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SEGMENTS, CUSTOMERS AND GEOGRAPHIC INFORMATION (Schedule Of Major Customer Data As Percentage Of Total Revenues) (Details) - Sales Revenue Goods Net [Member] | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Concentration Risk [Line Items] |  |  |
Percentage of total revenues | 27.30% | 16.60% | 17.70%
Affiliate Companies [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of total revenues | 12.30% |  |

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- Details
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