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Derivatives, Investments and Fair Value Measurements (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Aug. 31, 2019
Aug. 25, 2018
Nov. 08, 2016
Fair Value, Measurements, Nonrecurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Asset Impairment Charges $ 0    
Term Loan      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt Instrument, Face Amount     $ 300,000
Term Loan | Interest Rate Swap [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Notional amount $ 120,000 $ 170,000  
Interest rate, stated percentage 5.32% 5.32%