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, 2017	Jun. 25, 2016	Jun. 24, 2017	Jun. 25, 2016	Sep. 24, 2016
Revenues [Abstract]
Total revenues	$ 222,895	$ 205,099	$ 990,780	$ 885,096
Operating (loss) income:
Total operating (loss) income	(11,062)	(10,780)	145,280	131,777
Reconciliation to net (loss) income:
Loss on debt extinguishment	0	0	1,567	292
Interest expense, net	18,502	18,638	54,820	56,383
Provision for income taxes	152	180	308	423
Net (loss) income	(29,716)	(29,598)	88,585	74,679
Depreciation and amortization [Abstract]
Total depreciation and amortization	31,825	32,288	95,756	97,076
Assets [Abstract]
Total assets	2,191,300		2,191,300		$ 2,282,299
Operating/Reportable Segments [Member] | Propane [Member]
Revenues [Abstract]
Total revenues	188,406	172,322	843,519	752,013
Operating (loss) income:
Total operating (loss) income	11,323	14,182	201,332	199,042
Depreciation and amortization [Abstract]
Total depreciation and amortization	27,787	27,324	83,243	81,949
Assets [Abstract]
Total assets	2,081,268		2,081,268		2,141,108
Operating/Reportable Segments [Member] | Fuel Oil and Refined Fuels [Member]
Revenues [Abstract]
Total revenues	12,886	12,459	69,612	61,961
Operating (loss) income:
Total operating (loss) income	199	(854)	9,875	7,585
Depreciation and amortization [Abstract]
Total depreciation and amortization	625	673	1,923	2,055
Assets [Abstract]
Total assets	51,591		51,591		53,266
Operating/Reportable Segments [Member] | Natural Gas and Electricity [Member]
Revenues [Abstract]
Total revenues	11,923	10,596	44,229	38,232
Operating (loss) income:
Total operating (loss) income	2,806	1,969	11,461	8,665
Depreciation and amortization [Abstract]
Total depreciation and amortization	0	0	0	3
Assets [Abstract]
Total assets	12,592		12,592		13,415
Operating/Reportable Segments [Member] | All Other [Member]
Revenues [Abstract]
Total revenues	9,680	9,722	33,420	32,890
Operating (loss) income:
Total operating (loss) income	(5,747)	(6,014)	(16,139)	(18,882)
Depreciation and amortization [Abstract]
Total depreciation and amortization	76	73	222	234
Assets [Abstract]
Total assets	1,907		1,907		2,185
Operating/Reportable Segments [Member] | Corporate [Member]
Operating (loss) income:
Total operating (loss) income	(19,643)	(20,063)	(61,249)	(64,633)
Depreciation and amortization [Abstract]
Total depreciation and amortization	3,337	$ 4,218	10,368	$ 12,835
Assets [Abstract]
Total assets	$ 43,942		$ 43,942		$ 72,325