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Convertible Senior Notes - Convertible Debt Balances (Details) - Convertible Debt - Convertible Senior Notes - USD ($)
Mar. 31, 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 (10,731,000) (9,712,000)  
Convertible senior notes, liability component 564,269,000 488,152,000  
Convertible senior notes, equity component $ 0 $ 72,732,000 $ 72,700,000