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Deposits guarantee regime - Additional Information (Detail) - ARS ($)
$ in Thousands
 12 Months Ended
May 01, 2020
Feb. 28, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Deposits Guarantee Regime [Line Items]          
Contributions to the Deposits Guarantee Fund     $ 1,126,106 $ 1,051,597 $ 1,244,995
Percentage of Shares in SEDESA     10.038%    
Bottom of range [member]          
Deposits Guarantee Regime [Line Items]          
Refund of guarantee amount     $ 450    
Argentine Central Bank [member]          
Deposits Guarantee Regime [Line Items]          
Increase in contribution of deposits guarantee fund $ 1,500        
BCRA [member] | Bottom of range [member]          
Deposits Guarantee Regime [Line Items]          
Increase in contribution of deposits guarantee fund   $ 450      
BCRA [member] | Top of range [member]          
Deposits Guarantee Regime [Line Items]          
Increase in contribution of deposits guarantee fund   $ 1,000