Annual report pursuant to Section 13 and 15(d)

Balance Sheet Details - Intangible Assets (Detail)

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Balance Sheet Details - Intangible Assets (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]      
Weighted average amortization period in years 6 years 1 month 6 days    
Intangibles assets, Gross $ 379,631 $ 103,711  
Less accumulated amortization (68,986) (21,850)  
Intangible assets, net 310,645 81,861 $ 48,155
Intangible Assets, Net (Excluding Goodwill) 315,045 104,261  
Amortization of Intangible Assets $ 54,694 16,084 $ 29,931
Licensed Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average amortization period in years 3 years 8 months 12 days    
Intangibles assets, Gross $ 2,070 3,311  
Less accumulated amortization (575) (2,957)  
Intangible assets, net $ 1,495 354  
Developed Technology Rights [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average amortization period in years 6 years 10 months 24 days    
Intangibles assets, Gross $ 241,561 77,800  
Less accumulated amortization (39,252) (13,550)  
Intangible assets, net $ 202,309 64,250  
Trademarks and Trade Names [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average amortization period in years 6 years 1 month 6 days    
Intangibles assets, Gross $ 13,800 1,700  
Less accumulated amortization (1,992) (405)  
Intangible assets, net $ 11,808 1,295  
Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Weighted average amortization period in years 4 years 7 months 6 days    
Intangibles assets, Gross $ 121,100 20,000  
Less accumulated amortization (26,661) (4,782)  
Intangible assets, net $ 94,439 $ 15,218