Long-Term Borrowings - Additional Information (Details) - USD ($)		3 Months Ended
	Mar. 03, 2016	Dec. 24, 2016	Mar. 26, 2016	Sep. 24, 2016		Aug. 06, 2013	Aug. 02, 2013
Debt Instrument [Line Items]
Ownership interest in Suburban Energy Finance Corp (in hundredths)		100.00%
Long-term borrowings		$ 1,227,612,000		$ 1,224,502,000	[1]
Consolidated interest coverage ratio, minimum		2.5
Total consolidated leverage ratio, maximum		5.5
Senior secured unconsolidated leverage ratio maximum		3.0
Margin over basis rate (in hundredths)		1.00%
Notional Amount		$ 100,000,000
Consolidated fixed charge coverage ratio, minimum		1.75
Long-term debt maturities, 2017		$ 0
Long-term debt maturities, 2018		0
Long-term debt maturities, 2019		0
Long-term debt maturities, 2020		0
Long-term debt maturities, 2021		449,580,000
Long-term debt maturities, 2021 and thereafter		775,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Standby letters of credit issued under the Revolving Credit Facility		$ 43,256,000
Amended Credit Agreement Due 2021 [Member]
Debt Instrument [Line Items]
Weighted average interest rate (in hundredths)		3.30%
Amended Credit Agreement Due 2021 [Member] | Federal Funds Rate [Member]
Debt Instrument [Line Items]
Description of applicable interest rate on borrowings		Federal Funds Rate
Margin over basis rate (in hundredths)		0.50%
Amended Credit Agreement Due 2021 [Member] | LIBOR [Member]
Debt Instrument [Line Items]
Description of applicable interest rate on borrowings		LIBOR
Margin over basis rate (in hundredths)		1.00%
Amended Credit Agreement Due 2017 [Member]
Debt Instrument [Line Items]
Effective date		Jun. 25, 2013
Termination date		Jan. 05, 2017
Fixed interest rate (in hundredths)		1.63%
7.375% Senior Notes due August 1, 2021 [Member]
Debt Instrument [Line Items]
Date public offering completed		Aug. 01, 2012
Aggregate principal amount		$ 503,443,000
Stated interest rate (in hundredths)		7.375%		7.375%
Maturity date		Aug. 01, 2021
Debt instrument repurchase amount						$ 23,863,000	$ 133,400,000
Percentage of the principal amount repurchase offer under change of control provision (in hundredths)		101.00%
Repurchase of debt due to decline in rating after consummation of change of control, period		90 days
Long-term borrowings		$ 362,412,000		$ 363,172,000	[1]
5.5% Senior Notes due June 1, 2024 [Member]
Debt Instrument [Line Items]
Date public offering completed		May 27, 2014
Aggregate principal amount		$ 525,000,000
Stated interest rate (in hundredths)		5.50%		5.50%
Maturity date		Jun. 01, 2024
Percentage of principal amount at which debt was issued (in hundredths)		100.00%
Percentage of the principal amount repurchase offer under change of control provision (in hundredths)		101.00%
Repurchase of debt due to decline in rating after consummation of change of control, period		90 days
Long-term borrowings		$ 525,000,000		$ 525,000,000	[1]
7.5% Senior Notes due October 1, 2018 [Member]
Debt Instrument [Line Items]
Stated interest rate (in hundredths)		7.50%
5.75% Senior Notes due March 1, 2025 [Member]
Debt Instrument [Line Items]
Date public offering completed		Feb. 25, 2015
Aggregate principal amount		$ 250,000,000
Stated interest rate (in hundredths)		5.75%		5.75%
Maturity date		Mar. 01, 2025
Percentage of principal amount at which debt was issued (in hundredths)		100.00%
Percentage of the principal amount repurchase offer under change of control provision (in hundredths)		101.00%
Repurchase of debt due to decline in rating after consummation of change of control, period		90 days
Long-term borrowings		$ 250,000,000		$ 250,000,000	[1]
7.375% Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Stated interest rate (in hundredths)		7.375%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term borrowings		$ 103,400,000		$ 100,000,000
Revolving Credit Facility [Member] | Amended Credit Agreement Due 2021 [Member]
Debt Instrument [Line Items]
Credit Facility, maximum amount	$ 500,000,000
Revolving credit facility, term	5 years
Write-off unamortized debt origination costs			$ 292,000

[1] Long-term borrowings as of September 24, 2016 reflect the retrospective impact from the adoption of new accounting guidance regarding the balance sheet classification of debt issuance costs (See Note 2).