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Long-Term Debt (Tables) | 3 Months Ended
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Mar. 31, 2021
Debt Disclosure [Abstract] |
Schedule of long-term debt and long-term debt payable to related parties | Long-term debt consisted of the following (in thousands):
| March 31, 2021 |  | December 31, 2020
6.125% Senior Notes | $ | 543,382 |  |  | $ | 542,772 |
Credit Facility | 137,888 |  |  | 137,613 |
Total | $ | 681,270 |  |  | $ | 680,385 |
The carrying amount of the 6.125% Senior Notes was determined as follows (in thousands):
| March 31, 2021 |  | December 31, 2020
Principal balance | $ | 550,000 |  |  | $ | 550,000 |
Less: debt issue cost | 3,367 |  |  | 3,688 |
Less: debt discount | 3,251 |  |  | 3,540 |
Total | $ | 543,382 |  |  | $ | 542,772 |
Interest expense, amortization of debt issue costs and amortization of the debt discount of the 6.125% Senior Notes, included in “Interest (expense) income, net” on the accompanying unaudited condensed consolidated statements of operations, were as follows (in thousands):
|  | Three Months Ended March 31,
|  | 2021 |  | 2020 |  |
Interest expense |  | $ | 8,711 |  |  | $ | 8,693 |  |  |
Debt issue cost amortization |  | 321 |  |  | 321 |  |  |
Debt discount amortization |  | 289 |  |  | 271 |  |  |
Total |  | $ | 9,321 |  |  | $ | 9,285 |  |  |
Details of the Credit Facility are as follows (in thousands):
| March 31, 2021 |  | December 31, 2020
Principal balance | $ | 140,000 |  |  | $ | 140,000 |
Less: Debt issue cost | 2,112 |  |  | 2,387 |
Total | $ | 137,888 |  |  | $ | 137,613 |
Interest expense and amortization of debt issue costs of the Credit Facility, included in “Interest (expense) income, net” on the accompanying unaudited condensed consolidated statements of operations, were as follows (in thousands):
| Three Months Ended March 31,
| 2021 |  | 2020 |  |
Interest expense | $ | 582 |  |  | $ | 1,360 |  |  |
Debt issue cost amortization | 275 |  |  | 186 |  |  |
Unused facility fee | 213 |  |  | 109 |  |  |
Total | $ | 1,070 |  |  | $ | 1,655 |  |  |

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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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