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DERIVATIVE FINANCIAL INSTRUMENTS DERIVATIVE FINANCIAL INSTRUMENTS (Exchange rate derivative contract) (Details) $ in Thousands, € in Millions, R$ in Millions, $ in Millions, $ in Billions | Dec. 31, 2017 USD ($) | Dec. 31, 2017 BRL (R$) | Dec. 31, 2017 EUR (€) | Dec. 31, 2017 COP ($) | Dec. 31, 2017 ARS ($) | Dec. 31, 2016 USD ($)
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Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | $ (338,144) |  |  |  |  | $ (183,459)
Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | (3,999) |  |  |  |  | (286)
Long | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Notional amount |  | R$ 67.2 | € 39.0 |  | $ 6,400 |
Long | Argentina, Pesos | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | (6,534) |  |  |  |  | (316)
Long | Brazil, Brazil Real | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | (1,514) |  |  |  |  | 0
Long | Euro Member Countries, Euros | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | (224) |  |  |  |  | 0
Short | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Notional amount |  | R$ 61.1 | € 5.3 | $ 65.7 | $ 187 |
Short | Argentina, Pesos | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | (533) |  |  |  |  | 0
Short | Colombia, Pesos | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | (17) |  |  |  |  | 0
Short | Brazil, Brazil Real | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | (247) |  |  |  |  | 0
Short | Euro Member Countries, Euros | Forward contract |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |
Derivative financial assets, at fair value | $ 0 |  |  |  |  | $ (30)

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