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Asset Retirement Obligations - Rollforward of Asset Retirement Liability (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 28, 2021
Aug. 29, 2020
Aug. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]      
Beginning balance $ 13,920 $ 12,727  
Accretion expense 985 929 $ 865
Effect of exchange rate changes (18) 264  
Ending balance $ 14,887 $ 13,920 $ 12,727