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26. Salaries and social security taxes payable (Details 1) - ARS ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
SummaryOfSalariesAndSocialSecurityTaxesPayableLineItems [Line Items]      
Salaries and social security taxes $ 8,748,639 $ 9,261,510 $ 10,459,433
Salaries      
SummaryOfSalariesAndSocialSecurityTaxesPayableLineItems [Line Items]      
Salaries and social security taxes 6,299,020 6,668,287 7,530,793
Social security taxes      
SummaryOfSalariesAndSocialSecurityTaxesPayableLineItems [Line Items]      
Salaries and social security taxes $ 2,449,619 $ 2,593,223 $ 2,928,640