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Note 11 - Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2019
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   
Three Months Ended September 30,
   
Nine Months Ended September 30,
   
   
2019
   
2018
   
2019
   
2018
 
Income Statement Location
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Service cost
  $
80
    $
61
    $
240
    $
184
 
Salaries and employee benefits
Interest cost
   
101
     
90
     
303
     
269
 
Other expense
Amortization of prior service cost
   
65
     
57
     
193
     
171
 
Other expense
Amortization of losses
   
5
     
15
     
16
     
43
 
Other expense
Net periodic cost
  $
251
    $
223
    $
752
    $
667