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Income tax and deferred taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Statement [Line Items] |  |  |
Deferred tax assets | $ 604,471 | $ 135,904 |
Deferred tax liabilities | (289,825) | (246,320) |
Total | 314,646 | (110,416) | $ (156,101)
Unrealized loss |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 655,695 | 144,181 |
Deferred tax liabilities |  | 0 |
Total | 655,695 | 144,181 | 90,585
Property, plant and equipment and capitalized interest |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 0 | 0 |
Deferred tax liabilities | (244,560) | (189,073) |
Total | (244,560) | (189,073) | (187,168)
Restoration and rehabilitation provision |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 4,685 | 6,567 |
Deferred tax liabilities | 0 | 0 |
Total | 4,685 | 6,567 |
Manufacturing expenses |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 0 | 0 |
Deferred tax liabilities | (139,383) | (108,181) |
Total | (139,383) | (108,181) | (107,215)
Employee benefits and unemployment insurance |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 0 | 0 |
Deferred tax liabilities | (8,995) | (7,485) |
Total | (8,995) | (7,486) | (6,669)
Vacation accrual |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 7,650 | 6,039 |
Deferred tax liabilities | 0 | 0 |
Total | 7,650 | 6,039 | 6,138
Inventory provision |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 27,512 | 20,557 |
Deferred tax liabilities | 0 | 0 |
Total | 27,512 | 20,557 | 22,200
Materials provision |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 11,915 | 10,554 |
Deferred tax liabilities | 0 | 0 |
Total | 11,915 | 10,554 | 8,812
Others employee benefits |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 1,177 | 929 |
Deferred tax liabilities | 0 | 0 |
Research and development expenses |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 0 | 0 |
Deferred tax liabilities | (12,294) | (5,387) |
Total | (12,294) | (5,387) | (3,581)
Bad debt provision |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 715 | 2,708 |
Deferred tax liabilities | 0 | 0 |
Total | 715 | 2,708 | 5,072
Provision for legal complaints and expenses |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 6,827 | 334 |
Deferred tax liabilities | 0 | 0 |
Total | 6,827 | 334 | 19,637
Loan approval expenses |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 0 |  |
Deferred tax liabilities | (8,793) |  |
Total | (8,793) | (8,967) | (5,212)
Junior mining companies valued based on stock price |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 5,226 |  |
Deferred tax liabilities | 0 |  |
Total | 5,226 | 5,243 | (3,929)
Royality |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 0 |  |
Deferred tax liabilities | (5,799) |  |
Total | (5,799) | (4,545) | (3,012)
Loan acquisition expenses |  |  |
Statement [Line Items] |  |  |
Deferred tax assets |  | 0 |
Deferred tax liabilities |  | (8,967) |
Financial instruments recorded at market value |  |  |
Statement [Line Items] |  |  |
Deferred tax assets |  | 5,242 |
Deferred tax liabilities |  | 0 |
Specific tax on mining activity |  |  |
Statement [Line Items] |  |  |
Deferred tax assets |  | 0 |
Deferred tax liabilities |  | (4,545) |
Tax loss benefit |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 10,059 | 7,113 |
Deferred tax liabilities | 0 | 0 |
Total | 8,615 | 7,113 | 844
Other |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 2,913 | 8,862 |
Deferred tax liabilities | 0 | 0 |
Total | 16,049 | 8,862 | 1,454
Foreign items (other) |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 96 | 136 |
Deferred tax liabilities | 0 |  |
Total | (11,596) | 136 | $ (654)
Balances to date |  |  |
Statement [Line Items] |  |  |
Deferred tax assets | 734,470 | 213,222 |
Deferred tax liabilities | $ (419,824) | $ (323,638) |

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