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FINANCING ARRANGEMENTS (Tables) | 9 Months Ended
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Sep. 30, 2020
Debt Disclosure [Abstract] |
Schedule of Notes | The carrying amount of the Notes consisted of the following as of September 30, 2020 and December 31, 2019 (in thousands):
| September 30, 2020 |  | December 31, 2019
Liability component: |  |  |
Principal amount | $ | 250,000 |  |  | $ | 250,000 |
Less: debt discount | (24,307) |  |  | (35,131) |
Net carrying amount of liability component | $ | 225,693 |  |  | $ | 214,869 |
Net carrying amount of equity component | $ | 67,014 |  |  | $ | 67,014 |
Schedule of Convertible Debt Interest Expense | During the three and nine months ended September 30, 2020 and 2019, we recognized interest costs on the Notes as follows (in thousands):
| Three Months Ended September 30, |  | Nine Months Ended September 30,
| 2020 |  | 2019 |  | 2020 |  | 2019
Contractual interest (3.25% of the principal amount per annum) | $ | 2,032 |  |  | $ | 2,032 |  |  | $ | 6,096 |  |  | $ | 6,096 |
Amortization of debt discount | 3,701 |  |  | 3,341 |  |  | 10,824 |  |  | 9,772 |
Total | $ | 5,733 |  |  | $ | 5,373 |  |  | $ | 16,920 |  |  | $ | 15,868 |

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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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