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Business Acquisitions (Detail) - USD ($)
$ in Thousands
24 Months Ended
May 01, 2019
Mar. 04, 2019
Jan. 28, 2019
Oct. 16, 2018
Sep. 10, 2018
Apr. 30, 2021
Mar. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]                
Goodwill             $ 1,328,828 $ 1,364,596
Acyclica [Member]                
Business Acquisition [Line Items]                
Business Combination, Consideration Transferred         $ 9,700      
Identifiable Intangible assets         2,700      
Goodwill         $ 7,000      
SeaPilot [Member]                
Business Acquisition [Line Items]                
Business Combination, Consideration Transferred       $ 4,700        
Identifiable Intangible assets       1,700        
Goodwill       $ 3,000        
Aeryon [Member]                
Business Acquisition [Line Items]                
Business Combination, Consideration Transferred     $ 205,900          
Intangible assets acquired     44,400          
Goodwill     $ 161,500          
Endeavor [Member]                
Business Acquisition [Line Items]                
Business Combination, Consideration Transferred   $ 385,931            
Intangible assets acquired   102,700            
Identifiable Intangible assets   102,740            
Goodwill   $ 271,365            
NEOS [Member]                
Business Acquisition [Line Items]                
Business Combination, Consideration Transferred $ 21,900              
Identifiable Intangible assets 6,400              
Goodwill $ 14,000              
Subsequent Event | NEOS [Member]                
Business Acquisition [Line Items]                
Business Combination, Consideration Transferred           $ 12,000