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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets, Net Of Amortization) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 16,980 $ 17,130
Less accumulated amortization (7,211) (6,196)
Intangible assets, net $ 9,769 $ 10,934
Weighted average useful life 14 years 10 months 24 days 14 years 10 months 24 days
Customer Lists And Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 13,942 $ 14,026
Less accumulated amortization (5,843) (5,034)
Intangible assets, net $ 8,099 $ 8,992
Weighted average useful life 15 years 3 months 18 days 15 years 3 months 18 days
Product Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 2,091 $ 2,157
Less accumulated amortization (745) (633)
Intangible assets, net $ 1,346 $ 1,524
Weighted average useful life 14 years 14 years
Core Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 947 $ 947
Less accumulated amortization (623) (529)
Intangible assets, net $ 324 $ 418
Weighted average useful life 10 years 10 years