Inventories (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 16, 2012	Jun. 18, 2011	Jun. 16, 2012	Jun. 18, 2011	Dec. 31, 2011
Inventory, LIFO Reserve	$ 87,900,000		$ 87,900,000		$ 87,300,000
Inventory, LIFO Reserve, Period Charge	$ 400,000	$ 2,100,000	$ 602,000	$ 2,632,000