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Note 4 - Fair Value Disclosure Measurements (Details) - Additional Quantitative Information About Assets Measured at Fair Value on Non-Recurring Basis (USD $) In Thousands, unless otherwise specified |  |  | 9 Months Ended |  |  | 9 Months Ended
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 Appraisal Adjustments [Member] Impaired Loans [Member] | Dec. 31, 2012 Appraisal Adjustments [Member] Impaired Loans [Member] | Sep. 30, 2013 Appraisal Adjustments [Member] Minimum [Member] Impaired Loans [Member] | Sep. 30, 2013 Appraisal Adjustments [Member] Maximum [Member] Impaired Loans [Member] | Sep. 30, 2013 Liquidation Expenses [Member] Minimum [Member] Impaired Loans [Member] | Sep. 30, 2013 Liquidation Expenses [Member] Maximum [Member] Impaired Loans [Member] | Sep. 30, 2013 Appraisal of Collateral [Member] Other Real Estate Owned [Member] | Dec. 31, 2012 Appraisal of Collateral [Member] Other Real Estate Owned [Member] | Sep. 30, 2013 Appraisal of Collateral [Member] Minimum [Member] Other Real Estate Owned [Member] | Sep. 30, 2013 Appraisal of Collateral [Member] Maximum [Member] Other Real Estate Owned [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] |  |  |  |  |  |  |  |  |  |
Estimate | $ 15,467 | $ 17,600 |  |  |  |  | $ 2,719 | $ 1,846 |  |
Range |  |  | 0.00% | (68.00%) | 0.00% | (45.80%) |  |  | 0.00% | (10.00%)

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- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
Name: | us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_FairValueInputsAssetsQuantitativeInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueInputsDiscountRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration