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Fair Values Of Financial Instruments - Assets And Liabilities Measured At Fair Value (Details) - ARS ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Financial Assets Abstract |  |
Debt Securities FVTPL | $ 4,129,970 | $ 11,549,889
Derivative Financial Assets FVTPL | 3,047,036 | 909,793
Equity Instruments FVTPL | 4,152,821 | 812,275
Debt Securities FVOCI | 45,178,513 | 37,765,909
Equity Instruments FVOCI | 27,369 | 21,423
Financial Liabilities Abstract |  |
Trading Liabilities FVTPL | 580,802 | 1,064,936
Derivative Financial Liabilities FVTPL | 3,072,947 | 2,118,671
Accounting Balance Member |  |
Financial Assets Abstract |  |
Debt Securities FVTPL | 4,129,970 | 11,549,889
Derivative Financial Assets FVTPL | 3,047,036 | 909,793
Equity Instruments FVTPL | 4,152,821 | 812,275
Debt Securities FVOCI | 45,178,513 | 37,765,909
Equity Instruments FVOCI | 27,369 | 21,423
Total | 56,535,709 | 51,059,289
Financial Liabilities Abstract |  |
Trading Liabilities FVTPL | 580,802 | 1,064,936
Derivative Financial Liabilities FVTPL | 3,072,947 | 2,118,671
Total | 3,653,749 | 3,183,607
Total Fair Value Member |  |
Financial Assets Abstract |  |
Debt Securities FVTPL | 4,129,970 | 11,549,889
Derivative Financial Assets FVTPL | 3,047,036 | 909,793
Equity Instruments FVTPL | 4,152,821 | 812,275
Debt Securities FVOCI | 45,178,513 | 37,765,909
Equity Instruments FVOCI | 27,369 | 21,423
Total | 56,535,709 | 51,059,289
Financial Liabilities Abstract |  |
Trading Liabilities FVTPL | 580,802 | 1,064,936
Derivative Financial Liabilities FVTPL | 3,072,947 | 2,118,671
Total | 3,653,749 | 3,183,607
Level 1 - Fair Value Member |  |
Financial Assets Abstract |  |
Debt Securities FVTPL | 0 | 83,086
Derivative Financial Assets FVTPL | 0 | 0
Equity Instruments FVTPL | 1,119,811 | 812,275
Debt Securities FVOCI | 1,225,033 | 154,088
Equity Instruments FVOCI | 0 | 20,346
Total | 2,344,844 | 1,069,795
Financial Liabilities Abstract |  |
Trading Liabilities FVTPL | 580,802 | 250,279
Derivative Financial Liabilities FVTPL | 0 | 0
Total | 580,802 | 250,279
Level 2 - Fair Value Member |  |
Financial Assets Abstract |  |
Debt Securities FVTPL | 4,129,970 | 11,466,803
Derivative Financial Assets FVTPL | 2,362,036 | 909,793
Equity Instruments FVTPL | 0 | 0
Debt Securities FVOCI | 43,953,480 | 37,611,821
Equity Instruments FVOCI | 27,369 | 1,077
Total | 50,472,855 | 49,989,494
Financial Liabilities Abstract |  |
Trading Liabilities FVTPL | 0 | 814,657
Derivative Financial Liabilities FVTPL | 3,072,947 | 2,118,671
Total | 3,072,947 | $ 2,933,328
Level 3 - Fair Value Member |  |
Financial Assets Abstract |  |
Debt Securities FVTPL | 0 |
Derivative Financial Assets FVTPL | 685,000 |
Equity Instruments FVTPL | 3,033,010 |
Debt Securities FVOCI | 0 |
Equity Instruments FVOCI | 0 |
Total | 3,718,010 |
Financial Liabilities Abstract |  |
Trading Liabilities FVTPL | 0 |
Derivative Financial Liabilities FVTPL | 0 |
Total | $ 0 |

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