Marketable Securities - Available-for-Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Feb. 13, 2016	Aug. 29, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	$ 93,686	$ 88,467
Available-For-Sale Marketable Securities, Gross Unrealized Gains	209	108
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(117)	(148)
Available-For-Sale Marketable Securities, Fair Value	93,778	88,427
Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	45,765	34,859
Available-For-Sale Marketable Securities, Gross Unrealized Gains	78	51
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(90)	(40)
Available-For-Sale Marketable Securities, Fair Value	45,753	34,870
Government Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	26,371	33,098
Available-For-Sale Marketable Securities, Gross Unrealized Gains	80	31
Available-For-Sale Marketable Securities, Gross Unrealized Losses		(7)
Available-For-Sale Marketable Securities, Fair Value	26,451	33,122
Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	8,115	9,287
Available-For-Sale Marketable Securities, Gross Unrealized Gains	29	17
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(24)	(99)
Available-For-Sale Marketable Securities, Fair Value	8,120	9,205
Asset-Backed Securities and Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-For-Sale Marketable Securities, Amortized Cost Basis	13,435	11,223
Available-For-Sale Marketable Securities, Gross Unrealized Gains	22	9
Available-For-Sale Marketable Securities, Gross Unrealized Losses	(3)	(2)
Available-For-Sale Marketable Securities, Fair Value	$ 13,454	$ 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=51813488&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=27724398&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=49167202&loc=d3e26610-111562

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+ 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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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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-Section 50
-Paragraph 2
-Subparagraph (c)
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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
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