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Trade and other receivables, net (Details 4) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of Trade and other receivables, net [Line Items]      
Beginning balance $ 32,184 $ 31,607 $ 26,520
Provision for other receivable, note 26 1,334 0 0
Provision for trade receivables, note 24 18 676 5,087
Provision of the period 1,352 676 5,087
Write off of the period (410) 0 0
Exchange difference (173) 0 0
Reversals of the period, note 26 (45) (99) 0
Other minor (806) 0 0
Final balance 32,102 32,184 31,607
Trade receivables 22,013 [1] 22,823 [1] 22,644
Other receivables $ 10,089 $ 9,361 $ 8,963
[1] Below is presented the movement in the allowance for expected credit losses: