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CURRENT AND DEFERRED INCOME TAX - Tax Operating Losses (Details) $ in Thousands | Dec. 31, 2017 USD ($)
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Tax operating losses | $ 466,873
Argentina |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Tax operating losses | 399,680
Mexico |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Tax operating losses | 53,064
Peru |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Tax operating losses | 71
Canada |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Tax operating losses | 6,877
U.S.A. |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |
Tax operating losses | $ 7,181

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