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v3.21.1

Property, plant and equipment (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [abstract] |
Summary of property, plant and equipment |
| Land and buildings | Plant and equipment | Capital works in progress | Mineral properties | Capitalized Evaluation | Total
Cost |  |  |  |  |  |
Balance at January 1, 2019 | $ | 192,244 |  | $ | 2,112,033 |  | $ | 109,361 |  | $ | 4,169,157 |  | $ | 93,459 |  | $ | 6,676,254 |
Additions/transfers (1) | 17,379 |  | 85,929 |  | 19,735 |  | 68,794 |  | 3,393 |  | 195,230 |
IFRS 16 transition adjustment | 7,555 |  | 1,734 |  | 90 |  | — |  | — |  | 9,379 |
Proceeds on pre-commercial production sales, net | — |  | — |  | — |  | (12,159) |  | — |  | (12,159) |
Commercial production transfers | 27,070 |  | 92,791 |  | — |  | (119,861) |  | — |  | — |
(Impairment) reversal | — |  | 11,690 |  | (15,268) |  | — |  | — |  | (3,578) |
Write-down of assets | — |  | (1,979) |  | — |  | — |  | (16) |  | (1,995) |
Other movements/transfers | (1,715) |  | 33,335 |  | (30,103) |  | (505) |  | (129) |  | 883 |
Transfer to assets held for sale (Note 32) | — |  | (11,690) |  | — |  | — |  | — |  | (11,690) |
Disposals | (22) |  | (4,455) |  | (737) |  | (2,421) |  | — |  | (7,635) |
Balance at December 31, 2019 | $ | 242,511 |  | $ | 2,319,388 |  | $ | 83,078 |  | $ | 4,103,005 |  | $ | 96,707 |  | $ | 6,844,689 |
Additions/transfers (1) | $ | 14,737 |  | $ | 82,285 |  | $ | 61,135 |  | $ | 55,971 |  | $ | 2,115 |  | $ | 216,243 |
Write-down of assets | — |  | — |  | (40,030) |  | — |  | — |  | (40,030) |
Other movements/transfers | 1,841 |  | 22,371 |  | (20,594) |  | (2,217) |  | (28) |  | 1,373 |
Disposals | (402) |  | (10,297) |  | (76) |  | — |  | (102) |  | (10,877) |
Balance at December 31, 2020 | $ | 258,687 |  | $ | 2,413,747 |  | $ | 83,513 |  | $ | 4,156,759 |  | $ | 98,692 |  | $ | 7,011,398 |
Accumulated depreciation |  |  |  |  |  |
Balance at January 1, 2019 | $ | (47,974) |  | $ | (1,008,763) |  | $ | — |  | $ | (1,631,041) |  | $ | — |  | $ | (2,687,778) |
Depreciation for the year | (10,605) |  | (107,654) |  | — |  | (51,965) |  | — |  | (170,224) |
Impairment reversal | — |  | 90,825 |  | — |  | 9,667 |  | — |  | 100,492 |
Other movements | (206) |  | (1,049) |  | — |  | 213 |  | — |  | (1,042) |
Disposals | 7 |  | 2,058 |  | — |  | — |  | — |  | 2,065 |
Balance at December 31, 2019 | $ | (58,778) |  | $ | (1,024,583) |  | $ | — |  | $ | (1,673,126) |  | $ | — |  | $ | (2,756,487) |
Depreciation for the year | $ | (13,898) |  | $ | (159,759) |  | $ | — |  | $ | (84,947) |  | $ | — |  | $ | (258,604) |
Other movements | (125) |  | (1,985) |  | — |  | 247 |  | — |  | (1,863) |
Disposals | 54 |  | 3,880 |  | — |  | 115 |  | — |  | 4,049 |
Balance at December 31, 2020 | $ | (72,747) |  | $ | (1,182,447) |  | $ | — |  | $ | (1,757,711) |  | $ | — |  | $ | (3,012,905) |
Carrying amounts |  |  |  |  |  |
At January 1, 2019 | $ | 144,270 |  | $ | 1,103,270 |  | $ | 109,361 |  | $ | 2,538,116 |  | $ | 93,459 |  | $ | 3,988,476 |
At December 31, 2019 | $ | 183,733 |  | $ | 1,294,805 |  | $ | 83,078 |  | $ | 2,429,879 |  | $ | 96,707 |  | $ | 4,088,202 |
Balance at December 31, 2020 | $ | 185,940 |  | $ | 1,231,300 |  | $ | 83,513 |  | $ | 2,399,048 |  | $ | 98,692 |  | $ | 3,998,493 |
(1)There were no amounts included in property, plant and equipment that relate to capitalized interest during the year ended December 31, 2020 (2019 - $3,848 capitalized).
Summary of key assumptions used for assessing recoverable amount of company's CGUs versus carrying values |
| 2020 | 2019
Gold price ($/oz) | $1,850 - $1,550 | $1,400 |
Silver price ($/oz) | $25 - $21 | $18 |
Lead price ($/t) | $2,000 - $1,975 | $2,100 |
Zinc price ($/t) | $2,575 - $2,400 | $2,400 |
Discount rate | 6.0% - 6.5% | 6.0 | %
In advance of signing an amended investment agreement with the Hellenic Republic in early 2021, the Company determined that certain of its capital works in progress at Olympias would no longer be required and will not be completed. Accordingly, capitalized costs of $40,030 were recorded as a write-down of assets as at December 31, 2020.

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