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Convertible Senior Notes (Tables)
 6 Months Ended
Jun. 30, 2026
Debt Disclosure [Abstract]  
Schedule of Convertible Debt
The following table presents details of our convertible senior notes, which are further discussed below (original principal in thousands):
Month Issued
Maturity Date
Free Convertibility Date
Redemption Date
Original Principal (including overallotment)
Initial Conversion Rate per $1,000 Principal
Initial Conversion Price
2026 Notes
August 2019August 15, 2026May 15, 2026August 21, 2023$345,000 12.4756$80.16 
2028 Notes
August 2023August 15, 2028May 15, 2028August 21, 2026$702,000 7.4690$133.89 
The net carrying amount of the Notes was as follows (in thousands):
As of June 30, 2026As of December 31, 2025
2026 Notes
2028 Notes
2026 Notes
2028 Notes
Principal$71,242 $702,000 $71,242 $702,000 
Unamortized issuance costs(34)(4,648)(170)(5,737)
Net carrying amount$71,208 $697,352 $71,072 $696,263 

Interest expense related to the Notes was as follows (in thousands):
Three months ended June 30,Six months ended June 30,
2026202520262025
Contractual interest expense$2,394 $2,394 $4,788 $4,788 
Amortization of issuance costs613 610 1,225 1,220 
Total
$3,007 $3,004 $6,013 $6,008