| Goodwill And Other Intangible Assets (Schedule Of Definite Lived Intangible Assets, Net) (Details) $ in Thousands | 3 Months Ended | 
|---|---|
| Mar. 31, 2018  USD ($) | |
| Acquisition [Abstract] | |
| Gross balance at December 31, 2017 | $ 33,062 | 
| Impact of foreign currency exchange rates | 137 | 
| Gross balance at March 31, 2018 | $ 33,199 | 
| X | ||||||||||
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- References No definition available. 
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| X | ||||||||||
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available. 
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| X | ||||||||||
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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