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TRADE RECEIVABLES, NET - NON CURRENT AND CURRENT (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Trade and other receivables [abstract]    
Trade receivables, net – Non-current $ 4,832 $ 1,270
Current accounts 926,310 633,622
Trade receivables with related parties 96,831 6,142
Allowance for doubtful accounts (16,543) (6,019)
Trade receivables, net - Current $ 1,006,598 $ 633,745