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Acquisitions - (Additional Information) (Detail) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Dec. 07, 2018
Dec. 31, 2019
Dec. 30, 2018
Dec. 31, 2019
Dec. 30, 2018
Mar. 31, 2019
Business Acquisition [Line Items]              
Goodwill     $ 679,051   $ 679,051   $ 656,399
Closing day spot rate (USD per share)   $ 79.20          
Unrecognized tax benefits     6,607   6,607   $ 7,840
Amortization of intangible assets     9,843 $ 3,105 24,468 $ 7,220  
Amortization of intangible assets, remainder of 2020     10,055   10,055    
Amortization of intangible assets, 2021     39,336   39,336    
Amortization of intangible assets, 2022     39,092   39,092    
Amortization of intangible assets, 2023     35,434   35,434    
Amortization of intangible assets, 2024     29,668   29,668    
Alpha              
Business Acquisition [Line Items]              
Initial purchase consideration   $ 750,000          
Consideration transferred   742,502          
Goodwill   319,228          
Estimated tax-deductible goodwill     $ 41,852   41,852    
Payments to acquire businesses   650,000          
Shares issued in acquisition, value   93,268          
Working capital adjustment   $ 766          
Shares issued in acquisition (USD per share)   $ 84.92          
Debt assumed   $ 145,304          
Alpha | Customer relationships              
Business Acquisition [Line Items]              
Acquired intangible assets         221,000    
N Holding AB [Member]              
Business Acquisition [Line Items]              
Goodwill $ 23,242            
Payments to acquire businesses 77,777            
Debt assumed 107,018            
N Holding AB [Member] | Developed Technology Rights              
Business Acquisition [Line Items]              
Acquired intangible assets $ 13,689            
Useful life of intangible assets 10 years            
N Holding AB [Member] | Trademarks              
Business Acquisition [Line Items]              
Acquired intangible assets $ 13,937            
Useful life of intangible assets 3 years            
N Holding AB [Member] | Customer relationships              
Business Acquisition [Line Items]              
Acquired intangible assets $ 55,003            
Useful life of intangible assets 14 years            
Trademarks | Alpha              
Business Acquisition [Line Items]              
Acquired indefinite-lived intangible assets         $ 56,000    
Common Stock | Alpha              
Business Acquisition [Line Items]              
Shares issued in acquisition (in shares)   1,177,630