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, 2016	Jun. 27, 2015	Jun. 25, 2016	Jun. 27, 2015	Sep. 26, 2015
Revenues [Abstract]
Total revenues	$ 205,099	$ 220,302	$ 885,096	$ 1,242,635
Operating (loss) income [Abstract]:
Total operating (loss) income	(10,780)	(21,834)	131,777	225,725
Reconciliation to net (loss) income:
Loss on debt extinguishment	0	0	292	15,072
Interest expense, net	18,638	18,933	56,383	58,643
Provision for income taxes	180	185	423	521
Net (loss) income	(29,598)	(40,952)	74,679	151,489
Depreciation and amortization [Abstract]
Total depreciation and amortization	32,288	32,730	97,076	98,588
Assets [Abstract]
Total assets	2,361,385		2,361,385		$ 2,485,730
Operating/Reportable Segments [Member] | Propane [Member]
Revenues [Abstract]
Total revenues	172,322	181,259	752,013	1,034,525
Operating (loss) income [Abstract]:
Total operating (loss) income	14,182	7,352	199,042	299,693
Depreciation and amortization [Abstract]
Total depreciation and amortization	27,324	27,118	81,949	81,759
Assets [Abstract]
Total assets	2,170,839		2,170,839		2,209,343
Operating/Reportable Segments [Member] | Fuel Oil and Refined Fuels [Member]
Revenues [Abstract]
Total revenues	12,459	17,043	61,961	116,399
Operating (loss) income [Abstract]:
Total operating (loss) income	(854)	(662)	7,585	10,218
Depreciation and amortization [Abstract]
Total depreciation and amortization	673	896	2,055	2,457
Assets [Abstract]
Total assets	53,625		53,625		58,077
Operating/Reportable Segments [Member] | Natural Gas and Electricity [Member]
Revenues [Abstract]
Total revenues	10,596	11,861	38,232	56,109
Operating (loss) income [Abstract]:
Total operating (loss) income	1,969	2,349	8,665	12,564
Depreciation and amortization [Abstract]
Total depreciation and amortization	0	2	3	6
Assets [Abstract]
Total assets	12,640		12,640		13,253
Operating/Reportable Segments [Member] | All Other [Member]
Revenues [Abstract]
Total revenues	9,722	10,139	32,890	35,602
Operating (loss) income [Abstract]:
Total operating (loss) income	(6,014)	(7,352)	(18,882)	(18,319)
Depreciation and amortization [Abstract]
Total depreciation and amortization	73	70	234	219
Assets [Abstract]
Total assets	2,374		2,374		2,888
Operating/Reportable Segments [Member] | Corporate [Member]
Operating (loss) income [Abstract]:
Total operating (loss) income	(20,063)	(23,521)	(64,633)	(78,431)
Depreciation and amortization [Abstract]
Total depreciation and amortization	4,218	$ 4,644	12,835	$ 14,147
Assets [Abstract]
Total assets	$ 121,907		$ 121,907		$ 202,169