Note 6 - Bank Premises and Equipment (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Property, Plant and Equipment [Table Text Block]
 
 
2016
 
 
2015
 
Land, buildings and improvements
 
$
44,651
 
   $
47,398
 
Equipment, furniture and fixtures
 
 
25,492
 
    
24,481
 
Total Bank premises and equipment
 
$
70,143
 
   $
71,879
 
Less accumulated depreciation
 
 
42,974
 
    
43,635
 
Bank premises and equipment, net
 
$
27,169
 
   $
28,244
 
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Year
  
Minimum Payment
  
2017
   $
89,000
 
2018
    
47,000
 
2019
    
38,000
 
2020
    
32,000
 
2021
    
20,000
 
Thereafter
    
22,000
 
Total
   $
248,000