Investments and Fair Value Measurements (Fair Value Level 3 Rollforward) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 01, 2014	Mar. 02, 2013	Mar. 01, 2014	Mar. 02, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at beginning of period	$ 0	$ 8,823	$ 2,108	$ 9,074
Transfer to Level 2	0	0	0	(250)
Net change included in other comprehensive income	0	(88)	242	(89)
Sales	0	0	(2,350)	0
Balance at end of period	0	8,735	0	8,735
Proceeds from the sale of investments, at par			$ 2,350	$ 250