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Note 9 - Commitments and Contingent Liabilities (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]
    March 31,   December 31,
    2020   2019
(Dollars in thousands)        
         
Standby Letters of Credit   $
40,906
     $
42,041
  
Performance Letters of Credit    
2,667
      
2,521
  
Construction Mortgages    
77,672
      
59,689
  
Personal Lines of Credit    
6,561
      
6,456
  
Overdraft Protection Lines    
6,474
      
6,415
  
Home Equity Lines of Credit    
20,459
      
20,560
  
Commercial Lines of Credit    
77,470
      
102,422
  
Total Commitments   $
232,209
     $
240,104