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Derivative Instruments (Financial Information Related To Cash Flow Hedges Of Future Revenues) (Detail) (Cash Flow Hedging [Member]) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012 USD ($)	Oct. 01, 2011 USD ($)	Sep. 29, 2012 USD ($)	Oct. 01, 2011 USD ($)	Sep. 29, 2012 EUR (€)	Dec. 31, 2011 EUR (€)
Derivative [Line Items]
Notional balance of outstanding contracts versus the dollar					€ 91,560	€ 92,305
Hedge effectiveness					100.00%	100.00%
Net gains and (losses) included in revenue	$ 1,967	$ (1,487)	$ 4,616	$ (4,272)

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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