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Sales by Product Category in Each Reportable Segment (Detail) - USD ($) $ in Thousands | 4 Months Ended
--- | ---
Apr. 21, 2018 | Apr. 22, 2017
Segment Reporting Information [Line Items] |  |
Sales | $ 1,206,453 | $ 1,187,649
DSD Segment |  |
Segment Reporting Information [Line Items] |  |
Sales | 1,015,484 | 999,860
Warehouse Segment |  |
Segment Reporting Information [Line Items] |  |
Sales | 190,969 | 187,789
Branded Retail |  |
Segment Reporting Information [Line Items] |  |
Sales | 711,180 | 694,743
Branded Retail | DSD Segment |  |
Segment Reporting Information [Line Items] |  |
Sales | 664,134 | 645,943
Branded Retail | Warehouse Segment |  |
Segment Reporting Information [Line Items] |  |
Sales | 47,046 | 48,800
Store Branded Retail |  |
Segment Reporting Information [Line Items] |  |
Sales | 172,576 | 172,224
Store Branded Retail | DSD Segment |  |
Segment Reporting Information [Line Items] |  |
Sales | 136,684 | 137,533
Store Branded Retail | Warehouse Segment |  |
Segment Reporting Information [Line Items] |  |
Sales | 35,892 | 34,691
Non-Retail and Other |  |
Segment Reporting Information [Line Items] |  |
Sales | 322,697 | 320,682
Non-Retail and Other | DSD Segment |  |
Segment Reporting Information [Line Items] |  |
Sales | 214,666 | 216,384
Non-Retail and Other | Warehouse Segment |  |
Segment Reporting Information [Line Items] |  |
Sales | $ 108,031 | $ 104,298

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