Effect of Largest Customer in Sales (Detail) (Sales Revenue, Net, Wal-Mart/Sam's Club)	3 Months Ended	6 Months Ended
Jul. 13, 2013	Jul. 14, 2012	Jul. 13, 2013	Jul. 14, 2012
Revenue, Major Customer [Line Items]
Percentage of sales, Total	20.30%	21.70%	20.30%	21.50%
DSD segment
Revenue, Major Customer [Line Items]
Percentage of sales, Total	17.30%	18.40%	17.00%	17.90%
Warehouse segment
Revenue, Major Customer [Line Items]
Percentage of sales, Total	3.00%	3.30%	3.30%	3.60%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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-Section 50

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-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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