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Goodwill And Other Intangible Assets (Schedule Of Gross Carrying Values, Accumulated Amortization, And Approximate Amortization Period Of Definite Lived Intangible Assets) (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Acquired Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value $ 136,061 $ 139,045
Accumulated amortization 14,807 8,686
Customer Lists And Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 31,191 32,419
Accumulated amortization 4,702 3,552
Distribution And Manufacturing Rights And Know-How [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 4,059 4,059
Accumulated amortization 2,035 1,820
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 3,621 3,612
Accumulated amortization 2,918 2,819
Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 2,096 1,439
Accumulated amortization $ 1,467 $ 1,075
Minimum [Member] | Acquired Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 11 years 11 years
Minimum [Member] | Customer Lists And Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 13 years 13 years
Minimum [Member] | Distribution And Manufacturing Rights And Know-How [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 11 years 11 years
Minimum [Member] | Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 3 years  
Maximum [Member] | Acquired Technology [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 22 years 22 years
Maximum [Member] | Customer Lists And Relationships [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 22 years 23 years
Maximum [Member] | Distribution And Manufacturing Rights And Know-How [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 15 years 15 years
Maximum [Member] | Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 17 years 17 years
Maximum [Member] | Other [Member]    
Finite-Lived Intangible Assets [Line Items]    
Amortization Period 5 years 3 years