Derivatives, Investments and Fair Value Measurements (Fair Value Inputs) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Aug. 26, 2017	Aug. 27, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value		$ 77,234
Domestic equity funds	$ 1,708	3,587
International equity funds	174	258
Fixed income funds	259	265
Interest rate swap contract	(828)
Total assets (liabilities) at fair value	1,313	81,344
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value		77,234
Domestic equity funds	1,671	3,515
International equity funds	157	225
Fixed income funds	170	206
Interest rate swap contract	0
Total assets (liabilities) at fair value	1,998	81,180
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value		0
Domestic equity funds	37	72
International equity funds	17	33
Fixed income funds	89	59
Interest rate swap contract	(828)
Total assets (liabilities) at fair value	(685)	164
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents, at Carrying Value		0
Domestic equity funds	0	0
International equity funds	0	0
Fixed income funds	0	0
Interest rate swap contract	0
Total assets (liabilities) at fair value	$ 0	$ 0