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		3 Months Ended		6 Months Ended
		Jun. 28, 2015	Jun. 29, 2014	Jun. 28, 2015	Jun. 29, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI-Effective Portion	[1]	$ (688)	$ (7)	$ (883)	$ (571)
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	[1]	(600)	(139)	(771)	(498)
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing		(15)	(39)	(34)	(66)
Other Income (expense), Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing		(15)	(39)	(34)	(66)
Net Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	[1]	(775)	(116)	(922)	(541)
Cost Of Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	[1]	5	6	4	8
Operating Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	[1]	$ 170	$ (29)	$ 147	$ 35

[1] Refer to Note 8, Stockholders' Equity, which summarizes the accumulated other comprehensive income activity related to derivatives.