| Goodwill And Other Intangible Assets (Schedule Of Indefinite Lived Intangible Assets) (Details) $ in Thousands | 6 Months Ended | 
|---|---|
| Jun. 30, 2018  USD ($) | |
| Acquisition [Abstract] | |
| Balance at December 31, 2017 | $ 41,843 | 
| Impact of foreign currency exchange rates | (92) | 
| Balance at June 30, 2018 | $ 41,751 | 
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- References No definition available. 
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- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. No definition available. 
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