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Convertible Senior Notes (Interest Expense) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Convertible Senior Notes [Abstract]      
Contractual interest expense $ 13,500 $ 11,812
Amortization of debt issuance costs 617 532
Total interest expense $ 14,117 $ 12,344