v3.25.2
Investment in Kronos Worldwide, Inc. - Selected Financial Information of Kronos Income Statement (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Schedule Of Equity Method Investments [Line Items]        
Net sales $ 40,366 $ 35,887 $ 80,638 $ 73,858
Cost of sales 27,476 24,722 55,585 53,026
Income from operations 2,801 791 5,949 2,147
Income tax expense (benefit) (43) 1,302 (66) 2,290
Net income 355 7,835 1,022 14,674
Kronos | Reportable Legal Entities        
Schedule Of Equity Method Investments [Line Items]        
Net sales 494,400 500,500 984,200 979,300
Cost of sales 431,600 400,300 814,500 807,600
Income from operations 7,400 35,900 45,800 55,400
Income tax expense (benefit) 3,500 8,500 11,100 12,000
Net income $ (9,200) $ 19,500 $ 8,900 $ 27,600