Pension Plans and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 24, 2012	Mar. 30, 2013	Mar. 24, 2012
Pension Benefits [Member]
Net periodic benefit cost [Abstract]
Interest cost	$ 1,307	$ 1,577	$ 2,614	$ 3,155
Expected return on plan assets	(1,320)	(1,416)	(2,641)	(2,833)
Recognized net actuarial loss	1,321	1,318	2,643	2,636
Net periodic benefit cost	1,308	1,479	2,616	2,958
Projected annual contribution requirements related to the Partnership's postretirement health care and life insurance benefit plan for fiscal year	0		0
Postretirement Benefits [Member]
Net periodic benefit cost [Abstract]
Service Cost	2	2	4	3
Interest cost	146	200	293	401
Amortization of prior service costs	(122)	(122)	(245)	(244)
Recognized net actuarial loss	0	0	0	0
Net periodic benefit cost	26	80	52	160
Projected annual contribution requirements related to the Partnership's postretirement health care and life insurance benefit plan for fiscal year	1,427		1,427
Employer contribution for postretirement health care and life insurance			$ 677