INCOME TAXES (Tables)

12 Months Ended

Sep. 30, 2025

Income Tax Disclosure [Abstract]

Schedule of Components of Income (Loss) from Continuing Operations and Income Tax Expense

Significant components of income before income taxes and income tax expense for the fiscal years ended September 30, 2025, September 30, 2024 and September 30, 2023 consisted of the following:

(in thousands)	September 30, 2025		September 30, 2024		September 30, 2023
Components of income before income taxes:
United States	$	(42,814)	$	545,826	$	817,853
Non-U.S	24,224		41,411		32,437
(Loss) Income before income taxes	$	(18,590)	$	587,237	$	850,290
Income tax expense:
Current:
United States:
Federal	$	26,763	$	82,125	$	110,714
State	9,115		16,012		25,556
Non-U.S:	8,745		12,859		11,261
Current income tax expense	$	44,623	$	110,996	$	147,531
Deferred:
United States:
Federal	$	(40,278)	$	4,100	$	12,670
State	(6,240)		351		1,274
Non-U.S:	(1,520)		(1,082)		(1,085)
Deferred income (benefit) tax expense	(48,038)		3,369		12,860
Income tax expense	$	(3,415)	$	114,365	$	160,391

Schedule of Federal Income Tax Rate and Effective Income Tax Rate Reconciliation

Differences between the statutory federal income tax rate and effective income tax rate are summarized below:

(in thousands)	September 30, 2025		September 30, 2024		September 30, 2023
Statutory federal tax	21	%	21	%	21	%
Adjustments to reconcile to the effective income tax rate:
State income taxes	1	%	2	%	3	%
Stock-based compensation	(5)	%	(2)	%	(1)	%
Foreign rate differential	(8)	%	—	%	—	%
Disallowed loss on sale of business	(23)	%	—	%	—	%
Solar tax credits	—	%	—	%	(5)	%
General business credits	5	%	—	%	—	%
Nondeductible executive compensation	(11)	%	1	%	—	%
Nondeductible goodwill	(16)	%	—	%	—	%
Pillar 2 Income Taxes	(1)	%	—	%	—	%
Foreign-derived intangible income	1	%	—	%	—	%
Non-deductible meals & entertainment	(2)	%	—	%	—	%
Changes in valuation allowances	1	%	—	%	—	%
Changes in reserves for uncertain tax positions	(7)	%	—	%	—	%
Nontaxable solar tax credits	66	%	(3)	%	—	%
Return to provision	(2)	%	—	%	—	%
Other	(2)	%	—	%	1	%
Effective income tax rate	18	%	19	%	19	%

Schedule of Components of Net Deferred Income Tax Assets

The components of the net deferred income tax assets are as follows:

(in thousands)	September 30, 2025		September 30, 2024
Deferred tax assets:
Accrued liabilities and reserves	$	38,820	$	39,232
Tax loss and credit carryforwards	20,506		20,436
Capitalized research and development	10,854		8,446
Inventory	17,089		14,274
Lease obligations	42,544		46,179
Other	1,939		1,121
	$	131,752	$	129,688
Deferred tax liabilities:
Property, plant and equipment	$	(31,773)	$	(40,373)
Intangible assets	(11,961)		(43,487)
Right-of-use assets, net	(38,932)		(44,722)
Other	(5,820)		(6,609)
	$	(88,486)	$	(135,191)
Net deferred tax liability before valuation allowance	43,266		(5,503)
Valuation allowance	(20,854)		(20,517)
Net deferred tax liability	$	22,412	$	(26,020)

Schedule of Reconciliation of Unrecognized Tax Benefits, Excluding Interest and Penalties

A reconciliation of the beginning and ending amount of unrecognized tax benefit, excluding interest and penalties, is as follows:

(in thousands)	For the period from September 30, 2022 to September 30, 2025
Balance as of September 30, 2022	$	985
Additions based on tax positions related to prior years	(75)
Additions based on tax positions related to current year	1,792
Settlements	(121)
Balance as of September 30, 2023	2,581
Additions based on tax positions related to prior years	84
Additions based on tax positions related to current year	1,287
Settlements	(585)
Balance as of September 30, 2024	3,367
Additions based on tax positions related to prior years	578
Additions based on tax positions related to current year	754
Expiration of statute of limitations	(182)
Balance as of September 30, 2025	$	4,517

Schedule of Tax Years Subject to Examination

The following tax years remain subject to examination by the major tax jurisdictions as follows:

Jurisdiction	Years Open to Audit
United States	2022, 2023 and 2024