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Derivatives, Investments and Fair Value Measurements Derivatives, Investments and Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	6 Months Ended
	Feb. 23, 2019	Aug. 25, 2018	Nov. 08, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, gross	$ 283,330	$ 298,532
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]
Long-term debt, gross	$ 260,000	$ 260,000	$ 300,000
Interest rate, stated percentage	5.32%	5.32%
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