| Summary of Long-term Debt Instruments |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Issuance | | Maturity Date | | Interest Rate | | First Interest Payment Date | | Effective Interest Rate | | Semi-Annual Interest Payment Dates | | Initial Conversion Rate per $1000 principal | | Initial Conversion Price | | Number of shares (in millions) | | | | | | | | | | | | | | | | | | | 2027 Notes | | March 15, 2027 | | 0.25% | | September 15, 2021 | | 0.67% | | March 15 and September 15 | | 9.6734 | | 103.38 | | 5.8 | | 2029 Notes | | March 15, 2029 | | 1.25% | | March 15, 2024 | | 1.69% | | March 15 and September 15 | | 15.4213 | | 64.85 | | 4.6 |
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| Summary of Liability and Equity Components of Convertible Debt |
The net carrying amount of the Notes as of June 30, 2026 and December 31, 2025 was as follows (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2027 Notes | | 2029 Notes | | | | | | | | | Principal | | Unamortized debt issuance costs | | Total | | Principal | | Unamortized debt issuance costs | | Total | | Balance at December 31, 2025 | | | | | | | | $ | 600,000 | | | $ | (3,044) | | | $ | 596,956 | | | $ | 300,000 | | | $ | (4,672) | | | $ | 295,328 | | | Amortization of debt issuance costs | | | | | | | | — | | | 1,250 | | | 1,250 | | | — | | | 692 | | | 692 | | | | | | | | | | | | | | | | | | | | | | Balance at June 30, 2026 | | | | | | | | $ | 600,000 | | | $ | (1,794) | | | $ | 598,206 | | | $ | 300,000 | | | $ | (3,980) | | | $ | 296,020 | | Interest expense related to the Notes was as follows (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended June 30, | | | | | 2026 | | 2025 | | | | | | | 2027 Notes | | 2029 Notes | | Total | | 2025 Notes | | 2027 Notes | | 2029 Notes | | Total | | | | | | | | | | Contractual interest expense | | | | $ | 375 | | | $ | 937 | | | $ | 1,312 | | | $ | 86 | | | $ | 375 | | | $ | 938 | | | $ | 1,399 | | | | | | | | | | | Amortization of debt issuance costs | | | | 631 | | | 354 | | | 985 | | | 24 | | | 627 | | | 348 | | | 999 | | | | | | | | | | | Total interest expense | | | | $ | 1,006 | | | $ | 1,291 | | | $ | 2,297 | | | $ | 110 | | | $ | 1,002 | | | $ | 1,286 | | | $ | 2,398 | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Six Months Ended June 30, | | | | | 2026 | | 2025 | | | | | | | 2027 Notes | | 2029 Notes | | Total | | 2025 Notes | | 2027 Notes | | 2029 Notes | | Total | | | | | | | | | | Contractual interest expense | | | | $ | 750 | | | $ | 1,875 | | | $ | 2,625 | | | $ | 345 | | | $ | 750 | | | $ | 1,875 | | | $ | 2,970 | | | | | | | | | | | Amortization of debt issuance costs | | | | 1,250 | | | 692 | | | 1,942 | | | 97 | | | 1,241 | | | 680 | | | 2,018 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Total interest expense | | | | $ | 2,000 | | | $ | 2,567 | | | $ | 4,567 | | | $ | 442 | | | $ | 1,991 | | | $ | 2,555 | | | 4,988 | | | | | | | | | |
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| Summary of Other Key Terms and Premiums Paid for the Capped Calls Related to Each Series of Notes |
The following table sets forth other key terms and premiums paid for the Capped Calls related to each series of Notes: | | | | | | | | | | | | | | | | | | | | | Capped Calls Entered into in Connection with the Issuance of the 2027 Notes | | Capped Calls Entered into in Connection with the Issuance of the 2029 Notes | | Initial strike price, subject to certain adjustments | | | | $ | 103.38 | | | $ | 64.85 | | | Cap price, subject to certain adjustments | | | | $ | 159.04 | | | $ | 97.88 | | | Total premium paid (in thousands) | | | | $ | 76,020 | | | $ | 36,570 | | | Expiration dates | | | | January 1, 2027 - March 11, 2027 | | February 13, 2029 - March 13, 2029 |
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