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Debt (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Debt |
Schedule of carrying value of the convertible senior notes |
|  | December 31, |
|  | 2017 |
|  | (in thousands) |
Principal amount |  | $ | 345,000 |
Unamortized debt discount |  | (63,022 | )
Unamortized transaction costs |  | (6,348 | )
Net carrying value |  | $ | 275,630 |
Schedule of interest expense related to the convertible senior notes |
|  | For the year ended December 31, |
|  | 2017 |
|  | (in thousands) |
Cash Interest Expense |  |  |
Coupon interest expense |  | $ | 8,901 |
Non-Cash Interest Expense |  |  |
Amortization of debt discount |  | 9,490 |
Amortization of transaction costs |  | 956 |
Total Interest Expense |  | $ | 19,347 |

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- Definition Tabular disclosure of borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. Disclosures include, but are not limited to, principal amount, amortized premium or discount, and amount of liability and equity components. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of information relating to interest expense. + References No definition available. + Details
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