidating Affordable Housing Equity Interest | 19,100,000 | 18,700,000 |
Other Liabilities From Affordable Housing Unfunded Commitments | 7,000,000 | 10,600,000 |
Minimum Compliance Period, Tax Credits, Investments In Affordable Housing | 15 years |  |
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount | 9,800,000 | 9,200,000 | 9,500,000
Federal Tax [Member] | Affordable Housing Limited Partnerships [Member] |  |  |
Note 7 - Investments in Affordable Housing (Details) [Line Items] |  |  |
Tax Credit Carryforward, Amount | 41,800,000 |  |
State and Local Jurisdiction [Member] | Affordable Housing Limited Partnerships [Member] |  |  |
Note 7 - Investments in Affordable Housing (Details) [Line Items] |  |  |
Tax Credit Carryforward, Amount | $ 1,600,000 |  |

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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to investment tax credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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