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Derivative Financial Instruments (Effect Of Derivative Instruments On Cash Flow Hedging And Relationship Between Income And Other Comprehensive Income) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Derivatives Designated As Hedging Instruments [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) Recognized in Other Comprehensive Income on Effective-Portion of Derivative, net $ (13,914) $ 20,002 [1]
Gain (Loss) on Effective Portion of Derivative Reclassified from Accumulated Other Comprehensive Income 7,438 10,115 [2]
Ineffective Portion of Gain (Loss) of Derivative and Amount Excluded from Effectiveness Testing Recognized in Income 585 2,034 [1]
Foreign Exchange Contracts [Member] | Derivatives Designated As Hedging Instruments [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) Recognized in Other Comprehensive Income on Effective-Portion of Derivative, net (13,914) 20,002 [1]
Gain (Loss) on Effective Portion of Derivative Reclassified from Accumulated Other Comprehensive Income 7,438  
Ineffective Portion of Gain (Loss) of Derivative and Amount Excluded from Effectiveness Testing Recognized in Income 585  
Foreign Exchange Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Ineffective Portion of Gain (Loss) of Derivative and Amount Excluded from Effectiveness Testing Recognized in Income 461 751 [1]
Other [Member] | Derivatives Designated As Hedging Instruments [Member]
    
Derivative Instruments, Gain (Loss) [Line Items]    
Gain (Loss) on Effective Portion of Derivative Reclassified from Accumulated Other Comprehensive Income 10,115 [2]  
Ineffective Portion of Gain (Loss) of Derivative and Amount Excluded from Effectiveness Testing Recognized in Income   $ 2,034 [1]
[1] Presented as part of financial expenses
[2] Presented as part of revenues/cost of sales