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Merger and Acquisitions - Additional Information (Detail) | 3 Months Ended | 4 Months Ended | 9 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 02, 2016 USD ($) | Oct. 10, 2015 USD ($) | Jul. 18, 2015 USD ($) | Jan. 03, 2015 USD ($) | Oct. 04, 2014 USD ($) | Jul. 12, 2014 USD ($) | Apr. 25, 2015 USD ($) | Apr. 19, 2014 USD ($) | Dec. 28, 2013 USD ($) | Jan. 02, 2016 USD ($) | Jan. 03, 2015 USD ($) | Jun. 16, 2015 USD ($) Store | Nov. 19, 2013 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ 322,902,000 |  |  | $ 297,280,000 |  |  |  |  | $ 299,186,000 | $ 322,902,000 | $ 297,280,000 |  | $ 36,622,000
Common stock exchange ratio per share | 1.20 |  |  |  |  |  |  |  |  | 1.20 |  |  |
Intangible assets adjustments |  |  |  |  |  | $ 19,300,000 |  |  |  |  |  |  |
Property and equipment adjustments |  |  |  |  |  | (23,000,000) |  |  |  |  |  |  |
Goodwill adjustments |  |  |  |  |  | 3,700,000 |  |  |  |  |  |  |
Merger related expense |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |
Restructuring charges |  |  |  |  |  |  |  |  |  | 400,000 |  |  |
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  | (2,600,000) |  |  |
Non-recurring transaction and integration cost gross |  |  |  |  |  |  |  |  | 26,500,000 |  |  |  |
Non-recurring transaction and integration cost | $ 1,181,000 | $ 4,417,000 | $ 151,000 | 4,547,000 | $ 1,379,000 | $ 2,581,000 | $ 2,684,000 | $ 4,168,000 | 20,993,000 | 8,433,000 | 12,675,000 |  |
Debt extinguishment charges [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Non-recurring transaction and integration cost |  |  |  |  |  |  |  |  | 5,500,000 |  |  |  |
Revolving credit agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized costs, new revolving credit agreement |  |  |  |  |  |  |  |  | 9,400,000 |  |  |  |
Selling, general and administrative expenses [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Non-recurring transaction and integration cost |  |  |  |  |  |  |  |  | 21,000,000 |  |  |  |
Retail [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 190,535,000 |  |  | 165,932,000 |  |  |  |  | 167,838,000 | 190,535,000 | 165,932,000 |  |
Non-recurring transaction and integration cost |  |  |  |  |  |  |  |  |  | 6,396,000 | 4,000 |  |
Food Distribution [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 132,367,000 |  |  | $ 131,348,000 |  |  |  |  | 131,348,000 | 132,367,000 | 131,348,000 |  |
Non-recurring transaction and integration cost |  |  |  |  |  |  |  |  | $ 20,993,000 | 2,037,000 | $ 12,644,000 |  |
Food Distribution Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 36,600,000 |  |  |  |  |  |  |  |  | 36,600,000 |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount | $ 0 |  |  |  |  |  |  |  |  | $ 0 |  |  |
Dan's [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price of assets |  |  |  |  |  |  |  |  |  |  |  | $ 32,600,000 |
Inventory included in total purchase price |  |  |  |  |  |  |  |  |  |  |  | $ 3,700,000 |
Number of stores acquired | Store |  |  |  |  |  |  |  |  |  |  |  | 6 |
Dan's [Member] | Retail [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | $ 24,600,000 |
Dan's [Member] | Food Distribution [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 |

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