Investments and Fair Value Measurements (Fair Value Inputs) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Aug. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Domestic equity funds	$ 5,117	$ 5,465
International equity funds	514	716
Fixed income funds	247	242
Total assets at fair value	5,878	6,423
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Domestic equity funds	5,117	5,465
International equity funds	514	716
Fixed income funds	247	242
Total assets at fair value	5,878	6,423
Fair Value, Inputs, Level 2 [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
Total assets at fair value	0	0
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
Total assets at fair value	$ 0	$ 0