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CONVERTIBLE NOTES - Schedule of Convertible Notes (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
2027 Convertible Notes |  |
Long-term debt |  |
Coupon interest rate | 0.375% | 0.375%
Principal Amount | $ 949,042 | $ 1,150,000
Unamortized Debt Discount and Issuance Costs | (11,134) | (15,775)
Net Carrying Amount | 937,908 | 1,134,225
2027 Convertible Notes | Significant Other Observable Inputs (Level 2) | Fair value |  |
Long-term debt |  |
Amount | $ 811,431 | $ 908,500
2028 Convertible Notes |  |
Long-term debt |  |
Coupon interest rate | 0.375% | 0.375%
Principal Amount | $ 563,822 | $ 747,500
Unamortized Debt Discount and Issuance Costs | (5,856) | (9,445)
Net Carrying Amount | 557,966 | 738,055
2028 Convertible Notes | Significant Other Observable Inputs (Level 2) | Fair value |  |
Long-term debt |  |
Amount | $ 513,078 | $ 612,950
2030 Convertible Notes |  |
Long-term debt |  |
Coupon interest rate | 1.00% | 1.00%
Principal Amount | $ 249,172 | $ 315,005
Unamortized Debt Discount and Issuance Costs | (591) | (1,179)
Net Carrying Amount | 248,581 | 313,826
2030 Convertible Notes | Significant Other Observable Inputs (Level 2) | Fair value |  |
Long-term debt |  |
Amount | $ 276,152 | $ 326,808
Convertible Notes Payable2030 |  |
Long-term debt |  |
Coupon interest rate | 2.00% |
Principal Amount | $ 572,993 |
Unamortized Debt Discount and Issuance Costs | (4,527) |
Net Carrying Amount | 568,466 |
Convertible Notes Payable2030 | Significant Other Observable Inputs (Level 2) | Fair value |  |
Long-term debt |  |
Amount | $ 645,511 |

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