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Note 8 - Loans by Loan Class Modified as TDRs (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Commercial Portfolio Segment [Member] | Secured by Residential Real Estate [Member]        
Number of contracts 1 4
Pre-modification outstanding recorded investment $ 41 $ 524
Post-modification outstanding recorded investment $ 41 $ 512
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]        
Number of contracts     6
Pre-modification outstanding recorded investment     $ 1,074
Post-modification outstanding recorded investment     $ 1,069
Number of contracts 1 10
Pre-modification outstanding recorded investment $ 41 $ 1,598
Post-modification outstanding recorded investment $ 41 $ 1,581