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Business Acquisitions (Detail) - USD ($)
$ in Thousands
12 Months Ended 24 Months Ended
May 01, 2019
Mar. 04, 2019
Jan. 28, 2019
Dec. 31, 2019
Dec. 31, 2018
Apr. 30, 2021
Business Acquisition [Line Items]            
Identifiable intangible assets       $ 159,700 $ 6,000  
Goodwill, Acquired During Period       469,446 $ 9,228  
Aeryon Lab [Member]            
Business Acquisition [Line Items]            
Cash acquired       5,145    
Net tangible assets       6,097    
Net deferred taxes       (11,130)    
Identifiable intangible assets     $ 44,292      
Goodwill, Acquired During Period     161,518      
Total purchase price     $ 205,900 205,922    
Endeavor [Member]            
Business Acquisition [Line Items]            
Cash acquired       6,687    
Net tangible assets       14,915    
Net deferred taxes       (22,394)    
Identifiable intangible assets   $ 102,740        
Goodwill, Acquired During Period   283,983        
Total purchase price   $ 385,900   385,931    
NEOS [Member]            
Business Acquisition [Line Items]            
Cash acquired       15    
Net tangible assets       1,479    
Identifiable intangible assets $ 6,400          
Goodwill, Acquired During Period 13,987          
Total purchase price $ 21,900     $ 21,881    
NEOS [Member] | Subsequent Event [Member]            
Business Acquisition [Line Items]            
Total purchase price           $ 12,000