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Disaggregation of Revenue - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
Disaggregation Of Revenue [Line Items] |  |  |
Contract with customer, liability revenue recognized | $ 87,056 | $ 84,687 | $ 64,508
Contract assets | $ 5,806 | $ 3,901 |
Propane [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Segment reporting, percentage of revenue | 88.00% | 88.00% | 88.00%
Fuel Oil and Refined Fuels [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Segment reporting, percentage of revenue | 5.00% | 5.00% | 5.00%
Natural Gas and Electricity [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Segment reporting, percentage of revenue | 2.00% | 2.00% | 2.00%

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