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Long-Term Debt - Components of Long-term Debt (Details) - USD ($) | 6 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 27, 2021 | Oct. 31, 2020 | Oct. 15, 2020 | Sep. 26, 2020 | Mar. 28, 2020 | Dec. 31, 2017 | Dec. 14, 2017 | Nov. 09, 2015
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Total | $ 978,978,000 |  |  | $ 694,053,000 | $ 693,725,000 |  |  |
Less current portion | (91,000) |  |  | (97,000) | (103,000) |  |  |
Long-term portion | 978,887,000 |  |  | 693,956,000 | 693,622,000 |  |  |
Senior notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Unamortized debt issuance costs | (11,169,000) |  |  | (6,142,000) | (6,524,000) |  |  |
Total | 788,831,000 |  |  | 693,858,000 | 693,476,000 |  |  |
Senior notes | Senior notes, interest at 6.125%, payable semi-annually, principal due November 2023 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Notes | $ 0 |  |  | 400,000,000 | 400,000,000 |  |  | $ 400,000,000
Interest rate | 6.125% |  | 6.125% |  |  |  |  | 6.125%
Senior notes | Senior notes, interest at 5.125%, payable semi-annually, principal due February 2028 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Notes | $ 300,000,000 |  |  | 300,000,000 | 300,000,000 |  | $ 300,000,000 |
Total | $ 296,800,000 |  |  | 296,600,000 | 296,300,000 |  |  |
Interest rate | 5.125% |  |  |  |  | 5.125% | 5.125% |
Senior notes | Senior notes, interest at 4.125%, payable semi-annually, principal due October 2030 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Notes | $ 500,000,000 |  | $ 500,000,000 | 0 | 0 |  |  |
Total | $ 492,400,000 |  |  |  |  |  |  |
Interest rate | 4.125% | 4.125% | 4.125% |  |  |  |  |
Secured debt | Base rate borrowings |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin | 0.00% |  |  |  |  |  |  |
Secured debt | Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.00% to 1.50% or Base Rate plus a margin of 0.0% to 0.50%, final maturity September 2024. |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Total | $ 190,000,000 |  |  | 0 | 0 |  |  |
Secured debt | Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.00% to 1.50% or Base Rate plus a margin of 0.0% to 0.50%, final maturity September 2024. | Minimum | LIBOR-based borrowings |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin | 1.00% |  |  |  |  |  |  |
Secured debt | Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.00% to 1.50% or Base Rate plus a margin of 0.0% to 0.50%, final maturity September 2024. | Minimum | Base rate borrowings |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin | 0.00% |  |  |  |  |  |  |
Secured debt | Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.00% to 1.50% or Base Rate plus a margin of 0.0% to 0.50%, final maturity September 2024. | Maximum | LIBOR-based borrowings |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin | 1.50% |  |  |  |  |  |  |
Secured debt | Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.00% to 1.50% or Base Rate plus a margin of 0.0% to 0.50%, final maturity September 2024. | Maximum | Base rate borrowings |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate margin | 0.50% |  |  |  |  |  |  |
Other notes payable |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Total | $ 147,000 |  |  | $ 195,000 | $ 249,000 |  |  |

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