Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details)

v3.19.1
Commitments and Contingencies (Details)
Dec. 27, 2018
USD ($)
Sep. 07, 2018
lawsuit
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Business Acquisition, Contingent Consideration        
Contingent consideration     $ 29,343,000 $ 24,537,000
Payments for legal settlements $ 100,000      
Number of class action lawsuits | lawsuit   7    
Number of derivative lawsuits (at least) | lawsuit   12    
Purchase obligation     93,500,000  
Accrued Liabilities        
Business Acquisition, Contingent Consideration        
Contingent consideration     2,400,000 2,400,000
Other Noncurrent Liabilities        
Business Acquisition, Contingent Consideration        
Contingent consideration     $ 27,000,000.0 $ 22,200,000