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Income Taxes - Additional Information (Detail) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 01, 2017 USD ($) | Jan. 03, 2016 USD ($) Store | Dec. 28, 2014 USD ($) Store | Dec. 29, 2013 USD ($)
Income Tax Disclosure [Abstract] |  |  |  |
Likelihood of benefit being realized upon settlement | Greater than 50 percent |  |  |
Number of company-owned stores sold | Store |  | 4 | 14 |
Deferred tax asset, valuation allowance |  | $ 300 | $ 300 |
Unrecognized tax benefits | $ 1,954 | 2,115 | 2,939 | $ 3,573
Unrecognized tax benefits, interest on income taxes expense |  |  | 100 |
Unrecognized tax benefits that would impact effective tax rate | 1,600 | 1,700 | 1,700 |
Unrecognized tax benefits, interest on income taxes accrued | $ 100 | 100 | $ 700 |
Reversal of interest expense |  | $ 600 |  |

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