Disaggregation of Revenue - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2023	Dec. 24, 2022	Sep. 30, 2023
Disaggregation Of Revenue [Line Items]
Contract with customer, liability revenue recognized	$ 37,474	$ 37,115
Contract assets	$ 6,119		$ 4,844
Propane [Member]
Disaggregation Of Revenue [Line Items]
Segment reporting, percentage of revenue	86.00%	86.00%
Fuel Oil and Refined Fuels [Member]
Disaggregation Of Revenue [Line Items]
Segment reporting, percentage of revenue	7.00%	7.00%
Natural Gas and Electricity [Member]
Disaggregation Of Revenue [Line Items]
Segment reporting, percentage of revenue	2.00%	2.00%