Effect of Largest Customer in Sales (Detail) - Total year to date sales - Customer Concentration Risk	4 Months Ended
Apr. 22, 2017	Apr. 23, 2016
DSD Segment
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	84.00%
Warehouse Segment
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	16.00%
Wal-Mart/Sam's Club
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	19.80%	19.10%
Wal-Mart/Sam's Club \| DSD Segment
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	17.30%	16.40%
Wal-Mart/Sam's Club \| Warehouse Segment
Entity Wide Revenue Major Customer [Line Items]
Concentration risk percentage	2.50%	2.70%

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 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6404-108592

Reference 4: 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=73719730&loc=d3e13537-108611

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