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

Three Months Ended September 30,

  

Nine Months Ended September 30,

 
  

2024

  

2023

  

2024

  

2023

 

Amortization of prior service credit

 $61  $61  $183  $183 

Interest cost

  (1,585)  (1,571)  (4,763)  (4,655)

Expected return on plan assets

  1,938   1,030   5,773   3,023 

Total

 $414  $(480) $1,193  $(1,450)