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4. Goodwill and other Purchased Intangible Assets Intangible Assets, Goodwill and Other Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Gross $ 553,500 $ 576,700  
Future Amortization Expense, Year One 23,500    
Future Amortization Expense, Year Two 20,700    
Future Amortization Expense, Year Three 18,800    
Future Amortization Expense, Year Four 13,800    
Future Amortization Expense, Year Five 11,500    
Finite-Lived Intangible Assets, Amortization Expense, after Year Five 52,800    
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (412,400) (409,100)  
Net Carrying Amount 141,100 167,600  
Amortization [Abstract]      
Amortization expense 24,900 28,400 $ 27,500
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) 0 0  
Intangible Assets, Net (Excluding Goodwill) 332,147 253,939  
Intangible Assets, Gross (Excluding Goodwill) $ 744,500 $ 663,000  
Customer Relationships [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 5 years 7 days 5 years 3 months 7 days  
Finite-Lived Intangible Assets, Gross $ 104,700 $ 111,800  
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (89,900) (90,700)  
Net Carrying Amount $ 14,800 $ 21,100  
Know how [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 2 years 9 months 3 years 9 months  
Finite-Lived Intangible Assets, Gross $ 166,200 $ 171,600  
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (153,900) (154,900)  
Net Carrying Amount $ 12,300 $ 16,700  
Developed Technology Rights [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 12 years 9 months 29 days 13 years 5 months 1 day  
Finite-Lived Intangible Assets, Gross $ 211,100 $ 215,600  
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (121,600) (115,600)  
Net Carrying Amount $ 89,500 $ 100,000  
Licensing Agreements [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 5 years 10 months 2 days 6 years 9 months 14 days  
Finite-Lived Intangible Assets, Gross $ 59,000 $ 64,900  
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (38,500) (40,600)  
Net Carrying Amount $ 20,500 $ 24,300  
Trade Names [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 6 years 6 months 21 days 7 years 3 months 29 days  
Finite-Lived Intangible Assets, Gross $ 6,100 $ 6,300  
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (4,500) (4,400)  
Net Carrying Amount $ 1,600 $ 1,900  
Noncompete Agreements [Member]      
Acquired Finite-Lived Intangible Assets [Line Items]      
Finite-Lived Intangible Assets, Remaining Amortization Period 3 years 1 month 17 days 3 years 9 months 10 days  
Finite-Lived Intangible Assets, Gross $ 6,400 $ 6,500  
Finite-Lived Intangible Assets, Net [Abstract]      
Accumulated Amortization (4,000) (2,900)  
Net Carrying Amount 2,400 3,600  
In Process Research and Development [Member]      
Amortization [Abstract]      
Indefinite-lived Intangible Assets (Excluding Goodwill) $ 191,000 $ 86,300