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Sale and Closure of Company-Owned Stores - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 30, 2018 USD ($) Store | Dec. 31, 2017 USD ($) Store | Jan. 01, 2017 USD ($) Store
Sales Concentration [Line Items] |  |  |
Number of company-owned stores sold | Store | 12 | 17 |
Pre-tax gain on sale of assets, net of goodwill reduction, charged to general and administrative expenses | $ 5,900 | $ 4,000 |
Reduction of goodwill related to sale of stores | 400 | 600 |
Proceeds from sale of assets | 8,367 | 6,835 | $ 4,936
Number of stores closed | Store |  |  | 1
Reduction of goodwill related to restructuring |  |  | $ 100
Franchisee [Member] |  |  |
Sales Concentration [Line Items] |  |  |
Pre-tax gain on sale of assets, net of goodwill reduction, charged to general and administrative expenses | 100 |  |
Reduction of goodwill related to sale of stores | 100 |  |
Proceeds from sale of assets | $ 300 |  |
Number of stores closed | Store | 2 |  |
Discontinued Operations Disposed of by Sale Two Thousand Seventeen [Member] |  |  |
Sales Concentration [Line Items] |  |  |
Proceeds from sale of assets |  | $ 6,800 |
Discontinued Operations Disposed of by Sale Two Thousand Eighteen [Member] |  |  |
Sales Concentration [Line Items] |  |  |
Proceeds from sale of assets | $ 7,900 |  |

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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3179-108585 + Details
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