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Convertible Senior Notes (Tables) | 9 Months Ended
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Sep. 30, 2017
Debt Disclosure [Abstract] |
Summary of carrying values and coupon rates on financing arrangements | The following table summarizes information about the equity and liability components of the 2019 Convertible Senior Notes (in thousands).
| September 30, 2017 |  | December 31, 2016
2019 Convertible Senior Notes |  |  |
Principal amount outstanding | $ | 245,000 |  |  | $ | 245,000 |
Unamortized discount (including unamortized debt issuance cost) | (23,443 | ) |  | (32,090 | )
Total current portion of notes payable | $ | 221,557 |  |  | $ | 212,910 |

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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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