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Asset Retirement Obligations - Reconciliation of Asset Retirement Liability (Details) - USD ($)
$ in Thousands
9 Months Ended
May 30, 2020
May 25, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]    
Beginning balance $ 12,727  
Accretion expense 694 $ 647
Effect of exchange rate changes 34  
Balance $ 13,455