Derivative Financial Instruments (Schedule Of Company's Derivative Instruments On Other Comprehensive Income And The Consolidated Statement Of Operations) (Details) (b) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Apr. 01, 2012		Apr. 03, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI-Effective Portion	$ (106)	[1]	$ (218)	[1]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	(50)	[1]	123	[1]
Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing	(45)		(38)
Derivatives Designated As Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI-Effective Portion	(106)	[1]	(218)	[1]
Derivatives Designated As Hedging Instruments [Member] | Other Income (Expense), Net [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing	(45)		(38)
Derivatives Designated As Hedging Instruments [Member] | Net Revenue [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	2	[1]	62	[1]
Derivatives Designated As Hedging Instruments [Member] | Cost Of Revenue [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	(2)	[1]	2	[1]
Derivatives Designated As Hedging Instruments [Member] | Operating Expenses [Member] | Foreign Currency Forward Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	$ (50)	[1]	$ 59	[1]

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