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Fair Value Measurements - Additional Information (Detail) (USD $) | 9 Months Ended | 0 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 27, 2014 | Sep. 28, 2013 | Oct. 01, 2011 Auction Rate Security [Member] | Sep. 27, 2014 Auction Rate Security [Member]
Schedule Of Fair Value Measurements [Line Items] |  |  |  |
Impairment loss on investment included in other comprehensive income (loss) | $ 412,000 | $ 0 | $ (412,000) |
Impairment loss on investment included in earnings | $ 600,000 | $ 0 |  | $ (600,000)

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- Definition Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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