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Significant Accounting Policies (Schedule Of Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total $ 12,620  
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | Government Bonds [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 12,620  
Significant Observable Inputs (Level 2) [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total 79,652 (2,322)
Significant Observable Inputs (Level 2) [Member] | Corporate Bonds [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 37,491  
Significant Observable Inputs (Level 2) [Member] | Foreign Currency Derivative And Option Contracts [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 24,738 14,755
Liabilities (4,992) (25,954)
Significant Observable Inputs (Level 2) [Member] | Cross Currency Interest Rate Swaps [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets 22,415 8,877
Significant Unobservable Inputs (Level 3) [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total      
Significant Unobservable Inputs (Level 3) [Member] | Government Bonds [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets      
Significant Unobservable Inputs (Level 3) [Member] | Corporate Bonds [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets     
Significant Unobservable Inputs (Level 3) [Member] | Foreign Currency Derivative And Option Contracts [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets      
Liabilities      
Significant Unobservable Inputs (Level 3) [Member] | Cross Currency Interest Rate Swaps [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets