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Asset Retirement Obligations - Reconciliation of Asset Retirement Liability (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 27, 2021
Nov. 28, 2020
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Beginning balance $ 14,887  
Accretion expense 246 $ 245
Effect of exchange rate changes (144)  
Ending balance $ 14,989