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Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) - USD ($)
$ in Thousands
12 Months Ended
Aug. 25, 2018
Aug. 26, 2017
Income Tax Disclosure [Abstract]    
Beginning balance $ 22,201 $ 27,726
Additions based on tax positions related to the current year 8,184 7,089
Additions for tax positions of prior years 1,404 278
Reductions for tax positions of prior years (482) (6,954)
Reductions due to settlements (1,930) (1,964)
Reductions due to statute of limitations (3,300) (3,974)
Ending balance $ 26,077 $ 22,201