Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Fair Value - Fair Value of Financial Instruments (Details)

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Note 10 - Fair Value - Fair Value of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Derivative Asset, Total $ 0  
Reported Value Measurement [Member]    
Non-qualified employee benefit plan investments 15,000 $ 25,000
Derivative Asset, Total 0 (7,000)
Long-term debt (including current portion) (1,488,000) (1,550,000)
Reported Value Measurement [Member] | Venator Materials PLC [Member]    
Investment in Venator 9,000 25,000
Estimate of Fair Value Measurement [Member]    
Non-qualified employee benefit plan investments 15,000 25,000
Derivative Asset, Total 0 (7,000)
Long-term debt (including current portion) (1,304,000) (1,698,000)
Estimate of Fair Value Measurement [Member] | Venator Materials PLC [Member]    
Investment in Venator $ 9,000 $ 25,000