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Convertible Senior Notes (Tables)
 6 Months Ended
Jun. 30, 2023
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The total net proceeds from the notes are as follows (in thousands):
2026 Notes2025 Notes
Principal amount$1,000,000 $800,000 
Less initial purchasers’ discount(15,000)(18,998)
Less other issuance costs(904)(822)
Net proceeds$984,096 $780,180 
Schedule of Debt
The net carrying amount of the notes is as follows (in thousands):
June 30, 2023December 31, 2022
2026 Notes2025 Notes2026 Notes2025 Notes
Principal$414,198 $358,914 $500,000 $699,979 
Unamortized issuance costs(3,466)(2,603)(4,837)(6,549)
Net carrying amount$410,732 $356,311 $495,163 $693,430 
Schedule Of Interest Expense Recognized
The following table sets forth the total interest expense recognized related to the notes (in thousands):

Three Months Ended June 30,Six Months Ended June 30,
2023202220232022
2026 notes:
Contractual interest expense$— $— $— $— 
Amortization of issuance costs310 657 635 1,307 
Total 2026 notes interest expense$310 $657 $635 $1,307 
2025 notes:
Contractual interest expense$182 $219 $398 $434 
Amortization of issuance costs621 740 1,353 1,472 
Total 2025 notes interest expense$803 $959 $1,751 $1,906