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Note 9 - Commitments and Contingent Liabilities (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]
    (Dollars in thousands)
    September 30,   December 31,
    2019   2018
Standby Letters of Credit   $
36,764
     $
37,559
  
Performance Letters of Credit    
2,966
      
3,544
  
Commitments to Extend Credit    
1,974
      
2,783
  
Construction Mortgages    
50,145
      
56,691
  
Personal Lines of Credit    
6,511
      
6,186
  
Overdraft Protection Lines    
6,295
      
6,140
  
Home Equity Lines of Credit    
20,720
      
21,520
  
Commercial Lines of Credit    
80,410
      
74,602
  
    $
205,785
     $
209,025