Derivatives, Investments and Fair Value Measurements (Fair Value Inputs) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Aug. 25, 2018	Aug. 26, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Domestic equity funds	$ 1,143	$ 1,708
International equity funds	139	174
Fixed income funds	223	259
Interest rate swap contract, asset	1,959
Interest rate swap contract, liability		(828)
Total assets (liabilities) at fair value	3,464	1,313
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Domestic equity funds	1,114	1,671
International equity funds	120	157
Fixed income funds	132	170
Interest rate swap contract, asset	0
Interest rate swap contract, liability		0
Total assets (liabilities) at fair value	1,366	1,998
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Domestic equity funds	29	37
International equity funds	19	17
Fixed income funds	91	89
Interest rate swap contract, asset	1,959
Interest rate swap contract, liability		(828)
Total assets (liabilities) at fair value	2,098	(685)
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Domestic equity funds	0	0
International equity funds	0	0
Fixed income funds	0	0
Interest rate swap contract, asset	0
Interest rate swap contract, liability		0
Total assets (liabilities) at fair value	$ 0	$ 0