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Note 10 - Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
 
 
Three Months Ended March 31,
 
 
 
2017
 
 
2016
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
Service cost
  $
58
    $
47
 
Interest cost
   
93
     
96
 
Amortization of prior service cost
   
57
     
57
 
Amortization of losses
   
7
     
14
 
Net periodic cost
  $
215
    $
214