Foreign Currency Derivatives - Net Gain (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2013	Sep. 30, 2012	Sep. 29, 2013	Sep. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Net unrealized gain on derivatives, beg	$ 1,238	$ 2,346	$ (243)	$ 10,473
Net unrealized gain (loss) on derivatives	(2,005)	(2,611)	(524)	(10,738)
Net unrealized gain on derivatives, end	(767)	(265)	(767)	(265)
Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) recognized in OCI (effective portion)	1,454	253	550	1,386
Sales [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Less: Loss (gain) reclassified from OCI to revenue (effective portion)	551	2,358	(1,074)	9,352
Other, Net [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Loss recognized in Other, net on derivatives (ineffective portion and amount excluded from effectiveness testing) (1)	(1,620)	(749)	(2,123)	(1,176)
Not Designated as Hedging Instrument [Member] | Other, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in Other, net	$ (1,950)	$ 520	$ (5,103)	$ 6,824