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Liabilities - Convertible Senior Notes Carrying Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Nov. 17, 2020
May 18, 2020
Jan. 10, 2017
Debt          
Principal amount $ 257,500 $ 277,673      
Unamortized debt discount/transaction costs (2,787) (3,013)      
Net carrying value 254,713 274,660      
2023 Notes          
Debt          
Principal amount   20,173     $ 345,000
Unamortized debt discount/transaction costs   (4)      
Net carrying value   20,169      
2025 Notes          
Debt          
Principal amount 132,500 132,500 $ 132,500    
Unamortized debt discount/transaction costs (872) (990)      
Net carrying value 131,628 131,510      
2027 Notes          
Debt          
Principal amount 125,000 125,000   $ 125,000  
Unamortized debt discount/transaction costs (1,915) (2,019)      
Net carrying value $ 123,085 $ 122,981