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OTHER FINANCIAL LIABILITIES (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [line items]    
Total obligations with financial institutions $ 7,891,640 $ 8,604,920
Brazil, Brazil Real    
Disclosure of detailed information about property, plant and equipment [line items]    
Total obligations with financial institutions 130 1,253
Chile, Pesos    
Disclosure of detailed information about property, plant and equipment [line items]    
Total obligations with financial institutions 521,122 203,194
United States of America, Dollars    
Disclosure of detailed information about property, plant and equipment [line items]    
Total obligations with financial institutions $ 7,370,388 $ 8,400,473