Pension Plans and Other Postretirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 28, 2013	Dec. 29, 2012
Components of net periodic benefit costs included in operating expenses [Abstract]
Projected annual contribution requirements related to the Partnership's postretirement health care and life insurance benefit plan for fiscal year	$ 1,337
Employer contribution for postretirement health care and life insurance	216
Partnership established accrual for estimated obligation to certain MEPPs	6,953
Number of voluntary partial withdrawal from multi employer pension plans	1
Number of full withdrawal from multi employer pension plans	4
Pension Benefits [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Service cost	0	0
Interest cost	1,443	1,307
Expected return on plan assets	(1,275)	(1,320)
Amortization of prior service costs	0	0
Amortization of net loss (gain)	1,123	1,321
Net periodic benefit cost	1,291	1,308
Postretirement Benefits [Member]
Components of net periodic benefit costs included in operating expenses [Abstract]
Service cost	1	2
Interest cost	160	146
Expected return on plan assets	0	0
Amortization of prior service costs	(122)	(122)
Amortization of net loss (gain)	(46)	0
Net periodic benefit cost	$ (7)	$ 26