Marketable Securities - Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	May 07, 2016	Aug. 29, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 97,844	$ 88,467
Available-For-Sale Marketable Securities, Gross Unrealized Gains	360	108
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(22)	(148)
Available-For-Sale Marketable Securities, Fair Value	98,182	88,427
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	37,697	34,859
Available-For-Sale Marketable Securities, Gross Unrealized Gains	240	51
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(1)	(40)
Available-For-Sale Marketable Securities, Fair Value	37,936	34,870
Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	32,602	33,098
Available-For-Sale Marketable Securities, Gross Unrealized Gains	63	31
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(2)	(7)
Available-For-Sale Marketable Securities, Fair Value	32,663	33,122
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	7,617	9,287
Available-For-Sale Marketable Securities, Gross Unrealized Gains	27	17
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(17)	(99)
Available-For-Sale Marketable Securities, Fair Value	7,627	9,205
Asset-Backed Securities and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	19,928	11,223
Available-For-Sale Marketable Securities, Gross Unrealized Gains	30	9
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(2)	(2)
Available-For-Sale Marketable Securities, Fair Value	$ 19,956	$ 11,230

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
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27232-111563

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Paragraph 2
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
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