Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Net sales	$ 1,192,043	$ 1,130,562	$ 1,262,704
Operating costs and expenses:
Cost of sales (exclusive of depreciation shown separately below)	869,201	809,882	928,637
Selling, general and administrative	180,247	191,087	184,255
Depreciation and amortization	29,625	32,259	45,509
Legal contingencies loss	7,338
Impairment of long-lived assets			2,308
Restructuring	6,970	3,172	19,221
Loss (gain) on sale of assets and businesses	12,208	(101,523)	9,294
Operating Expenses	1,105,589	934,877	1,189,224
Operating income	86,454	195,685	73,480
Non-service defined benefit income	(2,372)	(19,664)	(5,373)
Debt modification and extinguishment loss	1,694	33,044	11,624
Warrant remeasurement gain, net	(8,545)	(8,683)
Interest expense and other, net	123,021	115,211	113,080
(Loss) income from continuing operations before income taxes	(27,344)	75,777	(45,851)
Income tax expense	7,123	3,360	4,526
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest, Total	(34,467)	72,417	(50,377)
Income from discontinued operations, net of tax expense of $11,788, $2,728, and $397, respectively	546,851	17,176	7,619
Net income (loss)	$ 512,384	$ 89,593	$ (42,758)
(Loss) earnings per share - basic:
(Loss) earnings per share - continuing operations	$ (0.46)	$ 1.12	$ (0.78)
Earnings per share - discontinued operations	7.38	0.26	0.12
Earnings (loss) per share	$ 6.92	$ 1.38	$ (0.66)
Weighted average common shares outstanding—basic	74,149	65,021	64,538
Earnings (loss) per share - diluted:
(Loss) earnings per share - continuing operations	$ (0.46)	$ 0.96	$ (0.78)
Earnings per share - discontinued operations	7.38	0.24	0.12
Earnings per diluted share	$ 6.92	$ 1.20	$ (0.66)
Weighted average common shares outstanding—diluted	74,149	71,721	64,538