Unit-Based Compensation Arrangements (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended						0 Months Ended
	Sep. 27, 2014 Restricted Stock Units (RSUs) [Member]	Sep. 28, 2013 Restricted Stock Units (RSUs) [Member]	Sep. 29, 2012 Restricted Stock Units (RSUs) [Member]	Sep. 27, 2014 Long-Term Incentive Plan [Member]	Sep. 28, 2013 Long-Term Incentive Plan [Member]	Sep. 29, 2012 Long-Term Incentive Plan [Member]	Oct. 01, 2013 2014 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted Unit Plans, terms of award	Unless otherwise stipulated by the Compensation Committee of the Partnership’s Board of Supervisors on or before the grant date, all restricted unit awards granted after the date of the amendment will vest 33.33% on each of the first three anniversaries of the award grant date. Prior to the August 6, 2013 amendment, unless otherwise stipulated by the Compensation Committee of the Partnership’s Board of Supervisors on or before the grant date, restricted units issued under the Restricted Unit Plans vest over time with 25% of the Common Units vesting at the end of each of the third and fourth anniversaries of the grant date and the remaining 50% of the Common Units vesting at the end of the fifth anniversary of the grant date. The Restricted Unit Plans participants are not eligible to receive quarterly distributions on, or vote, their respective restricted units until vested. Restricted units cannot be sold or transferred prior to vesting. The value of the restricted unit is established by the market price of the Common Unit on the date of grant, net of estimated future distributions during the vesting period. Restricted units are subject to forfeiture in certain circumstances as defined in the Restricted Unit Plans.
Total number of Common Units authorized for issuance (in units)	1,902,122
Weighted-average recognition period of compensation cost	1 year 4 months 24 days
Unrecognized compensation cost	$ 8,255
Compensation expense	7,390	3,888	4,059
Long-Term Incentive Plan [Abstract]
Long-Term Incentive Plan, terms of award				The Partnership has a non-qualified, unfunded long-term incentive plan for officers and key employees (the “LTIP”) which provides for payment, in the form of cash, of an award of equity-based compensation at the end of a three-year performance period.
Compensation expense				120	1,439	(340)
Cash payouts				$ 0	$ 0	$ 3,336
Units [Rollforward]
Outstanding, beginning of period (in units)	527,627	442,851	485,423
Granted (in units)	256,273	200,933	108,674
Forfeited (in units)	(3,119)	(3,497)	(12,225)
Issued (in units)	(85,854)	(112,660)	(139,021)
Outstanding, end of period (in units)	694,927	527,627	442,851
Weighted Average Grant Date Fair Value Per Unit [Abstract]
Outstanding, beginning of period (in dollars per unit)	$ 29.30	$ 32.68	$ 32.71
Granted (in dollars per unit)	$ 37.43	$ 23.42	$ 32.60
Forfeited (in dollars per unit)	$ (28.39)	$ (32.15)	$ (30.78)
Issued (in dollars per unit)	$ (31.23)	$ (32.01)	$ (33.14)
Outstanding, end of period (in dollars per unit)	$ 32.07	$ 29.30	$ 32.68
Measurement period of average distribution coverage ratio (in years)							3 years