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INTANGIBLE ASSETS, NET (Schedule Of Intangible Assets) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]      
Original amount $ 17,370 $ 17,370  
Accumulated amortization 15,826 14,178  
Intangible assets, net 1,544 3,192  
Amortization expense 1,648 1,865 $ 2,121
Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original amount 8,600 8,600  
Accumulated amortization 7,314 6,082  
Trademarks [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original amount 800 800  
Accumulated amortization $ 800 800  
Useful lives 2 years    
Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Original amount $ 7,970 7,970  
Accumulated amortization $ 7,712 $ 7,296