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Capital and Reserves - Additional Information (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
ARS ($)
Vote
$ / shares
shares
Dec. 31, 2019
ARS ($)
Dec. 31, 2018
ARS ($)
Nov. 20, 2020
ARS ($)
May 15, 2020
ARS ($)
Apr. 24, 2019
Capital And Reserves [Line Items]            
Percent of legal reserve 20.00%          
Dividends paid $ 3,063,448 $ 5,040,938 $ 2,737,131      
Distribution of dividend in nominal value       $ 12,000,000 $ 2,500,000  
BBVA Francs Valores SA [Member]            
Capital And Reserves [Line Items]            
Par value per share issued | $ / shares $ 1          
AcquisitionDate Percentage of Equity Interest in Acquiree held by Acquirer Immediately before Acquisition Date           95.00%
Number of shares issued | shares 50,441          
Common Shares Issued Voting Rights Per Share | Vote 1