Marketable Securities - Available-for-Sale Marketable Securities (Detail) (USD $) In Thousands, unless otherwise specified	May 09, 2015	Aug. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 88,226	$ 85,138
Available-For-Sale Marketable Securities, Gross Unrealized Gains	267	210
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(86)	(93)
Available-For-Sale Marketable Securities, Fair Value	88,407us-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	35,226	37,265
Available-For-Sale Marketable Securities, Gross Unrealized Gains	159	137
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(4)	(15)
Available-For-Sale Marketable Securities, Fair Value	35,381	37,387
Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	27,254	16,822
Available-For-Sale Marketable Securities, Gross Unrealized Gains	61	16
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(1)
Available-For-Sale Marketable Securities, Fair Value	27,315	16,837
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	10,103	8,791
Available-For-Sale Marketable Securities, Gross Unrealized Gains	26	22
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(82)	(77)
Available-For-Sale Marketable Securities, Fair Value	10,047	8,736
Asset-Backed Securities and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	15,643	22,260
Available-For-Sale Marketable Securities, Gross Unrealized Gains	21	35
Available-For-Sale Marketable Securities, Fair Value	$ 15,664	$ 22,295

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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

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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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