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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Mar. 31, 2010 | Sep. 26, 2021 | Sep. 27, 2020 | Dec. 27, 2020
Income Tax Disclosure [Abstract] |  |  |  |
Federal annual utilization of NOL carryforwards limit, next five years | $ 27.0 |  |  |
Threshold period for change in allowed annual amount of NOL to be recognized | 5 years |  |  |
Federal annual utilization of NOL carryforwards limit, after year five | $ 11.6 |  |  |
Unrecognized tax benefits that if recognized would impact the effective tax rate for continuing operations |  |  |  | $ 25.4
Decrease resulting from current period tax positions |  | $ 0.1 |  |
Expense for interest and penalties |  | 0.5 | $ 0.3 |
Liabilities for uncertain tax positions believed to be reasonably possible to expire within twelve months |  | $ 0.3 |  |

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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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