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Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Intangible assets, Accumulated amortization $ (184,751)   $ (184,751)   $ (167,616)
Intangible assets, Gross carrying amount 599,942   599,942   582,556
Amortization expense 6,000 $ 5,300 17,200 $ 15,600  
Future amortization expense [Abstract]          
Remaining, 2018 5,993   5,993    
2019 23,622   23,622    
2020 23,639   23,639    
2021 22,686   22,686    
2022 21,227   21,227    
2023 20,615   20,615    
Expense          
Future amortization expense [Abstract]          
Remaining, 2018 4,493   4,493    
2019 17,622   17,622    
2020 17,639   17,639    
2021 16,686   16,686    
2022 15,227   15,227    
2023 14,615   14,615    
Reduction of Revenue          
Future amortization expense [Abstract]          
Remaining, 2018 1,500   1,500    
2019 6,000   6,000    
2020 6,000   6,000    
2021 6,000   6,000    
2022 6,000   6,000    
2023 6,000   6,000    
Trademarks and Tradenames          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Unamortized intangible assets, Gross carrying amount 86,544   86,544   86,544
Customer and Distributor Relationships [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Amortized intangible assets, Gross carrying amount 214,598   214,598   214,685
Intangible assets, Accumulated amortization (94,371)   (94,371)   (86,137)
Sales representation, marketing and promotional rights [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Amortized intangible assets, Gross carrying amount 149,376   149,376   149,376
Intangible assets, Accumulated amortization (40,500)   (40,500)   (36,000)
Patents and Other Intangible Assets [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Amortized intangible assets, Gross carrying amount 61,292   61,292   69,668
Intangible assets, Accumulated amortization (43,700)   (43,700)   (42,127)
In Process Research and Development [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Impairment of Intangible Assets, Finite-lived 9,500        
Technology-Based Intangible Assets [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Amortized intangible assets, Gross carrying amount 88,132   88,132   62,283
Intangible assets, Accumulated amortization $ (6,180)   (6,180)   $ (3,352)
Finite-lived intangible assets acquired     $ 25,800    
Weighted average amortization period (in years)     14 years    
Weighted Average          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Finite-lived intangible asset useful life (in years)     24 years    
Weighted Average | Customer and Distributor Relationships [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Finite-lived intangible asset useful life (in years)     29 years    
Weighted Average | Sales representation, marketing and promotional rights [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Finite-lived intangible asset useful life (in years)     25 years    
Weighted Average | Patents and Other Intangible Assets [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Finite-lived intangible asset useful life (in years)     15 years    
Weighted Average | Technology-Based Intangible Assets [Member]          
Schedule of Finite-Lived and Indefinite-Lived Assets [Line Items]          
Finite-lived intangible asset useful life (in years)     16 years