Segment Information - Disclosure by Reportable Segment and Reconciliation of Total Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 24, 2023	Jun. 25, 2022	Jun. 24, 2023	Jun. 25, 2022	Sep. 24, 2022
Revenues [Abstract]
Total revenues	$ 278,628	$ 300,332	$ 1,202,599	$ 1,263,834
Operating income (loss):
Total operating income	14,866	14,771	202,860	243,988
Reconciliation to net (loss) income:
Interest expense, net	18,733	15,004	54,598	45,557
Other, net	1,150	2,031	3,231	4,395
Provision for income taxes	244	271	421	171
Net (loss) Income	(5,261)	(2,535)	144,610	193,865
Depreciation and amortization [Abstract]
Total depreciation and amortization	15,537	14,009	45,380	44,356
Assets [Abstract]
Total assets	2,280,425		2,280,425		$ 2,103,726
Operating/Reportable Segments [Member] | Fuel Oil and Refined Fuels [Member]
Revenues [Abstract]
Total revenues	14,086	19,274	82,353	83,741
Operating income (loss):
Total operating income	(12)	(308)	8,417	8,571
Depreciation and amortization [Abstract]
Total depreciation and amortization	405	420	1,233	1,276
Assets [Abstract]
Total assets	47,422		47,422		49,683
Operating/Reportable Segments [Member] | Natural Gas and Electricity [Member]
Revenues [Abstract]
Total revenues	4,926	7,547	25,472	31,165
Operating income (loss):
Total operating income	1,029	792	5,259	5,912
Depreciation and amortization [Abstract]
Total depreciation and amortization	0	6	3	16
Assets [Abstract]
Total assets	11,057		11,057		12,504
Operating/Reportable Segments [Member] | All Other [Member]
Revenues [Abstract]
Total revenues	18,131	12,877	53,796	40,356
Operating income (loss):
Total operating income	(7,507)	(5,998)	(23,369)	(16,790)
Depreciation and amortization [Abstract]
Total depreciation and amortization	2,097	45	5,052	135
Assets [Abstract]
Total assets	243,497		243,497		47,853
Operating/Reportable Segments [Member] | Corporate [Member]
Operating income (loss):
Total operating income	(30,814)	(31,893)	(90,984)	(93,844)
Depreciation and amortization [Abstract]
Total depreciation and amortization	1,279	1,484	4,115	5,377
Assets [Abstract]
Total assets	48,972		48,972		36,429
Operating/Reportable Segments [Member] | Propane [Member]
Revenues [Abstract]
Total revenues	241,485	260,634	1,040,978	1,108,572
Operating income (loss):
Total operating income	52,170	52,178	303,537	340,139
Depreciation and amortization [Abstract]
Total depreciation and amortization	11,756	$ 12,054	34,977	$ 37,552
Assets [Abstract]
Total assets	$ 1,929,477		$ 1,929,477		$ 1,957,257