Quarterly report pursuant to Section 13 or 15(d)

Fair Value Of Measurements (Schedule Of Assets And Liabilities Measured On A Recurring Basis) (Details)

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Fair Value Of Measurements (Schedule Of Assets And Liabilities Measured On A Recurring Basis) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents $ 49,744  
Forward exchange contract, asset, fair value 926 $ 1,281
Assets fair value 50,670 1,281
Level 1 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents 49,744  
Forward exchange contract, asset, fair value
Forward exchange contract, liability, fair value
Assets fair value 49,744
Liabilities fair value
Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Forward exchange contract, asset, fair value 926 1,281
Assets fair value 926 1,281
Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash equivalents  
Forward exchange contract, asset, fair value
Forward exchange contract, liability, fair value
Assets fair value
Liabilities fair value