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Goodwill And Other Intangible Assets (Schedule Of Intangible Assets, Net Of Amortization) (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 89,848 $ 40,840
Less accumulated amortization (27,176) (21,424)
Intangible assets, net $ 62,672 $ 19,416
Weighted average useful life 12 years 2 months 12 days 13 years 6 months
Customer Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 66,705 $ 31,930
Less accumulated amortization (21,036) (16,783)
Intangible assets, net $ 45,669 $ 15,147
Weighted average useful life 12 years 9 months 18 days 14 years 2 months 12 days
Product Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 20,933 $ 6,700
Less accumulated amortization (4,540) (3,151)
Intangible assets, net $ 16,393 $ 3,549
Weighted average useful life 10 years 4 months 24 days 11 years 6 months
Tradename/Trademarks [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 1,263 $ 1,263
Less accumulated amortization (653) (543)
Intangible assets, net $ 610 $ 720
Weighted average useful life 9 years 4 months 24 days 9 years 4 months 24 days
Core Technologies [Member]    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, gross $ 947 $ 947
Less accumulated amortization $ (947) $ (947)
Weighted average useful life 10 years 10 years