Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Income Statement [Abstract]
Revenues	$ 268,260	$ 228,127
Costs and expenses:
Cost of goods sold	220,405	212,160
Selling, general and administrative expenses	19,855	20,727
Environmental charge	490	0
Total costs and expenses	240,750	232,887
Operating income (loss)	27,510	(4,760)
Interest expense, net	(1,492)	282
Non-operating pension and other postretirement employee benefits	(351)	201
Other	(206)	(145)
Income (loss) before income taxes	25,461	(4,422)
Income taxes	344	4,117
Net income (loss)	$ 25,805	$ (305)
Net income (loss) per share:
Basic	$ 0.33	$ 0
Diluted	0.33	0
Dividends per share	$ 0.45	$ 0.45
Weighted-average shares outstanding
Basic	79,000	79,677
Diluted	79,173	79,677