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BORROWINGS - Senior Secured Notes Narrative (Details) - USD ($)		12 Months Ended
	Dec. 20, 2024	Oct. 03, 2025	Sep. 27, 2024	Sep. 29, 2023	Mar. 18, 2022	Jul. 15, 2021	Sep. 30, 2020
Debt Instrument
Non-current portion of long-term debt		$ 368,400,000	$ 400,100,000
Proceeds from issuance of senior secured notes		$ 126,900,000	0	$ 0
Senior Secured Notes | Secured Debt
Debt Instrument
Face amount	$ 125,000,000						$ 300,000,000
Contractual interest rate (as a percent)		7.90%					7.875%
Debt redeemed					$ 27,000,000	$ 30,000,000
Non-current portion of long-term debt		$ 368,000,000	243,000,000.0
Debt Issuance Costs, Net	1,100,000	$ 2,400,000	$ 2,200,000
Proceeds from issuance of senior secured notes	$ 123,900,000

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