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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 30, 2017 | Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Income Taxes [Line Items] |  |  |  |  |
Corporate income tax rate |  | 21.00% | 21.00% | 35.00% |
Income tax benefit recorded as estimate to the impact of the act | $ 48,200 |  | $ 5,575 | $ 48,160 |
Adjustments in discrete tax benefit |  | $ 5,600 |  |  |
Adjustments in reduction to federal income tax payable |  | 16,400 |  |  |
Increase to federal deferred tax liabilities |  | 10,800 |  |  |
Gross amount of unrecognized tax benefits | $ 1,259 | 306 | 750 | $ 1,259 | $ 1,754
Unrecognized tax benefits that would impact effective tax rate |  | 300 |  |  |
Unrecognized tax benefit, accrued interest |  | 100 | $ 100 |  |
Domestic Tax Authority |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
Federal net operating loss carryforwards |  | 3,400 |  |  |
State and Local Jurisdiction |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |
State net operating loss carryforwards |  | 5,600 |  |  |
Credit carryforwards |  | $ 4,300 |  |  |
Operating loss carryforwards expiration date |  | Dec. 31, 2037 |  |  |
Unrecognized tax benefits that would impact effective tax rate |  | $ 100 |  |  |

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