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Acquisitions - Additional Information (Detail) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jan. 15, 2020
Jul. 31, 2018
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Business Acquisition [Line Items]          
Intangible assets acquired   $ 30,000      
Allocated fair value to purchased intangible asset   $ 33,000      
Purchased intangible asset useful life   12 years      
Intangible assets acquired     7 years 7 years  
Business acquisition, goodwill, not deductible for tax purposes $ 72,000   $ 444,362 $ 356,128  
Payment to acquire business net of cash acquired     80,545   $ 31,486
Developed technology trade name and customer relationships [member]          
Business Acquisition [Line Items]          
Intangible assets acquired $ 7,000        
Developed technology and customer list [member]          
Business Acquisition [Line Items]          
Intangible assets acquired 10 years        
Trade names [member]          
Business Acquisition [Line Items]          
Intangible assets acquired 3 years        
Andrew Alliance [Member]          
Business Acquisition [Line Items]          
Aggregate consideration paid for acquird entity $ 80,000        
Business combination equity interest issued or issuable 4,000        
Integrated Softwate Solutions Limited [Member]          
Business Acquisition [Line Items]          
Payment to acquire business net of cash acquired $ 4,000        
Business combination contingent consideration payable     $ 1,000    
Business combination period over which contingent consideration shall be paid     2 years    
Minimum [Member]          
Business Acquisition [Line Items]          
Future contractual obligation to pay a minimum royalty   $ 3,000