Fair Value Of Measurements (Schedule Of Assets And Liabilities Measured On A Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Forward exchange contract, asset, fair value	$ 614	$ 46
Forward exchange contract, liability, fair value		993
Assets fair value	614	46
Liabilities fair value		993
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Forward exchange contract, asset, fair value
Forward exchange contract, liability, fair value
Assets fair value
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	614	46
Forward exchange contract, liability, fair value		993
Assets fair value	614	46
Liabilities fair value		993
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Forward exchange contract, asset, fair value
Forward exchange contract, liability, fair value
Assets fair value
Liabilities fair value