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				9 Months Ended
	Sep. 28, 2014		Sep. 29, 2013		Sep. 28, 2014		Sep. 29, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in OCI-Effective Portion	$ 401	[1]	$ (173)		$ (170)	[1]	$ 319
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	262	[1]	42	[1]	(236)	[1]	465	[1]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing	(41)		(35)		(107)		(83)
Other Income, Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing	(41)		(35)		(107)		(83)
Net Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	320	[1]	2	[1]	(221)	[1]	522	[1]
Cost Of Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	0	[1]	(2)	[1]	8	[1]	(5)	[1]
Operating Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion	$ (58)	[1]	$ 42	[1]	$ (23)	[1]	$ (52)	[1]

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