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Segment Reporting (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Segment Reporting Information [Line Items]            
Sales $ 410,022   $ 453,479   $ 787,813 $ 790,308
Selling, general and administrative expenses 25,416   24,431   48,825 48,024
Net income 31,371 $ 23,344 38,927 $ (17,396) 54,715 21,531
Reportable Segment            
Segment Reporting Information [Line Items]            
Sales 410,022   453,479   787,813 790,308
Variable costs of goods sold 175,178   204,090   328,082 375,530
Plant costs 127,376   118,968   249,229 235,399
Freight and distribution costs 46,211   46,859   93,614 90,158
Selling, general and administrative expenses 25,416   24,431   48,825 48,024
Other segment items 4,470   20,204   13,348 19,666
Net income $ 31,371   $ 38,927   $ 54,715 $ 21,531