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Long-Term Debt - Credit Agreements Narrative (Details) - USD ($) |  |  | 9 Months Ended |
--- | --- | --- | --- | ---
Jul. 08, 2020 | Nov. 08, 2016 | May 30, 2020 | Jul. 01, 2020
Senior Secured Notes | Senior Notes |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount | $ 300,000,000 |  |  |
Interest rate, stated percentage | 6.25% |  |  |
Prior Credit Agreement |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt issuance costs | $ 7,493,000 |  |  |
Debt term |  |  | 8 years |
Term Loan |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Repayments of debt | 249,750,000 |  |  |
Write off of deferred debt issuance cost | $ 4,650,000 |  |  |
Interest rate derivative liabilities at fair value |  |  |  | $ 600,000
ABL Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Credit facility amount |  | $ 192,500,000 |  |
Line of credit facility, commitment fee percentage |  | 0.25% |  |
ABL Credit Facility | Minimum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.25% |  |
ABL Credit Facility | Maximum |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt instrument, basis spread on variable rate |  | 1.75% |  |
ABL Credit Facility | Letter of Credit |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt amount |  | $ 19,250,000 |  |

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