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Investments in Associates and Joint Arrangements - Summarized Financial Information on the Bank's Investment in Associate (Detail) - ARS ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of associates [line items] |  |  |  |
Total assets | $ 999,299,463 | $ 1,169,086,869 |  |
Total liabilities | 759,662,018 | 940,341,140 |  |
Shareholders' equity | 239,637,445 | 228,745,729 | $ 217,948,890 | $ 192,542,610
Associates [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Total assets | 88,898 | 88,980 |  |
Total liabilities | 12,608 | 18,332 |  |
Shareholders' equity | $ 76,290 | $ 70,648 |  |
Proportional Bank's interest | 5.00% | 5.00% |  |
Investment carrying amount | $ 3,815 | $ 3,532 |  |
Play Digital SA [Member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Total assets | 1,863,801 | 996,013 |  |
Total liabilities | 157,398 | 132,254 |  |
Shareholders' equity | $ 1,706,403 | $ 863,759 |  |
Proportional Bank's interest | 10.0197% | 9.9545% |  |
Investment carrying amount | $ 170,976 | $ 85,983 |  |

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