Earnings per Unit (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 01, 2012	Jun. 26, 2011	Jul. 01, 2012	Jun. 26, 2011	Jul. 01, 2012	Jun. 26, 2011
Basic weighted average units outstanding	55,481,000	55,346,000	55,433,000	55,341,000	55,389,000	55,338,000
Effect of dilutive units:
Unit options	2,000	0	0	0	3,000	0
Phantom units	335,000	479,000	0	0	452,000	0
Diluted weighted average units outstanding	55,818,000	55,825,000	55,433,000	55,341,000	55,844,000	55,338,000
Net income (loss) per unit - basic	0.65	0.08	(0.52)	(1.46)	2.21	(1.24)
Net income (loss) per limited partner unit	0.65	0.08	(0.52)	(1.46)	2.19	(1.24)
Unit Options [Member]
Effect of dilutive units:
Antidilutive securities excluded from the computation of earnings per unit	66,000	55,000	31,000	71,000	41,500	212,000