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Note 4 - Fair Value (Tables)
6 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

Fair Value at

  

Fair Value at

 
  

June 30,

  

December 31,

 
  

2022

  

2021

 

Assets:

        

Non-qualified benefit plan assets (a)

 $8,726  $10,347 

Interest rate swaps (b)

  1,716   - 
         

Total Assets

 $10,442  $10,347 
         

Liabilities:

        

Interest rate swaps (b)

 $-  $6,428 

Long-term debt (c)

  213,306   218,875 

Total Liabilities

 $213,306  $225,303