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, 2018
Dec. 31, 2017
Dec. 31, 2016
Finite-Lived Intangible Assets [Line Items]      
Goodwill $ 86,646,000 $ 85,959,000  
Total goodwill and other identifiable intangible assets, net $ 306,439,000 314,543,000  
Finite-lived intangible asset, useful life 20 years    
Amortization expense $ 15,800,000 11,300,000 $ 10,600,000
Amortization expense, 2019 13,600,000    
Amortization expense, 2020 12,800,000    
Amortization expense, 2021 12,800,000    
Amortization expense, 2022 12,800,000    
Amortization expense, 2023 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 235,413,000 222,900,000  
Less: Accumulated amortization (35,070,000) (23,301,000)  
Trade name      
Finite-Lived Intangible Assets [Line Items]      
Definite lived intangible assets 2,642,000 2,642,000  
Less: Accumulated amortization (1,048,000) (916,000)  
Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Definite lived intangible assets 29,600,000 29,600,000  
Less: Accumulated amortization $ (11,744,000) (10,264,000)  
IPR&D      
Finite-Lived Intangible Assets [Line Items]      
IPR&D   $ 7,923,000