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Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Intangible assets    
Weighted Average Remaining Amortization Period 9 years 2 months 12 days  
Gross Carrying Amount $ 550,119 $ 204,599
Accumulated Amortization and Impairment 180,276 146,221
Total Net Intangible Assets $ 369,843 58,378
Indefinite-lived trademark    
Intangible assets    
Gross Carrying Amount   2,900
Total Net Intangible Assets   2,900
Technology    
Intangible assets    
Weighted Average Remaining Amortization Period 8 years  
Gross Carrying Amount $ 307,588 149,198
Accumulated Amortization and Impairment 133,121 113,904
Total Net Intangible Assets $ 174,467 35,294
Customer relationships    
Intangible assets    
Weighted Average Remaining Amortization Period 11 years 4 months 24 days  
Gross Carrying Amount $ 164,595 47,885
Accumulated Amortization and Impairment 39,336 28,659
Total Net Intangible Assets 125,259 19,226
In-process R&D    
Intangible assets    
Gross Carrying Amount 43,340  
Total Net Intangible Assets $ 43,340  
Trademark and tradenames    
Intangible assets    
Weighted Average Remaining Amortization Period 6 years 4 months 24 days  
Gross Carrying Amount $ 30,910 2,590
Accumulated Amortization and Impairment 4,321 1,948
Total Net Intangible Assets $ 26,589 642
Other    
Intangible assets    
Weighted Average Remaining Amortization Period 2 years  
Gross Carrying Amount $ 3,686 2,026
Accumulated Amortization and Impairment 3,498 1,710
Total Net Intangible Assets $ 188 $ 316