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Note 13 - Fair Value of Financial Instruments (Details) - Assets and Liabilities Measured at Fair Value on a Recurring and Nonrecurring Basis - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Fair Value, Inputs, Level 2 [Member] | US Government-sponsored Enterprises Debt Securities [Member] |  |
Assets: |  |
Assets measured on a recurring basis | $ 8,965 | $ 8,917
Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Assets: |  |
Assets measured on a recurring basis | 82,686 | 76,319
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Nonowner Occupied [Member] | Impaired Loans [Member] |  |
Commercial real estate: |  |
Assets measured on a nonrecurring basis | 2,473 | 5,270
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Other Real Estate Owned [Member] |  |
Commercial real estate: |  |
Assets measured on a nonrecurring basis | 1,147 | 1,147
Fair Value, Inputs, Level 3 [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Owner Occupied [Member] | Impaired Loans [Member] |  |
Commercial real estate: |  |
Assets measured on a nonrecurring basis |  | 1,679
Fair Value, Inputs, Level 3 [Member] | Commercial Portfolio Segment [Member] | Impaired Loans [Member] |  |
Commercial real estate: |  |
Assets measured on a nonrecurring basis | $ 3,779 | $ 2,532

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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 recurring 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
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