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Acquisitions (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 23, 2019
Sep. 16, 2019
Mar. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]        
Goodwill     $ 597,803 $ 599,351
Accent acquisition        
Business Acquisition [Line Items]        
Acquisition of a business, net of cash acquired $ 158,600      
Increase in accounts receivable     1,500  
Change in carrying value of goodwill     (1,500)  
Acquisition related costs       $ 2,100
Revenue contributed     $ 10,900  
Intangible assets 68,400      
Goodwill $ 79,997      
VitreosHealth, Inc.        
Business Acquisition [Line Items]        
Aggregate consideration   $ 36,600    
Intangible assets   6,000    
Goodwill   $ 30,200