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Derivative Instruments - Information Regarding Effect of Forward Contracts, Net of Underlying Exposure, On Consolidated Statements of Operations (Detail) (Currency Forward Contracts [Member], Foreign Currency Gain (Loss) [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Oct. 02, 2011	Sep. 30, 2012	Oct. 02, 2011
Currency Forward Contracts [Member] \| Foreign Currency Gain (Loss) [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Loss Recognized in Income on Derivatives	$ (546)	$ (171)	$ (637)	$ (43)

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

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