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Income Taxes - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 30, 2018 | Dec. 29, 2017 | Dec. 31, 2018
Income Taxes [Line Items] |  |  |  |
Effective S Corporation tax rate percentage | 12.35% | 15.54% |  |
U.S. corporate tax rate | 21.00% |  | 35.00% |
Deferred tax assets valuation allowance | $ 6.7 |  |  |
Liability for income taxes associated with uncertain tax positions | 10.7 |  |  | $ 9.9
Minimum [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Estimated effects of change in tax status based upon forecasted temporary differences | 55.0 |  |  |
Maximum [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Estimated effects of change in tax status based upon forecasted temporary differences | $ 61.0 |  |  |
California Franchise Tax Board |  |  |  |
Income Taxes [Line Items] |  |  |  |
S Corporation franchise tax rate on income | 1.50% |  |  |

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