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Acquisitions and Dispositions - Allocation of Acquired Intangible Assets and Liabilities Related Estimates of Useful Lives (Detail) - Electro Scientific Industries Inc [Member] - USD ($)
$ in Thousands
 12 Months Ended
Feb. 01, 2019
Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquired intangible assets, purchase price $ 316,200  
Completed Technology [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquired intangible assets, purchase price   $ 274,000
Completed Technology [Member] | Lasers Products [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquired intangible assets, purchase price $ 255,700  
Estimated useful life of finite-lived intangible assets 12 years  
Completed Technology [Member] | Non Laser Products [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquired intangible assets, purchase price $ 18,300  
Estimated useful life of finite-lived intangible assets 10 years  
Trademarks and Trade Names [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquired intangible assets, purchase price $ 14,400  
Estimated useful life of finite-lived intangible assets 7 years  
Customer Relationships [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquired intangible assets, purchase price $ 25,400 $ 25,400
Estimated useful life of finite-lived intangible assets 10 years  
Backlog [Member]    
Acquired Finite-Lived Intangible Assets [Line Items]    
Acquired intangible assets, purchase price $ 2,400  
Estimated useful life of finite-lived intangible assets 1 year