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Note 4 - Premises and Equipment, Net (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
September 30,
2018
   
December 31,
2017
 
                 
Land and improvements
  $
18,178,000
    $
18,046,000
 
Buildings
   
44,416,000
     
41,179,000
 
Furniture and equipment
   
17,977,000
     
17,398,000
 
     
80,571,000
     
76,623,000
 
Less: accumulated depreciation
   
32,467,000
     
30,589,000
 
                 
Premises and equipment, net
  $
48,104,000
    $
46,034,000