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Income Taxes - Additional Information (Detail) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 03, 2016 USD ($) Store | Dec. 28, 2014 USD ($) Store | Dec. 29, 2013 USD ($) | Dec. 30, 2012 USD ($)
Income Tax Disclosure [Abstract] |  |  |  |
Likelihood of benefit being realized upon settlement | Greater than 50 percent |  |  |
Unrecognized tax benefits | $ 2,115 | $ 2,939 | $ 3,573 | $ 3,472
Unrecognized tax benefits, interest on income taxes expense |  | 100 | 100 |
Unrecognized tax benefits that would impact effective tax rate | 1,700 | 1,700 | 2,100 |
Unrecognized tax benefits, interest on income taxes accrued | $ 100 | $ 700 | $ 600 |
Number of company-owned stores sold | Store | 4 | 14 |  |
Deferred tax asset, valuation allowance | $ 300 | $ 300 |  |
Reversal of interest expense | $ 600 |  |  |

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- Definition Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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- Definition Amount of interest expense accrued for an underpayment of income taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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