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23. Salaries and social security taxes payable (Details 1) - ARS ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
SummaryOfSalariesAndSocialSecurityTaxesPayableLineItems [Line Items]      
Salaries and social security taxes $ 6,022,963 $ 6,801,999 $ 6,953,605
Salaries      
SummaryOfSalariesAndSocialSecurityTaxesPayableLineItems [Line Items]      
Salaries and social security taxes 4,336,533 4,897,440 5,006,596
Social security taxes      
SummaryOfSalariesAndSocialSecurityTaxesPayableLineItems [Line Items]      
Salaries and social security taxes $ 1,686,430 $ 1,904,559 $ 1,947,009