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Assets Held for Sale - Additional Information (Detail) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2016 USD ($) Facility | Jan. 03, 2015 USD ($) | Jul. 12, 2014 USD ($) | Dec. 31, 2016 USD ($) Facility | Jan. 02, 2016 USD ($) | Jan. 03, 2015 USD ($) | Aug. 13, 2014 USD ($)
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-Sale | $ 5,300,000 |  | $ 1,900,000 |  | $ 2,300,000 | $ 5,800,000 |
Cash consideration of discontinued operation |  |  |  |  |  |  | $ 8,400,000
Assets Held for Sale | 36,976,000 |  |  | $ 36,976,000 | 36,191,000 |  | $ 7,600,000
Goodwill impairment loss |  |  | 2,600,000 | 0 | 0 |  |
Gain on divestiture of discontinued operation |  |  | 1,800,000 |  |  |  |
Ft. Worth, Texas, tortilla facility | Property, Plant and Equipment |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-Sale |  |  |  |  |  | $ 3,500,000 |
Gain on property plan and equipment |  |  | 800,000 |  |  |  |
Cost incurred in severance and inventory |  |  | $ 800,000 |  |  |  |
Acquired Hostess Bread Assets Classified as Held for Sale |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |
Impairment of Long-Lived Assets Held-for-Sale | 4,600,000 | $ 5,800,000 |  |  |  |  |
Acquired Hostess Bread Assets Plants and Depots |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |
Assets Held for Sale | $ 479,000 |  |  | $ 479,000 | $ 3,082,000 |  |
Acquired Hostess Bread Assets Plants and Depots | Plants |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |
Number of Acquired Hostess Bread Assets to be sold | Facility | 20 |  |  | 20 |  |  |
Acquired Hostess Bread Assets Plants and Depots | Depots |  |  |  |  |  |  |
Long Lived Assets Held For Sale [Line Items] |  |  |  |  |  |  |
Number of Acquired Hostess Bread Assets to be sold | Facility | 36 |  |  | 36 |  |  |

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