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Basis for Preparation of Financial Statements and Applicable Accounting Standards - Additional Information (Detail) - ARS ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Aug. 31, 2020
Jul. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2021
Basis for preparation of financial statements and applicable accounting standards [line items]                
Inflation rate       36.14% 53.83%      
Number of stock settled 1     1        
Applicable tax rate       30.00% 30.00% 30.00% 35.00%  
Withholding Dividend Distribution Tax Rate               13.00%
Income recognize in the consolidated statement of income       $ 13,978,694 $ 10,799,758 $ 2,641,829    
Profit / (loss) for the fiscal year from financial instruments at fair value through OCI       859,267 $ 88,591 $ (952,750)    
Effect of overlay approach reclassification [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Amortised cost $ 8,287,135     8,287,135        
Fair value 8,314,307     8,314,307        
Reclassification gain on Investment       $ 27,172        
Effect of overlay approach reclassification [member] | Foreign Government securities [member] | Federal Government Treasury Bonds adjusted by Cer 1% - Maturity 08/05/2021 [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Amortised cost   $ 5,116,512 $ 2,603,590          
Fair value   5,511,940 3,604,389          
Reclassification gain on Investment   395,428 1,000,799          
Borrowings, maturity       08/05/2021        
Effect of overlay approach reclassification [member] | Foreign Government securities [member] | Federal Government Treasury Bonds with CER 2.5% adjustment – Maturity 07/22/2021 [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Fair value through profit or loss   $ 5,034,995 $ 4,150,395          
Borrowings, maturity       07/22/2021        
Borrowings, interest rate   33.31% 31.45%          
Effect of overlay approach reclassification [member] | Foreign Government securities [member] | Federal Government Treasury Bonds with CER 2.5% adjustment – Maturity 07/22/2021 [member] | July 2020 [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Fair value 4,214,500     $ 4,214,500        
Income recognize in the consolidated statement of income       718,356        
Effect of overlay approach reclassification [member] | Foreign Government securities [member] | Federal Government Treasury Bonds with CER 2.5% adjustment – Maturity 07/22/2021 [member] | August 2020 [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Fair value 5,057,400     5,057,400        
Income recognize in the consolidated statement of income       676,818        
Effect of overlay approach reclassification [member] | Foreign Government securities [member] | Federal Government Treasury Bonds In Pesos Adjusted By CER One Percent 2021 [Member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Fair value $ 8,601,844     8,601,844        
Percentage of reclassified portfolio 50.00%              
Profit / (loss) for the fiscal year from financial instruments at fair value through OCI $ 27,577              
Effect of overlay approach reclassification [member] | Local Government Securities [member] | nation treasury bills in pesos maturity 01/29/2021 [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Fair value 22,625,105     $ 22,625,105        
Borrowings, maturity       01/29/2021        
Effect of overlay approach reclassification [member] | Local Government Securities [member] | National treasury bills at discount in pesos maturity 02/06/2021 [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Fair value $ 13,629,800     $ 13,629,800        
Borrowings, maturity       02/06/2021        
Minimum Average Term [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Percentage of participating interest       50.00%        
Sud Asesores [member]                
Basis for preparation of financial statements and applicable accounting standards [line items]                
Percentage of voting equity interests acquired 100.00%     100.00%        
Equity interests of acquirer $ 20,453     $ 20,453