Segment Information - Disclosure by Reportable Segment and Reconciliation of Total Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 29, 2024	Jun. 24, 2023	Jun. 29, 2024	Jun. 24, 2023	Sep. 30, 2023
Revenues:
Total revenues	$ 254,610	$ 278,628	$ 1,118,531	$ 1,202,599
Operating income (loss):
Total operating income	8,190	14,866	193,798	202,860
Reconciliation to net (loss) income:
Loss on debt extinguishment	0	0	215	0
Interest expense, net	18,429	18,733	56,540	54,598
Other, net	6,709	1,150	17,756	3,231
Provision for income taxes	243	244	524	421
Net (loss) income	(17,191)	(5,261)	118,763	144,610
Depreciation and amortization:
Total depreciation and amortization	16,379	15,537	49,497	45,380
Assets:
Total assets	2,283,554		2,283,554		$ 2,270,475
Operating/Reportable Segments [Member] | Propane [Member]
Revenues:
Total revenues	220,045	241,485	970,967	1,040,978
Operating income (loss):
Total operating income	44,458	52,170	301,487	303,537
Depreciation and amortization:
Total depreciation and amortization	11,940	11,756	35,534	34,977
Assets:
Total assets	1,918,736		1,918,736		1,924,304
Operating/Reportable Segments [Member] | Fuel Oil and Refined Fuels [Member]
Revenues:
Total revenues	10,954	14,086	66,447	82,353
Operating income (loss):
Total operating income	(442)	(12)	7,617	8,417
Depreciation and amortization:
Total depreciation and amortization	273	405	1,019	1,233
Assets:
Total assets	44,998		44,998		46,341
Operating/Reportable Segments [Member] | Natural Gas and Electricity [Member]
Revenues:
Total revenues	5,322	4,926	20,528	25,472
Operating income (loss):
Total operating income	1,771	1,029	5,917	5,259
Depreciation and amortization:
Total depreciation and amortization	0	0	0	3
Assets:
Total assets	10,471		10,471		11,255
Operating/Reportable Segments [Member] | All Other [Member]
Revenues:
Total revenues	18,289	18,131	60,589	53,796
Operating income (loss):
Total operating income	(7,614)	(7,507)	(21,970)	(23,369)
Depreciation and amortization:
Total depreciation and amortization	2,725	2,097	8,132	5,052
Assets:
Total assets	244,895		244,895		239,691
Operating/Reportable Segments [Member] | Corporate [Member]
Operating income (loss):
Total operating income	(29,983)	(30,814)	(99,253)	(90,984)
Depreciation and amortization:
Total depreciation and amortization	1,441	$ 1,279	4,812	$ 4,115
Assets:
Total assets	$ 64,454		$ 64,454		$ 48,884