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Income Taxes - Tax Reforms (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2018 | Dec. 31, 2017 | Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Federal statutory rate (as a percent) |  | 35.00% | 35.00% | 35.00% | 35.00%
Income tax provision |  |  | $ 3.6 |  |
Accelerated depreciation deductions (as a percent) |  |  | 100.00% |  |
Accelerated depreciation claimed |  |  | $ 2.9 |  |
Forecast |  |  |  |  |
Federal statutory rate (as a percent) | 21.00% |  |  |  |

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