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BORROWINGS - Senior Secured Notes Narrative (Details) - USD ($)		3 Months Ended
	Dec. 20, 2024	Jan. 03, 2025	Dec. 29, 2023	Sep. 27, 2024	Mar. 18, 2022	Jul. 15, 2021	Sep. 30, 2020
Debt Instrument
Proceeds from issuance of senior secured notes		$ 126,900,000	$ 0
Long-term debt excluding current maturities, gross		$ 569,300,000		$ 400,100,000
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
Debt issuance cost	1,100,000	$ 3,100,000		2,200,000
Proceeds from issuance of senior secured notes	$ 123,900,000
Long-term debt excluding current maturities, gross		$ 368,000,000.0		$ 243,000,000.0

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