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v3.20.1

Mineral Properties, Plant and Equipment - Rollforward of Carrying Value (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | $ 1,301,002 | $ 1,336,683
Additions | 263,733 | 149,020
Tahoe acquisition (Note 8) | 1,239,401 |
Disposals | (4,484) | (1,333)
Depreciation and amortisation expense | (253,453) | (147,289)
Depreciation charge captured in inventory | (33,810) | (12,620)
(Impairment charges) reversals | (40,050) | (27,789)
Reversals of impairment | 40,050 | 27,789
Transfers | 0 | 0
Closure and decommissioning – changes in estimate (Note 17) | 32,562 | 4,330
Carrying value, ending | 2,504,901 | 1,301,002
Cost | 5,181,329 | 3,710,845
Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | (2,409,843) |
Carrying value, ending | (2,676,428) | (2,409,843)
Other property, plant and equipment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | 299,907 | 244,863
Additions | 68,664 | 16,896
Tahoe acquisition (Note 8) | 455,080 |
Disposals | (2,010) | (937)
Depreciation and amortisation expense | (140,386) | (78,354)
Depreciation charge captured in inventory | 0 | 0
(Impairment charges) reversals | 0 |
Reversals of impairment |  | 532
Transfers | 90,419 | 117,971
Closure and decommissioning – changes in estimate (Note 17) | 0 | 0
Carrying value, ending | 771,674 | 299,907
Cost | 1,476,170 | 939,993
Other property, plant and equipment [member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | (640,086) |
Carrying value, ending | (704,496) | (640,086)
Depletable, Reserves and Resources [member] | Mining property [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | 678,489 | 766,883
Additions | 152,033 | 106,701
Tahoe acquisition (Note 8) | 314,604 |
Disposals | (2,461) | 0
Depreciation and amortisation expense | (113,067) | (68,935)
Depreciation charge captured in inventory | (33,810) | (12,620)
(Impairment charges) reversals | 0 |
Reversals of impairment |  | 2,144
Transfers | (77,598) | (115,726)
Closure and decommissioning – changes in estimate (Note 17) | 32,562 | 4,330
Carrying value, ending | 950,752 | 678,489
Cost | 2,429,815 | 1,997,880
Depletable, Reserves and Resources [member] | Mining property [member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | (1,319,391) |
Carrying value, ending | (1,479,063) | (1,319,391)
Non-depletable, Reserves and Resources [member] | Mining property [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | 73,375 | 71,809
Additions | 42,487 | 25,423
Tahoe acquisition (Note 8) | 274,817 |
Disposals | (13) | (396)
Depreciation and amortisation expense | 0 | 0
Depreciation charge captured in inventory | 0 | 0
(Impairment charges) reversals | (33,245) |
Reversals of impairment |  | 25,113
Transfers | (25,872) | 1,652
Closure and decommissioning – changes in estimate (Note 17) | 0 | 0
Carrying value, ending | 331,549 | 73,375
Cost | 398,485 | 104,614
Non-depletable, Reserves and Resources [member] | Mining property [member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | (31,239) |
Carrying value, ending | (66,936) | (31,239)
Non-depletable, Exploration and Evaluation [member] | Mining property [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | 249,231 | 253,128
Additions | 549 | 0
Tahoe acquisition (Note 8) | 194,900 |
Disposals | 0 | 0
Depreciation and amortisation expense | 0 | 0
Depreciation charge captured in inventory | 0 | 0
(Impairment charges) reversals | (6,805) |
Reversals of impairment |  | 0
Transfers | 13,051 | (3,897)
Closure and decommissioning – changes in estimate (Note 17) | 0 | 0
Carrying value, ending | 450,926 | 249,231
Cost | 876,859 | 668,358
Non-depletable, Exploration and Evaluation [member] | Mining property [member] | Accumulated depreciation, amortisation and impairment [member] |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |
Carrying value, beginning | (419,127) |
Carrying value, ending | $ (425,933) | $ (419,127)

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