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Acquisitions (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 23, 2019
Sep. 16, 2019
Apr. 17, 2017
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Business Acquisition [Line Items]            
Goodwill       $ 599,351 $ 487,617  
Accent acquisition            
Business Acquisition [Line Items]            
Consideration transferred $ 158,600          
Acquisition related costs       2,100    
Intellectual property subject to amortization 68,400          
Goodwill $ 81,545          
Revenue       675,259 650,203  
Vitreos acquisition            
Business Acquisition [Line Items]            
Consideration transferred   $ 36,600        
Intellectual property subject to amortization   6,000        
Goodwill   $ 30,200        
Eliza Holding Corp            
Business Acquisition [Line Items]            
Acquisition related costs           $ 4,500
Percentage of voting interest acquired     100.00%      
Purchase price of acquisition     $ 171,600      
Funding source, cash on hand (as a percent)     75.00%      
Funding source, existing credit line (as a percent)     25.00%      
Revenue       $ 52,500 $ 51,900 $ 30,400