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Note 4 - Fair Value (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
  

Fair Value at

  

Fair Value at

 
  

September 30,

  

December 31,

 
  

2023

  

2022

 

Assets:

        

Non-qualified benefit plan assets (a)

 $9,148  $8,874 

Interest rate swaps (b)

 $7,272   7,039 
         

Total Assets

 $16,420  $15,913 
         

Liabilities:

        

Long-term debt (c)

 $189,385  $207,737 

Total Liabilities

 $189,385  $207,737