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Derivative Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2012
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,
    2012   2011   2012   2011
Euro $ 60,665 $ 57,022 $ 131,696 $ 154,251
GBP   45,262   30,868   28,268   45,095
NIS   386,017   654,105   -   -
Other   4,344   14,073   14,871   34,120
  $ 496,288 $ 756,068 $ 174,835 $ 233,466