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Merger - Additional Information (Detail) (USD $) | 3 Months Ended |  |  |  | 9 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 12, 2014 | Oct. 04, 2014 | Dec. 28, 2013 | Jul. 12, 2014 Food Distribution Segment [Member] | Oct. 04, 2014 Fair Value Adjustments [Member]
Business Acquisition [Line Items] |  |  |  |  |
Intangible assets adjustments | $ 19,300,000 |  |  |  | $ 7,000,000
Property and equipment adjustments | (23,000,000) |  |  |  |
Goodwill adjustments | 3,700,000 |  |  |  |
Goodwill |  | $ 297,352,000 | $ 299,186,000 | $ 36,600,000 |

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