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Convertible Senior Notes - Convertible Debt Balances (Details) - Convertible Debt - Convertible Senior Notes - USD ($)
Jun. 30, 2022
Dec. 31, 2021
Sep. 25, 2020
Liability:      
Principal amount $ 575,000,000 $ 575,000,000 $ 575,000,000
Unamortized discount 0 (77,136,000)  
Unamortized debt issuance costs (9,965,000) (9,712,000)  
Convertible senior notes, liability component 565,035,000   461,800,000
Convertible senior notes, liability component 565,000,000 488,152,000  
Convertible senior notes, equity component $ 0 $ 72,732,000 $ 72,700,000