Effect of Largest Customer in Sales (Detail) (Wal-Mart/Sam's Club)	3 Months Ended		9 Months Ended
	Oct. 06, 2012	Oct. 08, 2011	Oct. 06, 2012	Oct. 08, 2011
Revenue, Major Customer [Line Items]
Percentage of sales, Total	19.80%	21.30%	21.00%	21.80%
DSD
Revenue, Major Customer [Line Items]
Percentage of sales, Total	16.90%	17.50%	17.60%	17.90%
Warehouse Delivery
Revenue, Major Customer [Line Items]
Percentage of sales, Total	2.90%	3.80%	3.40%	3.90%