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Note 18 - Post-retirement Benefits (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   

Three Months Ended March 31,

 
   

2024

   

2023

 

Amortization of prior service credit

  $ 61     $ 61  

Interest cost

    (1,604 )     (1,533 )

Expected return on plan assets

    1,926       986  

Total

  $ 383     $ (486 )