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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 22, 2017
Feb. 24, 2018
Aug. 31, 2019
Aug. 25, 2018
Aug. 26, 2017
Percentage of domestic federal statutory tax rate     21.00% 25.90% 35.00%
Provisional net benefit   $ (20,100)   $ 20,100  
Effective income tax rate     24.70% 12.50% 39.00%
Unrecognized tax benefits     $ 7,668 $ 2,198 $ 4,214
Total unrecognized tax benefits     7,000 1,900  
Accrued interest and penalties     $ 200 $ 100  
Maximum          
Percentage of domestic federal statutory tax rate 35.00%        
Minimum          
Percentage of domestic federal statutory tax rate 21.00%