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Long-term debt (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Long-Term Debt1 [Abstract] |
Disclosure of debt instruments |
|  | 2018 |  |  | 2017 |
|  | $ |  |  | $ |
Convertible senior subordinated notes: |  |  |  |
Principal amount |  | — |  |  | 258,750 |
Fair value adjustment |  | — |  |  | 18,900 |
|  | — |  |  | 277,650 |
Revolving credit facility: |  |  |  |
Principal amount |  | 400,000 |  |  | 350,000 |
Less: unamortized transaction costs |  | (4,178 | ) |  | (5,851 | )
|  | 395,822 |  |  | 344,149 |
Equipment loans/finance lease obligations: |  |  |  |
Fekola equipment loan facility (net of unamortized transaction costs) |  | 57,242 |  |  | 50,569 |
Otjikoto equipment loan facility (net of unamortized transaction costs) |  | 10,816 |  |  | 20,750 |
Masbate equipment loan facility (net of unamortized transaction costs) |  | 13,071 |  |  | 7,719 |
Finance lease obligations |  | 2,186 |  |  | — |
Nicaraguan equipment loans |  | 398 |  |  | 1,344 |
|  | 83,713 |  |  | 80,382 |
|  | 479,535 |  |  | 702,181 |
Less: current portion |  | (25,008 | ) |  | (302,630 | )
|  | 454,527 |  |  | 399,551 |
Disclosure Of Long-Term Debt Maturities | The following table summarizes the Company’s scheduled debt repayments on its outstanding debt as at December 31, 2018:
| 2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | Total |
| $ |  | $ |  | $ |  | $ |  | $ |  | $ |
Revolving credit facility: |  |  |  |  |  |
Principal | — |  | — |  | 400,000 |  | — |  | — |  | 400,000 |
Interest & commitment fees (estimated) | 21,731 |  | 21,731 |  | 11,287 |  | — |  | — |  | 54,749 |
Fekola equipment loan facility: |  |  |  |  |  |
Principal | 15,869 |  | 15,869 |  | 15,869 |  | 9,397 |  | 1,630 |  | 58,634 |
Interest (estimated) | 2,764 |  | 1,946 |  | 1,119 |  | 377 |  | 72 |  | 6,278 |
Otjikoto equipment loan facility: |  |  |  |  |  |
Principal | 4,869 |  | 3,453 |  | 1,958 |  | 642 |  | — |  | 10,922 |
Interest (estimated) | 428 |  | 234 |  | 84 |  | 12 |  | — |  | 758 |
Masbate equipment loan facility: |  |  |  |  |  |
Principal | 3,347 |  | 3,347 |  | 3,347 |  | 2,908 |  | 577 |  | 13,526 |
Interest (estimated) | 787 |  | 570 |  | 363 |  | 142 |  | 9 |  | 1,871 |
Finance lease obligations |  |  |  |  |  |
Principal | 525 |  | 525 |  | 525 |  | 525 |  | 86 |  | 2,186 |
Interest (estimated) | 62 |  | 45 |  | 28 |  | 12 |  | — |  | 147 |
Nicaraguan equipment loans: |  |  |  |  |  |
Principal | 398 |  | — |  | — |  | — |  | — |  | 398 |
Interest (estimated) | 9 |  | — |  | — |  | — |  | — |  | 9 |
| 50,789 |  | 47,720 |  | 434,580 |  | 14,015 |  | 2,374 |  | 549,478 |

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