Derivative Financial Instruments (Schedule Of Company's Derivative Instruments On Other Comprehensive Income And The Consolidated Statement Of Operations) (Details) (Derivatives Designated As Hedging Instruments [Member], Foreign Currency Forward Contracts [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jul. 01, 2012		Jun. 30, 2013		Jul. 01, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI-Effective Portion	$ 314	[1]	$ 659	[1]	$ 492	[1]	$ 553	[1]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	396	[1]	487	[1]	423	[1]	437	[1]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing	(26)		(63)		(48)		(108)
Other Income (Expense), Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing	(26)		(63)		(48)		(108)
Net Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	445	[1]	682	[1]	520	[1]	684	[1]
Cost Of Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	(1)	[1]	(5)	[1]	(3)	[1]	(7)	[1]
Operating Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	$ (48)	[1]	$ (190)	[1]	$ (94)	[1]	$ (240)	[1]

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