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Debt (Tables) | 3 Months Ended
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Mar. 31, 2021
Debt Disclosure [Abstract] |
Summary of value changes to the notes | The net carrying value of the Convertible Senior Notes, net of unamortized debt discount and unamortized debt issuance costs were as follows (in thousands):
|  | March 31, 2021
Convertible Senior Notes due 2026 |  | $ | 600,000 |
Less unamortized debt discount |  | (5,934) |
Less unamortized debt issuance costs |  | (2,583) |
Carrying value as of March 31, 2021 |  | $ | 591,483 |
The carrying amount is the par value of the Convertible Senior Notes less the debt discount and debt issuance costs that are amortized to interest expense using the effective interest method over the term of the Convertible Senior Notes. The effective interest rate for the Convertible Senior Notes is 0.36%. The following sets forth the interest expense recognized related to the Convertible Senior Notes (in thousands):
|  | Three Months Ended March 31, |
|  | 2021 |  |  |  |
Contractual interest expense |  | $ | 83 |  |  |  |  |
Amortization of debt discount |  | 66 |  |  |  |  |
Amortization of debt issuance costs |  | 29 |  |  |  |  |
Total |  | $ | 178 |  |  |  |  |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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