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27. Benefit plans (Details 5)
$ in Thousands
Dec. 31, 2019
ARS ($)
2020  
SummaryOfBenefitPlansLineItems [Line Items]  
Benefit payment obligations $ 51,119
2021  
SummaryOfBenefitPlansLineItems [Line Items]  
Benefit payment obligations 9,117
2022  
SummaryOfBenefitPlansLineItems [Line Items]  
Benefit payment obligations 9,499
2023  
SummaryOfBenefitPlansLineItems [Line Items]  
Benefit payment obligations 10,507
2024  
SummaryOfBenefitPlansLineItems [Line Items]  
Benefit payment obligations 3,011
2025 to 2029  
SummaryOfBenefitPlansLineItems [Line Items]  
Benefit payment obligations $ 12,763