CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Operating activities
Net (loss) income	$ (15,175)	$ 472,872	$ 689,899
Adjustments to reconcile net income to net cash provided by operating activities
Asset impairment charges	214,386	0	0
Depreciation and amortization	124,533	121,018	115,524
Amortization of debt issuance costs and original issue discount	2,092	2,151	2,151
Deferred income taxes	(48,038)	3,369	12,860
Loss on extinguishment of debt	795	0	0
Provision for losses on accounts receivable and inventory	2,140	5,096	5,269
Stock-based compensation expense	23,561	20,300	21,101
Amortization of right-of-use assets	35,309	30,194	20,321
Loss on sale of a business	6,243	0	0
Other adjustments to net income	(473)	(1,076)	7,481
Changes in operating assets and liabilities, net of effects from acquisitions
Accounts receivable	40,233	72,732	(30,278)
Inventories	37,355	(31,920)	(42,419)
Prepaid expenses and other current assets	3,705	(18,610)	(11,152)
Accounts payable	(8,420)	(37,558)	32,298
Income taxes	(6,987)	(46,163)	(3,088)
Accrued and other liabilities	29,534	(23,134)	9,800
Lease assets and liabilities	(31,715)	(25,557)	(19,976)
Other, net	(6,316)	5,319	(2,157)
Net cash provided by operating activities	402,762	549,033	807,634
Investing activities
Capital expenditures	(107,108)	(149,861)	(218,888)
Proceeds from sale of properties, plant and equipment	12,766	1,561	123
Proceeds from insurance claims	1,770	0	0
Proceeds from sale of a business	7,021	0	0
Acquisitions of businesses, net of cash acquired	0	(6,036)	(83,385)
Net cash used for investing activities	(85,551)	(154,336)	(302,150)
Financing activities
Issuance of common stock, net of taxes withheld	(6,214)	(17,824)	(14,428)
Repurchase of common stock	(100,026)	(381,040)	(491,033)
Payments for debt financing costs and fees	(7,193)	0	0
Finance lease payments	(2,814)	(1,957)	(1,320)
Dividends paid to shareholders	(44,204)	(34,461)	0
Net cash used for financing activities	(160,451)	(435,282)	(506,781)
Effects of foreign exchange rate changes on cash and cash equivalents	(1,446)	3,856	661
Increase (decrease) in cash and cash equivalents	155,314	(36,729)	(637)
Cash and cash equivalents at beginning of period	351,385	388,114	388,751
Cash and cash equivalents at end of period	506,699	351,385	388,114
Supplementary Cash Flow information
Interest paid	37,286	47,099	43,670
Income taxes paid, net of refunds	(5,666)	66,369	150,934
Capital expenditures, not yet paid	1,685	12,848	7,893
Acquisitions of businesses, not yet paid	0	0	13,625
Operating cash flows from cash paid on operating lease liabilities	21,215	18,526	15,155
Operating lease right-of-use assets obtained in exchange for lease liabilities	$ 11,135	$ 73,294	$ 63,644