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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 9 Months Ended
Sep. 30, 2012
Oct. 02, 2011
Sep. 30, 2012
Oct. 02, 2011
Derivative Instruments, Gain (Loss) [Line Items]        
Gain or (Loss) Recognized in OCI-Effective Portion $ (411) [1] $ 190 [1] $ 142 [1] $ 174 [1]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion (108) [1] 260 [1] 329 [1] 491 [1]
Amount of Gain or (Loss) Recognized in Income and Excluded from Effectiveness Testing (26) (94) (134) (222)
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 (411) [1] 190 [1] 142 [1] 174 [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 (26) (94) (134) (222)
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 (253) [1] 280 [1] 431 [1] 511 [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] 0 [1] (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 $ 140 [1] $ (20) [1] $ (100) [1] $ (18) [1]
[1] Refer to Note 10, Stockholders' Equity, which summarizes the cumulative other comprehensive income activity related to derivatives.