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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Income Taxes [Line Items] |  |  |
One-time income tax benefit |  |  | $ 4.5
Interest and penalties included in provision for incomes taxes | $ 0.0 | $ 0.0 | $ 0.1
Accrued interest and penalties | 0.2 | 0.1 |
Unrecognized tax benefits that would impact the effective tax rate if recognized | 0.8 | $ 0.8 |
Deferred tax assets capital loss carryforward | $ 1.1 |  |
Deferred tax assets capital loss carryforward expiration year | 2021 |  |
State and Local Jurisdiction |  |  |
Income Taxes [Line Items] |  |  |
Income tax return examination | In September 2017, the Internal Revenue Service (“IRS”) commenced an examination of the Company’s 2015 consolidated corporate income tax return. The examination was completed in July 2018 resulting in a no change report. As of December 26, 2020, the Company’s 2017, 2018, and 2019 federal income tax returns remain subject to examination by IRS. The Company’s state income tax returns remain subject to examination for three or four years depending on the state’s statute of limitations. |  |
State and Local Jurisdiction | Minimum |  |  |
Income Taxes [Line Items] |  |  |
Income tax return examination period | 3 years |  |
State and Local Jurisdiction | Maximum |  |  |
Income Taxes [Line Items] |  |  |
Income tax return examination period | 4 years |  |

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- Definition Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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