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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets, Net Of Amortization) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 17,039 $ 16,980
Less accumulated amortization (7,500) (7,211)
Intangible assets, net 9,539 9,769
Customer Lists And Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross 13,975 13,942
Product Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross 2,117 2,091
Core Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 947 $ 947