Pension Plans and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 23, 2012	Jun. 25, 2011	Jun. 23, 2012	Jun. 25, 2011
Defined Benefit Plan Disclosure [Line Items]
Projected annual contribution requirements related to the Partnership's postretirement health care and life insurance benefit plan for fiscal year	$ 0		$ 0
Contributions made related to the Partnership's postretirement health care and life insurance plan during the period	1,669		1,062
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1,577	1,706	4,733	5,117
Expected return on plan assets	(1,416)	(1,574)	(4,249)	(4,721)
Recognized net actuarial loss	1,318	1,180	3,953	3,540
Net periodic benefit cost	1,479	1,312	4,437	3,936
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service Cost	2	2	5	6
Interest cost	200	214	602	641
Amortization of prior service costs	(122)	(122)	(367)	(367)
Recognized net actuarial loss	0	(9)	0	(27)
Net periodic benefit cost	$ 80	$ 85	$ 240	$ 253