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Disaggregation of Revenue - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2023 | Sep. 24, 2022 | Sep. 25, 2021
Disaggregation Of Revenue [Line Items] |  |  |
Contract with customer, liability revenue recognized | $ 64,508 | $ 75,149 | $ 72,955
Contract assets | $ 4,844 | $ 7,953 |
Propane [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Segment reporting, percentage of revenue | 86.00% | 86.00% | 86.00%
Fuel Oil and Refined Fuels [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Segment reporting, percentage of revenue | 6.00% | 6.00% | 6.00%
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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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 + Details
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