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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 |  |  |  |

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