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Debt Instruments (Tables) | 6 Months Ended
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Jun. 30, 2017
Debt Instruments |
Schedule of liability components of the Convertible Notes | The Convertible Notes consist of the following (in thousands): as of June 30, 2017 and December 31, 2016:
Liability component |  | June 30, 2017 |  | December 31, 2016 |
Principal |  | $ | 250,000 |  | $ | 250,000 |
Less: debt discount (1) |  | (86,314 | ) | (90,807 | )
Less: deferred financing(1) |  | (4,515 | ) | (4,729 | )
Net carrying value of the debt |  | $ | 159,171 |  | $ | 154,464 |
(1)Included in the Consolidated Balance Sheets within Convertible Senior Notes (due 2023) and amortized to interest expense over the remaining life of the Convertible Senior Notes using the effective interest rate method.
Components of total interest expense recognized related to the Convertible Notes |
Components (In thousands) |  | Three Months ended June 30, 2017 |  | Six Months ended June 30, 2017 |
Contractual interest expense |  | $ | 1,867 |  | $ | 3,754 |
Amortization of deferred financing |  | 80 |  | 222 |
Amortization of debt discount |  | 2,232 |  | 4,493 |
Total |  | $ | 4,179 |  | $ | 8,469 |

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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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- Definition Tabular disclosure of interest income and expense, including, but not limited to, interest income and expense from investments, loans, and securities. + References No definition available. + Details
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