CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Net sales	$ 2,850,378	$ 3,202,053	$ 3,518,761
Cost of sales	2,174,286	2,124,214	2,179,260
Gross profit	676,092	1,077,839	1,339,501
Selling, general and administrative	396,609	397,544	388,206
Intangible asset amortization	41,924	55,511	57,804
Asset impairment charges	214,386	0	0
Operating income	23,173	624,784	893,491
Interest expense, net	33,269	35,584	35,232
Loss on extinguishment of debt	795	0	0
Other expense, net	7,699	1,963	7,969
(Loss) Income before income taxes	(18,590)	587,237	850,290
Income tax (benefit) expense	(3,415)	114,365	160,391
Net (loss) income	$ (15,175)	$ 472,872	$ 689,899
Net (loss) income per share
Basic (in dollars per share)	$ (0.45)	$ 12.83	$ 17.51
Diluted (in dollars per share)	$ (0.45)	$ 12.69	$ 17.27