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Income tax (Summary of Tax Losses Accumulated) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure Of Income tax [Line Items] |  |  |
Unused tax losses, deferred tax asset was recognised | $ 348,010 | $ 456,444 | $ 378,422
Chile [Member] |  |  |
Disclosure Of Income tax [Line Items] |  |  |
Unused tax losses, deferred tax asset was recognised | 285,456 | 403,258 | 317,644
Brazil [Member] |  |  |
Disclosure Of Income tax [Line Items] |  |  |
Unused tax losses, deferred tax asset was recognised | 26,781 | 32,452 | 37,848
Argentina [Member] |  |  |
Disclosure Of Income tax [Line Items] |  |  |
Unused tax losses, deferred tax asset was recognised | $ 35,773 | $ 20,734 | $ 22,930

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