Segment Information - Disclosure by Reportable Segment and Reconciliation of Total Operating Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2023	Dec. 24, 2022	Sep. 30, 2023
Revenues:
Total revenues	$ 365,834	$ 397,470
Operating income (loss):
Total operating income	48,748	62,315
Reconciliation to net (loss) income:
Interest expense, net	18,192	15,994
Other, net	5,853	975
Provision for (benefit from) income taxes	249	(48)
Net Income	24,454	45,394
Depreciation and amortization:
Total depreciation and amortization	16,393	13,779
Assets:
Total assets	2,319,603		$ 2,270,475
Operating/Reportable Segments [Member] | Propane [Member]
Revenues:
Total revenues	313,358	342,353
Operating income (loss):
Total operating income	87,176	94,408
Depreciation and amortization:
Total depreciation and amortization	11,859	11,890
Assets:
Total assets	1,952,507		1,924,304
Operating/Reportable Segments [Member] | Fuel Oil and Refined Fuels [Member]
Revenues:
Total revenues	23,898	30,141
Operating income (loss):
Total operating income	2,172	2,082
Depreciation and amortization:
Total depreciation and amortization	444	409
Assets:
Total assets	51,192		46,341
Operating/Reportable Segments [Member] | Natural Gas and Electricity [Member]
Revenues:
Total revenues	6,493	8,690
Operating income (loss):
Total operating income	1,568	1,092
Depreciation and amortization:
Total depreciation and amortization	0	3
Assets:
Total assets	12,461		11,255
Operating/Reportable Segments [Member] | All Other [Member]
Revenues:
Total revenues	22,085	16,286
Operating income (loss):
Total operating income	(7,181)	(5,775)
Depreciation and amortization:
Total depreciation and amortization	2,700	43
Assets:
Total assets	241,055		239,691
Operating/Reportable Segments [Member] | Corporate [Member]
Operating income (loss):
Total operating income	(34,987)	(29,492)
Depreciation and amortization:
Total depreciation and amortization	1,390	$ 1,434
Assets:
Total assets	$ 62,388		$ 48,884