v3.19.3

INDEBTEDNESS (Tables) | 9 Months Ended
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Sep. 30, 2019
Debt Disclosure [Abstract] |
Net Carrying Amount of Convertible Notes | The net carrying amount of the Notes were as follows (in thousands):
| Principal outstanding |  | Unamortized debt discount |  | Unamortized debt issuance costs |  | Net carrying value
September 30, 2019 |  |  |  |  |  |  |
2023 Notes | $ | 862,500 |  |  | $ | (117,932 | ) |  | $ | (3,647 | ) |  | $ | 740,921 |
2022 Notes | 211,726 |  |  | (21,400 | ) |  | (2,378 | ) |  | 187,948 |
Total | $ | 1,074,226 |  |  | $ | (139,332 | ) |  | $ | (6,025 | ) |  | $ | 928,869 |
December 31, 2018 |  |  |  |  |  |  |
2023 Notes | $ | 862,500 |  |  | $ | (138,924 | ) |  | $ | (5,054 | ) |  | $ | 718,522 |
2022 Notes | 211,728 |  |  | (27,569 | ) |  | (2,986 | ) |  | 181,173 |
| $ | 1,074,228 |  |  | $ | (166,493 | ) |  | $ | (8,040 | ) |  | $ | 899,695 |
The net carrying amount of the equity component of the 2023 Notes and 2022 Notes were as follows (in thousands):
| Amount allocated to conversion option |  | Less: allocated issuance costs |  | Equity component, net
September 30, 2019 and December 31, 2018 |  |  |  |  |
2023 Notes | $ | 155,250 |  |  | $ | (1,231 | ) |  | $ | 154,019 |
2022 Notes | 41,481 |  |  | (1,108 | ) |  | 40,373 |
Total | $ | 196,731 |  |  | $ | (2,339 | ) |  | $ | 194,392 |
Interest Expense on Convertible Notes | The Company recognized interest expense on the Notes as follows (in thousands, except for percentages):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2019 |  | 2018 |  | 2019 |  | 2018
Contractual interest expense | $ | 1,277 |  |  | $ | 1,469 |  |  | $ | 3,831 |  |  | $ | 2,732 |
Amortization of debt discount and issuance costs | 9,843 |  |  | 11,627 |  |  | 29,176 |  |  | 22,850 |
Total | $ | 11,120 |  |  | $ | 13,096 |  |  | $ | 33,007 |  |  | $ | 25,582 |

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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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