Annual report pursuant to Section 13 and 15(d)

Balance Sheet Account Details - Goodwill and Other Intangible Assets (Details)

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Balance Sheet Account Details - Goodwill and Other Intangible Assets (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]      
Goodwill $ 85,959,000 $ 72,207,000  
Total goodwill and other identifiable intangible assets, net $ 314,543,000 276,912,000  
Finite-lived intangible asset, useful life 20 years    
Amortization expense $ 11,300,000 10,600,000 $ 2,400,000
Amortization expense, 2018 12,800,000    
Amortization expense, 2019 12,800,000    
Amortization expense, 2020 12,800,000    
Amortization expense, 2021 12,800,000    
Impairment of intangible assets with finite lives 0 0 $ 0
Complete technology      
Finite-Lived Intangible Assets [Line Items]      
Definite lived intangible assets 222,900,000 182,577,000  
Less: Accumulated amortization (23,301,000) (12,792,000)  
Trade name      
Finite-Lived Intangible Assets [Line Items]      
Definite lived intangible assets 2,642,000 2,642,000  
Less: Accumulated amortization (916,000) (784,000)  
Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Definite lived intangible assets 29,600,000 29,600,000  
Less: Accumulated amortization (10,264,000) (8,784,000)  
Licensing Agreements      
Finite-Lived Intangible Assets [Line Items]      
Definite lived intangible assets 26,298,000 26,298,000  
Less: Accumulated amortization (6,772,000) (477,000)  
IPR&D      
Finite-Lived Intangible Assets [Line Items]      
IPR&D $ 7,923,000 $ 12,246,000