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6. Critical accounting estimates and judgments (Details 1)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
ARS ($)
Critical Accounting Estimates And Judgments Details Abstract  
Amount of the provisions for impairment of the trade receivables by IAS 39 $ (458,853)
Adjustment of expected losses IFRS 9 (82,041)
Amount of the provisions for impairment of the trade receivables by IAS 39 $ (540,894)