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OTHER LIABILITIES - NON CURRENT AND CURRENT (Other liabilities - Current) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Disclosure of other liabilities [Abstract]    
Payroll and social security payable $ 183,249 $ 130,889
VAT liabilities 79,085 49,633
Other tax liabilities 30,927 26,987
Termination benefits 1,816 2,164
Related Parties (Note 26) 6,215 3,744
Asset retirement obligation (Note 19) 2,659 4,262
Others 53,050 10,402
Other liabilities – Current $ 357,001 $ 228,081