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Note 40 - Financial Instruments Risks - Concentration of Deposits (Details) - ARS ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2017
Largest 10 Customers Member |  |  |  |
Concentration of Deposits Line Items |  |  |  |
Concentration of Deposits Debt Balance | $ 15,293,060 | $ 8,292,309 |  | $ 7,458,824
Percent of Over Total Portfolio | 5.89% | 3.65% | 3.53% |
Following 50 Largest Customers Member |  |  |  |
Concentration of Deposits Line Items |  |  |  |
Concentration of Deposits Debt Balance | $ 15,553,822 | $ 12,694,213 |  | 11,983,068
Percent of Over Total Portfolio | 5.99% | 5.59% | 5.67% |
Following 100 Largest Customers Member |  |  |  |
Concentration of Deposits Line Items |  |  |  |
Concentration of Deposits Debt Balance | $ 10,544,960 | $ 9,108,019 |  | 8,306,965
Percent of Over Total Portfolio | 4.06% | 4.01% | 3.93% |
Rest of Customers Member |  |  |  |
Concentration of Deposits Line Items |  |  |  |
Concentration of Deposits Debt Balance | $ 218,117,219 | $ 197,183,213 |  | 183,426,573
Percent of Over Total Portfolio | 84.06% | 86.75% | 86.87% |
Total of Concentration of Deposits Member |  |  |  |
Concentration of Deposits Line Items |  |  |  |
Concentration of Deposits Debt Balance | $ 259,509,061 | $ 227,277,754 |  | $ 211,175,430
Percent of Over Total Portfolio | 100.00% | 100.00% | 100.00% |

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