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DERIVATIVE FINANCIAL INSTRUMENTS (Exchange rate derivative contract) (Details)
$ in Thousands, € in Millions, R$ in Millions, $ in Millions, $ in Billions
Dec. 31, 2018
USD ($)
Dec. 31, 2018
EUR (€)
Dec. 31, 2018
COP ($)
Dec. 31, 2018
ARS ($)
Dec. 31, 2018
BRL (R$)
Dec. 31, 2017
USD ($)
Disclosure of detailed information about financial instruments [line items]            
Financial assets, at fair value $ 178,673         $ 338,144
Financial liabilities, at fair value (12,981)         (6,001)
Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Financial liabilities, at fair value (12,211)         (3,999)
Long | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Notional amount   € 212.9   $ 6,400.0 R$ 34.5  
Long | Euro Member Countries, Euro | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Financial assets, at fair value           224
Financial liabilities, at fair value (12,954)          
Long | Brazil, Brazil Real | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Financial assets, at fair value           1,514
Financial liabilities, at fair value (493)          
Long | Argentina, Pesos | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Financial assets, at fair value 0          
Financial liabilities, at fair value           (6,534)
Short | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Notional amount   € 1.9 $ 194.9 $ 187.0 R$ 32.0  
Short | Euro Member Countries, Euro | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Financial assets, at fair value           0
Financial liabilities, at fair value (27)          
Short | Brazil, Brazil Real | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Financial assets, at fair value 1,154         247
Short | Colombia, Pesos | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Financial assets, at fair value 109         17
Short | Argentina, Pesos | Forward contract            
Disclosure of detailed information about financial instruments [line items]            
Financial assets, at fair value $ 0         $ 533