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Derivative Instruments - Information Regarding Effect of Forward Contracts, Net of Underlying Exposure, on Consolidated Statements of Operations (Detail) (Foreign Currency Gain (Loss) [Member], Currency Forward Contracts [Member], USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
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Jun. 30, 2013 | Jul. 01, 2012 | Jun. 30, 2013 | Jul. 01, 2012
Foreign Currency Gain (Loss) [Member] | Currency Forward Contracts [Member] |  |  |  |
Information regarding the effect of the forward contracts, net of the underlying exposure, on the Consolidated Statements of Operations |  |  |  |
Amount of Gain (Loss) Recognized | $ 64 | $ 198 | $ 197 | $ (91)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 + Details
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