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Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2011
Derivative Financial Instruments [Abstract]  
Schedule Of Derivative Instruments In Statement Of Financial Position, Fair Value
Effect Of Derivative Instruments On Cash Flow Hedging And Relationship Between Income And Other Comprehensive Income
Notional Amounts Of Outstanding Foreign Exchange Forward Contracts
   
Forward contracts
 
   
Buy
   
Sell
 
   
December 31,
   
December 31,
 
   
2011
   
2010
   
2011
   
2010
 
Euro
  $ 57,022     $ 16,076     $ 154,251     $ 240,830  
GBP
    30,868       20,475       45,095       85,980  
NIS
    654,105       114,284       -       -  
Other
    14,073       30,412       34,120       54,572  
    $ 756,068     $ 181,247     $ 233,466     $ 381,382