Marketable Securities - Additional Information (Detail) (USD $)	0 Months Ended
May 09, 2015	May 09, 2015 Securities	Aug. 30, 2014
Investments, Debt and Equity Securities [Abstract]
Available for sale securities debt maturity period range	Less than one year to approximately three years
Number of securities available for sale loss position		19
Available-For-Sale Marketable Securities, Gross Unrealized Losses		$ 86,000	$ 93,000
Marketable securities transferred	$ 45,500,000

The time period allotted for available-for-sale securities to mature.

No definition available.

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- Definition

Amount transferred by the Company's insurance captive to a Trust Account for future obligations.

+ References

No definition available.

+ Details

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- Definition

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

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

+ Details

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- Definition

Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563

+ Details

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- Details

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