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BORROWINGS - Senior Secured Notes Narrative (Details) - USD ($) | Dec. 29, 2023 | Sep. 29, 2023 | Mar. 18, 2022 | Jul. 15, 2021 | Sep. 30, 2020
--- | --- | --- | --- | --- | ---
Debt Instrument |  |  |  |  |
Long-term debt excluding current maturities, gross | $ 446,200,000 | $ 446,500,000 |  |  |
Senior Secured Notes | Secured Debt |  |  |  |  |
Debt Instrument |  |  |  |  |
Face amount |  |  |  |  | $ 300,000,000
Contractual interest rate (as a percent) | 7.90% |  |  |  | 7.875%
Debt redeemed |  |  | $ 27,000,000 | $ 30,000,000 |
Long-term debt excluding current maturities, gross | $ 243,000,000 | $ 243,000,000.0 |  |  |

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