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Fair Value Measurements - Additional Information (Details) - USD ($) | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 24, 2022 | Sep. 25, 2021 | Apr. 30, 2021 | Oct. 31, 2020 | Oct. 16, 2020 | Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment charge | $ 11,500,000 | $ 0 | $ 0 |  |  |  |
Carrying value of debt | 1,188,203,000 | 1,186,562,000 |  |  |  |  |
Pet Products Segment |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment charge | 7,500,000 |  |  |  |  |  |
Garden Products Segment |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment charge | 3,900,000 |  |  |  |  |  |
Senior notes |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Carrying value of debt | $ 1,187,769,000 | 1,185,884,000 |  |  |  |  |
Senior notes | Senior notes, interest at 4.125%, payable semi-annually, principal due April 2031 |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Debt, aggregate principal amount |  |  |  | $ 400,000,000 |  |  |
Debt instrument, interest rate | 4.125% |  |  | 4.125% |  |  |
Estimated fair value of senior notes | $ 327,100,000 | 327,600,000 |  |  |  |  |
Carrying value of debt | $ 395,400,000 | 394,800,000 |  |  |  |  |
Senior notes | Senior notes, interest at 4.125%, payable semi-annually, principal due October 2030 |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Debt, aggregate principal amount |  |  |  |  | $ 500,000,000 | $ 500,000,000 |
Debt instrument, interest rate | 4.125% |  |  |  | 4.125% | 4.125% |
Estimated fair value of senior notes | $ 417,000,000 | 407,600,000 |  |  |  |  |
Carrying value of debt | 494,400,000 | 493,600,000 |  |  |  |  |
Senior notes | Senior Notes Due February 2028 |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Debt, aggregate principal amount |  |  |  |  |  |  | $ 300,000,000
Debt instrument, interest rate |  |  |  |  |  |  | 5.125%
Estimated fair value of senior notes | 279,500,000 | 272,200,000 |  |  |  |  |
Carrying value of debt | $ 298,000,000 | $ 297,500,000 |  |  |  |  |

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