Marketable Securities - Available-for-Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	Nov. 22, 2014	Aug. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 87,751	$ 85,138
Available-For-Sale Marketable Securities, Gross Unrealized Gains	185	210
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(126)	(93)
Available-For-Sale Marketable Securities, Fair Value	87,810us-gaap_AvailableForSaleSecurities	85,255us-gaap_AvailableForSaleSecurities
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	39,665	37,265
Available-For-Sale Marketable Securities, Gross Unrealized Gains	99	137
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(46)	(15)
Available-For-Sale Marketable Securities, Fair Value	39,718	37,387
Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	16,816	16,822
Available-For-Sale Marketable Securities, Gross Unrealized Gains	36	16
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(1)
Available-For-Sale Marketable Securities, Fair Value	16,852	16,837
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	10,292	8,791
Available-For-Sale Marketable Securities, Gross Unrealized Gains	27	22
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(80)	(77)
Available-For-Sale Marketable Securities, Fair Value	10,239	8,736
Asset-Backed Securities and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	20,978	22,260
Available-For-Sale Marketable Securities, Gross Unrealized Gains	23	35
Available-For-Sale Marketable Securities, Fair Value	$ 21,001	$ 22,295

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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