CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Net sales	$ 276,245	$ 309,817	$ 612,402	$ 603,863
Cost of sales	296,591	313,562	638,330	613,057
Startup and transition costs	8,662	20,678	17,032	42,907
Total cost of goods sold	305,253	334,240	655,362	655,964
Gross loss	(29,008)	(24,423)	(42,960)	(52,101)
General and administrative expenses	4,551	9,211	10,470	17,614
Loss on sale of assets and asset impairments	5,734	3,083	8,283	4,918
Restructuring charges, net	113	298	485	480
Loss from continuing operations	(39,406)	(37,015)	(62,198)	(75,113)
Other income (expense):
Interest expense, net	(24,618)	(22,428)	(48,822)	(43,811)
Foreign currency (loss) income	(4,817)	132	(7,158)	(499)
Miscellaneous (expense) income	(414)	227	1,050	2,702
Total other expense	(29,849)	(22,069)	(54,930)	(41,608)
Loss from continuing operations before income taxes	(69,255)	(59,084)	(117,128)	(116,721)
Income tax benefit (provision)	680	(2,412)	262	(5,654)
Net loss from continuing operations	(68,575)	(61,496)	(116,866)	(122,375)
Net income (loss) from discontinued operations	348	(29,593)	326	(30,182)
Net loss attributable to common stockholders	$ (68,227)	$ (91,089)	$ (116,540)	$ (152,557)
Weighted-average shares of common stock outstanding:
Basic	48,685	47,504	48,343	47,354
Diluted	48,685	47,504	48,343	47,354
Net loss from continuing operations per common share:
Basic	$ (1.41)	$ (1.3)	$ (2.42)	$ (2.58)
Diluted	(1.41)	(1.3)	(2.42)	(2.58)
Net loss from discontinued operations per common share:
Basic	0.01	(0.62)	0.01	(0.64)
Diluted	0.01	(0.62)	0.01	(0.64)
Net loss per common share:
Basic	(1.4)	(1.92)	(2.41)	(3.22)
Diluted	$ (1.4)	$ (1.92)	$ (2.41)	$ (3.22)