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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 26, 2020 | Sep. 28, 2019 | Sep. 26, 2020 | Sep. 28, 2019 | Dec. 28, 2019
Income Taxes [Line Items] |  |  |  |  |
Accrued interest and penalties | $ 0.2 |  | $ 0.2 |  | $ 0.1
Unrecognized income tax benefits | $ 0.8 |  | $ 0.8 |  | $ 0.8
Effective Income Tax Rate Reconciliation, Percent, Total | 20.80% | 24.10% | 21.10% | 24.10% |
State and Local Jurisdiction | Minimum |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Income tax return examination period |  |  | 0 years |  |
State and Local Jurisdiction | Maximum |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Income tax return examination period |  |  | 4 years |  |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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