Disaggregation of Revenue - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 30, 2024	Mar. 25, 2023	Mar. 30, 2024	Mar. 25, 2023	Sep. 30, 2023
Disaggregation Of Revenue [Line Items]
Contract with customer, liability revenue recognized	$ 36,308	$ 14,917	$ 73,783	$ 52,031
Contract assets	$ 15,179		$ 15,179		$ 4,844
Propane [Member]
Disaggregation Of Revenue [Line Items]
Segment reporting, percentage of revenue	87.00%	87.00%	87.00%	87.00%
Fuel Oil and Refined Fuels [Member]
Disaggregation Of Revenue [Line Items]
Segment reporting, percentage of revenue	6.00%	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%	2.00%