Effect of Largest Customer in Sales (Detail) - Total year to date sales - Customer Concentration Risk	3 Months Ended		6 Months Ended
	Jul. 16, 2016	Jul. 18, 2015	Jul. 16, 2016	Jul. 18, 2015
Wal-Mart/Sam's Club
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	20.20%	19.70%	19.60%	19.50%
DSD Segment
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage			84.00%
DSD Segment | Wal-Mart/Sam's Club
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	17.60%	17.20%	16.90%	17.00%
Warehouse Segment
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage			16.00%
Warehouse Segment | Wal-Mart/Sam's Club
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	2.60%	2.50%	2.70%	2.50%