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Debt (Tables)
 12 Months Ended
Dec. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
Debt, long-term consists of the following commitments as of December 31, 2023 and 2022 (in thousands):
As of December 31,
20232022
Convertible notes$788,909 $785,621 
Term Loan366,404 339,629 
Debt, long-term$1,155,313 $1,125,250 
Schedule of Carrying Value of Term Loan Balance
The following table presents the carrying value of the Company’s Term Loan balance as of December 31, 2023 and 2022 (in thousands):
As of December 31,
20232022
Original Term Loan balance$350,000 $350,000 
Paid-in-kind interest capitalized27,537 4,165 
Term Loan issuance costs, unamortized(11,133)(14,536)
Term Loan$366,404 $339,629 
Schedule of Components of Debt Balance The following table presents the carrying value of the Company’s debt balance as of December 31, 2023 and 2022 (in thousands):
 
As of December 31,
20232022
Face value of outstanding convertible notes$800,000 $800,000 
Debt issuance costs, unamortized(11,091)(14,379)
Convertible notes$788,909 $785,621 
The following table presents the carrying value of the Company’s Royalty Financing Agreement balance as of December 31, 2023 and 2022 (in thousands):
December 31,
20232022
Royalty financing agreement liability - beginning balance$151,538 $150,000 
Revenue Interest Payments paid and payable(12,222)(2,149)
Interest expense recognized18,846 3,687 
  Royalty financing agreement liability - ending balance$158,162 $151,538 
Royalty financing issuance costs, unamortized - beginning balance$(3,523)$(3,624)
Amortization of issuance costs521 101 
Other(126)— 
  Deferred issuance costs, unamortized - ending balance$(3,128)$(3,523)
    Royalty Financing Agreement$155,034 $148,015 
Schedule of Future Principal Repayments of Debt
As of December 31, 2023, future principal repayments of debt for each of the fiscal years through maturity were as follows (in thousands):
 
Year Ending December 31: 
2024$— 
2025225,000 
2026188,769 
2027188,768 
2028575,000 
2029 and thereafter— 
 $1,177,537 
Summary of Interest Expense
Interest expense for the years ended December 31, 2023, 2022, and 2021, is as follows (in thousands):
Years Ended December 31,
202320222021
Convertible debt contractual interest expense$8,250 $8,250 $8,134 
Term Loan contractual interest expense46,743 8,330 — 
Royalty Financing Agreement non-cash interest expense
18,846 3,687 — 
Amortization of debt issuance costs7,320 3,991 1,890 
Amortization of debt discount— — 29,149 
Swap interest (income) expense(1,882)380 — 
Total debt interest expense$79,277 $24,638 $39,173 
Finance lease interest expense2,417 1,808 1,300 
Total interest expense$81,694 $26,446 $40,473