Segment Information - Disclosure by Reportable Segment and Reconciliation of Total Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 25, 2022	Jun. 26, 2021	Jun. 25, 2022	Jun. 26, 2021	Sep. 25, 2021
Revenues [Abstract]
Total revenues	$ 300,332	$ 238,085	$ 1,263,834	$ 1,080,514
Operating income (loss):
Total operating income	14,771	8,003	243,988	212,846
Reconciliation to net (loss) income:
Loss on debt extinguishment	0	16,029	0	16,029
Interest expense, net	15,004	16,737	45,557	52,964
Other, net	2,031	1,085	4,395	3,745
Provision for income taxes	271	173	171	936
Net (loss) income	(2,535)	(26,021)	193,865	139,172
Depreciation and amortization [Abstract]
Total depreciation and amortization	14,009	27,254	44,356	82,617
Assets [Abstract]
Total assets	2,115,395		2,115,395		$ 2,051,730
Operating/Reportable Segments [Member] | Fuel Oil and Refined Fuels [Member]
Revenues [Abstract]
Total revenues	19,274	11,314	83,741	59,075
Operating income (loss):
Total operating income	(308)	(433)	8,571	9,800
Depreciation and amortization [Abstract]
Total depreciation and amortization	420	429	1,276	1,225
Assets [Abstract]
Total assets	52,229		52,229		47,039
Operating/Reportable Segments [Member] | Natural Gas and Electricity [Member]
Revenues [Abstract]
Total revenues	7,547	5,835	31,165	23,461
Operating income (loss):
Total operating income	792	1,103	5,912	6,466
Depreciation and amortization [Abstract]
Total depreciation and amortization	6	6	16	18
Assets [Abstract]
Total assets	11,040		11,040		11,275
Operating/Reportable Segments [Member] | All Other [Member]
Revenues [Abstract]
Total revenues	12,877	12,247	40,356	39,337
Operating income (loss):
Total operating income	(5,998)	(5,117)	(16,790)	(14,410)
Depreciation and amortization [Abstract]
Total depreciation and amortization	45	47	135	141
Assets [Abstract]
Total assets	47,818		47,818		17,767
Operating/Reportable Segments [Member] | Corporate [Member]
Operating income (loss):
Total operating income	(31,893)	(29,010)	(93,844)	(86,165)
Depreciation and amortization [Abstract]
Total depreciation and amortization	1,484	1,689	5,377	5,471
Assets [Abstract]
Total assets	43,681		43,681		40,250
Operating/Reportable Segments [Member] | Propane [Member]
Revenues [Abstract]
Total revenues	260,634	208,689	1,108,572	958,641
Operating income (loss):
Total operating income	52,178	41,460	340,139	297,155
Depreciation and amortization [Abstract]
Total depreciation and amortization	12,054	$ 25,083	37,552	$ 75,762
Assets [Abstract]
Total assets	$ 1,960,627		$ 1,960,627		$ 1,935,399