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Note 5 - Loans (Details Textual)
$ in Millions
3 Months Ended
Mar. 31, 2016
USD ($)
Extension of Credit [Member]  
Commitments and Contingencies $ 164.1
Extension of Lines of Credit [Member]  
Commitments and Contingencies $ 219.6
Fair Value of Collateral Dependent Loans as a Percentage of Appraised or Estimated Value of Collateral 85.00%
Collateral Dependent Impaired Loans Measured by Third Party Appraisals $ 27.3
Collateral Dependent Impaired Loans Measured by Third Party Appraisals Percentage 80.80%
Collateral Dependent Impaired Loans Measured Internally $ 6.5
Collateral Dependent Impaired Loans Measured Internally Percentage 19.20%