Derivative Financial Instruments (Schedule Of Company's Derivative Instruments On Other Comprehensive Income And The Consolidated Statement Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jul. 01, 2012		Jul. 03, 2011		Jul. 01, 2012		Jul. 03, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI-Effective Portion	$ 659	[1]	$ 202	[1]	$ 553	[1]	$ (16)	[1]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	487	[1]	108	[1]	437	[1]	231	[1]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing	(63)		(90)		(108)		(128)
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	659	[1]	202	[1]	553	[1]	(16)	[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	(63)		(90)		(108)		(128)
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	682	[1]	169	[1]	684	[1]	231	[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	(5)	[1]	(4)	[1]	(7)	[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	$ (190)	[1]	$ (57)	[1]	$ (240)	[1]	$ 2	[1]

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