Segment - Summary of Information about Reported Segment Revenue, Measures of Segment's Profit or Loss, Significant Segment Expenses and Measure of Segment's Assets (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 [Abstract]
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	(1,234)		(2,932)		(3,215)	(7,223)
Net income	3,006	$ (1,640)	9,555	$ 5,623	1,366	15,178
Reconciliation of Profit or Loss [Abstract]
Adjustments and reconciling items	$ 0		$ 0		$ 0	$ 0