Derivatives, Investments and Fair Value Measurements (Fair Value Inputs) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Feb. 25, 2017	Aug. 27, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 0	$ 77,234
Domestic equity funds	2,799	3,587
International equity funds	193	258
Fixed income funds	226	265
Interest rate swap contract	(709)	0
Fair Value, Net Asset (Liability)	2,509	81,344
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	77,234
Domestic equity funds	2,707	3,515
International equity funds	150	225
Fixed income funds	151	206
Interest rate swap contract	0	0
Fair Value, Net Asset (Liability)	3,008	81,180
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Domestic equity funds	92	72
International equity funds	43	33
Fixed income funds	75	59
Interest rate swap contract	(709)	0
Fair Value, Net Asset (Liability)	(499)	164
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Domestic equity funds	0	0
International equity funds	0	0
Fixed income funds	0	0
Interest rate swap contract	0	0
Fair Value, Net Asset (Liability)	$ 0	$ 0