Disaggregation of Revenue - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 26, 2022	Mar. 27, 2021	Mar. 26, 2022	Mar. 27, 2021	Sep. 25, 2021
Disaggregation Of Revenue [Line Items]
Contract with customer, liability revenue recognized	$ 35,486	$ 32,538	$ 68,774	$ 64,957
Contract assets	$ 26,275		$ 26,275		$ 6,004
Propane [Member]
Disaggregation Of Revenue [Line Items]
Segment reporting, percentage of revenue	88.00%	88.00%	88.00%	88.00%
Fuel Oil and Refined Fuels [Member]
Disaggregation Of Revenue [Line Items]
Segment reporting, percentage of revenue	7.00%	7.00%	7.00%	7.00%
Natural Gas and Electricity [Member]
Disaggregation Of Revenue [Line Items]
Segment reporting, percentage of revenue	2.00%	2.00%	2.00%	2.00%