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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets, Net Of Amortization) (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 32,923 $ 32,917
Less accumulated amortization (18,644) (17,101)
Intangible assets, net 14,279 15,816
Customer Lists And Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross 25,998 25,995
Product Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross 4,715 4,712
Trade Names and Trademarks [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross 1,263 1,263
Core Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 947 $ 947