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35. Related-party transactions (Details 3) - ARS ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
SummaryOfRelatedpartyTransactionsLineItems [Line Items]    
Other receivables - Noncurrent $ 4,662 $ 8,015
Other receivables - Current 1,946 1,614
SACME    
SummaryOfRelatedpartyTransactionsLineItems [Line Items]    
Other receivables - Noncurrent 4,662 8,015
Other receivables - Current 766 1,131
PESA    
SummaryOfRelatedpartyTransactionsLineItems [Line Items]    
Other receivables - Current $ 1,180 $ 483