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Convertible Senior Notes (Schedule of Net Carrying Amount) (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Convertible Senior Notes [Abstract]    
Principal amount $ 900,000 $ 900,000
Unamortized debt issuance costs (3,780) (3,933)
Net carrying amount $ 896,220 $ 896,067