CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Sales	$ 410,022	$ 453,479	$ 787,813	$ 790,308
Costs, expenses and other:
Costs of goods sold	351,308	372,111	675,628	705,975
Selling, general and administrative expenses	25,416	24,431	48,825	48,024
Interest expense, net	2,255	3,514	3,796	6,213
Other non-operating (income) expense, net	(607)	1,351	(1,015)	1,441
Total costs, expenses and other	378,372	401,407	727,234	761,653
Income before taxes	31,650	52,072	60,579	28,655
Income tax expense	279	13,145	5,864	7,124
Net income	$ 31,371	$ 38,927	$ 54,715	$ 21,531
Earnings per common share
Basic (in dollars per share)	$ 1.17	$ 1.45	$ 2.04	$ 0.80
Diluted (in dollars per share)	$ 1.15	$ 1.43	$ 2.01	$ 0.79
Weighted average common shares outstanding
Basic (in shares)	26,896,037	26,839,429	26,867,252	26,859,044
Diluted (in shares)	27,223,309	27,150,347	27,248,976	27,251,326