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Subsequent Events (Details) - USD ($)
$ in Thousands
1 Months Ended
Apr. 13, 2020
Apr. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Aug. 14, 2017
Subsequent Event [Line Items]          
Debt principal balance     $ 75,000 $ 75,000  
Subsequent Event | 2.25% Convertible Senior Notes          
Subsequent Event [Line Items]          
Interest rate (as a percent) 2.25% 2.25%      
Common stock that may be issued upon conversion of notes 9,634,700 9,634,700      
Net proceeds $ 278,900 $ 278,900      
Debt principal balance $ 287,500 287,500      
2017 Term Loan          
Subsequent Event [Line Items]          
Debt principal balance         $ 75,000
2017 Term Loan | Subsequent Event          
Subsequent Event [Line Items]          
Repayment of Term Loan   79,200      
Debt principal balance   75,000      
Debt extinguishment costs   $ 4,200