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Provisions - Summary of Changes in Provisions (Detail) - ARS ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of other provisions [line items] |  |
Amounts at beginning of fiscal year | $ 2,006,052 | $ 2,212,835
Increases | 1,138,280 | 1,809,892
Decreases Reversals | 8 | 36,725
Decreases Charge Off | 1,269,731 | 1,152,685
Monetary effects | (564,076) | (827,265)
Amounts at the end of fiscal year | 1,310,517 | 2,006,052
For administrative, disciplinary and criminal penalties [member] |  |
Disclosure of other provisions [line items] |  |
Amounts at beginning of fiscal year | 977 | 1,503
Monetary effects | (259) | (526)
Amounts at the end of fiscal year | 718 | 977
Letter of credit, guarantee and other commitments [member] |  |
Disclosure of other provisions [line items] |  |
Amounts at beginning of fiscal year | 23,514 | 22,472
Increases | 16,268 | 10,981
Decreases Charge Off | 8,623 |
Monetary effects | (7,959) | (9,939)
Amounts at the end of fiscal year | 23,200 | 23,514
Commercial claims in progress [member] |  |
Disclosure of other provisions [line items] |  |
Amounts at beginning of fiscal year | 1,142,840 | 1,196,640
Increases | 200,844 | 423,531
Decreases Reversals | 8 |
Decreases Charge Off | 349,776 | 19,742
Monetary effects | (304,783) | (457,589)
Amounts at the end of fiscal year | 689,117 | 1,142,840
Legal proceedings provision [member] |  |
Disclosure of other provisions [line items] |  |
Amounts at beginning of fiscal year | 241,424 | 230,566
Increases | 107,345 | 179,678
Decreases Charge Off | 52,998 | 61,518
Monetary effects | (68,020) | (107,302)
Amounts at the end of fiscal year | 227,751 | 241,424
Pension Funds - Reimbursement [member] |  |
Disclosure of other provisions [line items] |  |
Amounts at beginning of fiscal year | 217,622 | 260,269
Increases | 15,596 | 163,619
Decreases Reversals |  | 36,725
Decreases Charge Off | 105,239 | 75,717
Monetary effects | (39,128) | (93,824)
Amounts at the end of fiscal year | 88,851 | 217,622
Miscellaneous other provisions [member] |  |
Disclosure of other provisions [line items] |  |
Amounts at beginning of fiscal year | 379,675 | 501,385
Increases | 798,227 | 1,032,083
Decreases Charge Off | 753,095 | 995,708
Monetary effects | (143,927) | (158,085)
Amounts at the end of fiscal year | $ 280,880 | $ 379,675

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