Derivative Instruments - Effect on Income Statement (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Foreign currency (loss) gain, inclusive of the impact of derivatives	$ (599)	$ (2,182)
Foreign Exchange Contract [Member] | Other Comprehensive Income (Loss) [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in OCI (effective portion)	(1,799)	(1,215)
Foreign Exchange Contract [Member] | Cost of Sales [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from accumulated OCI into cost of sales (effective portion)	(297)	(270)
Foreign Exchange Contract [Member] | Other Income Expense Net [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other, net	767	826
Foreign Exchange Contract [Member] | Other Income Expense Net [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other, net (ineffective portion and amount excluded from effectiveness testing)	$ (25)	$ 34