Segment (Tables)

6 Months Ended

Jun. 30, 2025

Segment Reporting [Abstract]

Summary of Information about Reported Segment Revenue, Measures of Segment's Profit or Loss, Significant Segment Expenses and Measure of Segment's Assets

Information about reported segment revenue, measures of a segment’s profit or loss, significant segment expenses, and measure of a segment's assets:

	Three Months Ended June 30,		Six Months Ended June 30,
	2025	2024	2025	2024
	(In Thousands)
Net sales	$151,296	$140,073	$294,728	$278,277
Less:
Cost of sales excluding depreciation, amortization   and turnaround expense	104,867	90,465	211,857	188,382
Depreciation and amortization	20,617	18,754	40,680	35,848
Turnaround expense	2,639	3,439	4,634	4,354
Total cost of sales	128,123	112,658	257,171	228,584
Selling, general and administrative
Wages and benefits	6,037	5,545	12,257	11,688
Other selling general and administrative	3,807	6,002	7,740	10,153
Total selling general and administrative	9,844	11,547	19,997	21,841
Interest expense	7,886	8,385	15,950	18,114
Loss (gain) on extinguishments of debt	59	(1,879)	59	(3,013)
Loss from asset write-down and disposals	2,528	1,489	2,599	2,943
Income tax provision	1,084	1,250	801	1,853
Other segment items (a)	(1,234)	(2,932)	(3,215)	(7,223)
Segment net income	3,006	9,555	1,366	15,178
Reconciliation of profit or loss
Adjustments and reconciling items	—	—	—	—
Consolidated net income	$3,006	$9,555	$1,366	$15,178

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(a) For the periods presented, amount consisted primarily of interest and sublease income.