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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets, Net Of Amortization) (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 32,981 $ 33,010
Less accumulated amortization (15,358) (13,594)
Intangible assets, net 17,623 19,416
Customer Lists And Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross 26,030 26,047
Product Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross 4,741 4,753
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