Marketable Securities - Available-for-Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	Aug. 30, 2014	Aug. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 85,138	$ 82,198
Available-For-Sale Marketable Securities, Gross Unrealized Gains	210	240
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(93)	(277)
Available-For-Sale Marketable Securities, Fair Value	85,255	82,161
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	37,265	27,803
Available-For-Sale Marketable Securities, Gross Unrealized Gains	137	148
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(15)	(67)
Available-For-Sale Marketable Securities, Fair Value	37,387	27,884
Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	16,822	21,372
Available-For-Sale Marketable Securities, Gross Unrealized Gains	16	18
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(1)	(67)
Available-For-Sale Marketable Securities, Fair Value	16,837	21,323
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	8,791	7,198
Available-For-Sale Marketable Securities, Gross Unrealized Gains	22	24
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(77)	(138)
Available-For-Sale Marketable Securities, Fair Value	8,736	7,084
Asset-Backed Securities and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	22,260	25,825
Available-For-Sale Marketable Securities, Gross Unrealized Gains	35	50
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(5)
Available-For-Sale Marketable Securities, Fair Value	$ 22,295	$ 25,870