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Note 18 - Post-retirement Benefits (Tables)
6 Months Ended
Jun. 30, 2024
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
  

Three Months Ended June 30,

  

Six Months Ended June 30,

 
  

2024

  

2023

  

2024

  

2023

 

Amortization of prior service credit

 $61  $61  $122  $122 

Interest cost

  (1,574)  (1,551)  (3,178)  (3,084)

Expected return on plan assets

  1,909   1,007   3,835   1,993 

Total

 $396  $(483) $779  $(969)