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DEBT (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Disclosure [Abstract] |
Schedule of debt | A summary of the gross carrying amount, unamortized debt cost, debt issuance costs and net carrying value of the liability component of the 2025 Notes are as follows (in thousands):
| December 31, 2020 |  |
Gross carrying amount | $ | 575,000 |  |  |
Unamortized debt discount | 110,110 |  |  |
Debt issuance costs | 11,056 |  |  |
Net carrying amount | $ | 453,834 |  |  |
A summary of the gross carrying amount, unamortized debt cost, debt issuance costs and net carrying value of the liability component of the 2022 Notes are as follows (in thousands):
| December 31, 2020 |  | December 31, 2019
Gross carrying amount | $ | 169,690 |  |  | $ | 299,991 |
Unamortized debt discount | 10,815 |  |  | 31,789 |
Debt issuance costs | 1,297 |  |  | 3,811 |
Net carrying amount | $ | 157,578 |  |  | $ | 264,391 |

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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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