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Note 10 - Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   
Three Months Ended March 31,
 
 
   
2018
   
2017
 
Income Statement Location
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
Service cost
  $
68
    $
58
 
Salaries and employee benefits
Interest cost
   
89
     
93
 
Other expense
Amortization of prior service cost
   
59
     
57
 
Other expense
Amortization of losses
   
12
     
7
 
Other expense
Net periodic cost
  $
228
    $
215