Disaggregation of Revenue - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	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%