Derivative Financial Instruments (Schedule Of Company's Derivative Instruments On Other Comprehensive Income And The Consolidated Statement Of Operations) (Details) (Derivatives Designated as Hedging Instrument [Member], Foreign Currency Forward Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Apr. 01, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ 178		$ (106)
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	27	[1]	(50)	[1]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	(22)		(45)
Net Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	75	[1]	2	[1]
Cost Of Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(2)	[1]	(2)	[1]
Operating Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(46)	[1]	(50)	[1]
Other Income Expense Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	$ (22)		$ (45)

[1] Refer to Note 10, Stockholders' Equity, which summarizes the cumulative other comprehensive income activity related to derivatives.