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Income Taxes - Disclosure Of Detailed Information About Non Capital Loss Applied To Reduce Future Taxable Income (Detail) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Statements [Line Items] |  |
Non capital loss carryforwards | $ 41,648 | $ 58,304
Brazil [member] |  |
Statements [Line Items] |  |
Non capital loss carryforwards | 6,929 | 16,692
Mexico [member] |  |
Statements [Line Items] |  |
Non capital loss carryforwards |  | 15,988
Canada [member] |  |
Statements [Line Items] |  |
Non capital loss carryforwards | $ 34,719 | 23,420
Peru [member] |  |
Statements [Line Items] |  |
Non capital loss carryforwards |  | 1,544
Chile [member] |  |
Statements [Line Items] |  |
Non capital loss carryforwards |  | $ 660

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