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Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands |  | 8 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Aug. 25, 2018 | Aug. 31, 2019 | Aug. 25, 2018 | Aug. 26, 2017 | Aug. 27, 2016
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
U.S. corporate income tax rate | 35.00% | 21.00% |  | 25.90% | 35.00% | 35.00%
Tax benefit from reduction of U.S. statutory rate |  |  |  | $ 119,200 |  |
Excess tax benefits from stock option exercises |  |  |  | 31,300 | $ 31,200 |
Tax cuts and jobs act of 2017, incomplete accounting, provisional income tax expense (benefit) |  |  |  | (157,300) |  |
Tax cuts and jobs act of 2017, transition tax, provisional income tax expense |  |  |  | 25,800 |  |
Deferred tax assets from net operating loss carryforwards |  | $ 30,900 |  | 30,900 | 30,800 |
Future taxable income |  |  |  | $ 219,100 | 198,200 |
Expiration date of NOLs start year |  |  |  | 2019 |  |
Expiration date of NOLs end year |  |  |  | 2038 |  |
Deferred tax assets for income tax credit carryforwards |  | 16,300 |  | $ 16,300 | 17,200 |
Expiration date of tax credit carryforwards start year |  |  |  | 2023 |  |
Expiration date of tax credit carryforwards end year |  |  |  | 2028 |  |
Operating loss carryforwards expiration period description |  |  |  | fiscal 2019 through 2038 |  |
Tax credit carryforwards expiration period description |  |  |  | fiscal 2023 through 2028 |  |
Valuation allowances on deferred tax assets |  | 19,619 |  | $ 19,619 | 13,501 |
Unrecognized tax benefits, if recognized would reduce effective tax rate, amount |  | 13,500 |  | 13,500 | 9,900 |
Accrued for payment of interest and penalties associated with unrecognized tax benefits |  | 700 |  | 700 | $ 1,200 |
Amount of unrecognized tax benefits that could be reduced over next twelve months |  | $ 1,100 |  | $ 1,100 |  |
Scenario, Plan [Member] |  |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |  |
U.S. corporate income tax rate |  |  | 21.00% |  |  |

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