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Senior Notes (Tables) | 12 Months Ended
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Dec. 31, 2019
Debt Disclosure [Abstract] |
Schedule of Carrying Values | The carrying value of the Senior Notes at December 31, 2018 and December 31, 2019 are reflected in our Consolidated Balance Sheet as follows (in thousands):
| December 31, 2018 | December 31, 2019
Long-term liabilities: |  |
Principal amount | $ | 325,000 |  | $ | 400,000 |
Debt premium | — |  | 1,688 |
Debt discount, net of accumulated amortization of $273 and $492, respectively | (4,602 | ) | (4,110 | )
Debt issuance costs, net of accumulated amortization of $77 and $216, respectively | (1,290 | ) | (2,131 | )
Carrying value of the Senior Notes | $ | 319,108 |  | $ | 395,447 |
Schedule of Maturities of Long-term Debt | The aggregate maturities of our long-term debt for the next five years subsequent to December 31, 2019 and thereafter are as follows (in thousands):
Years ending December 31, |
2020 | $ | 1,289 |
2021 | 1,023 |
2022 | 523 |
2023 | 84,363 |
2024 | 550 |
Thereafter | 3,016 |
Total | $ | 90,764 |
The aggregate maturities of our Convertible Notes for the five years subsequent to December 31, 2019 are as follows (in thousands):
|  | Principal Maturity |  | Discount Amortization |  | Present Value
Years ending December 31, |  |  |  |  |  |
2020 |  | $ | — |  |  | $ | (270 | ) |  | $ | (270 | )
2021 |  | 6,319 |  |  | (49 | ) |  | 6,270 |
2022 |  | — |  |  | — |  |  | — |
2023 |  | — |  |  | — |  |  | — |
2024 |  | — |  |  | — |  |  | — |
Thereafter |  | — |  |  | — |  |  | — |
Total |  | $ | 6,319 |  |  | $ | (319 | ) |  | $ | 6,000 |
The aggregate maturities of our Senior Notes for the five years subsequent to December 31, 2019 are as follows (in thousands):
|  | Principal Maturity |  | Discount Amortization |  | Premium Amortization |  | Present Value
Years ending December 31, |  |  |  |  |  |  |  |
2020 |  | $ | — |  |  | $ | (528 | ) |  | $ | 221 |  |  | $ | (307 | )
2021 |  | — |  |  | (565 | ) |  | 235 |  |  | (330 | )
2022 |  | — |  |  | (605 | ) |  | 250 |  |  | (355 | )
2023 |  | — |  |  | (648 | ) |  | 266 |  |  | (382 | )
2024 |  | — |  |  | (694 | ) |  | 283 |  |  | (411 | )
Thereafter |  | 400,000 |  |  | (1,070 | ) |  | 433 |  |  | 399,363 |
Total |  | $ | 400,000 |  |  | $ | (4,110 | ) |  | $ | 1,688 |  |  | $ | 397,578 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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