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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2010 | Jul. 01, 2018 | Jun. 25, 2017 | Dec. 31, 2017
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 |  |  |  | $ 14.0
Unrecognized tax benefits increase current year positions |  | $ 1.0 |  |
Discontinued operation, unrecognized tax benefits |  |  |  | $ 1.6
Unrecognized tax benefits, decrease from discontinued operations |  | 1.6 |  |
Expense for interest and penalties |  | 0.4 | $ 0.2 |
Decrease in interest and penalties |  | 0.8 |  |
Liabilities for uncertain tax positions that could expire within twelve months |  | $ 0.4 |  |

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