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Note 6 - Securities Sold Under Agreements to Repurchase (Tables)
3 Months Ended
Mar. 31, 2014
Disclosure Text Block [Abstract]  
Schedule of Repurchase Agreements [Table Text Block]
   

Three Months Ended

March 31, 2014

   

Twelve Months Ended

December 31, 2013

 
                 

Outstanding balance at end of period

  $ 63,165,000     $ 69,305,000  

Average interest rate at end of period

    0.13 %     0.12 %
                 

Average daily balance during the period

  $ 76,412,000     $ 65,939,000  

Average interest rate during the period

    0.12 %     0.12 %
                 

Maximum daily balance during the period

  $ 91,303,000     $ 78,960,000