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Note 11 - Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   
Three Months Ended March 31,
 
Income Statement
 
   
2019
   
2018
 
Location
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
   
Service cost
  $
80
    $
68
 
Salaries and employee benefits
 
Interest cost
   
101
     
89
 
Other expense
 
Amortization of prior service cost
   
64
     
59
 
Other expense
 
Amortization of losses
   
5
     
12
 
Other expense
 
Net periodic cost
  $
250
    $
228