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DEPOSITS AND OBLIGATIONS - Additional information (Details) - Fondo de Seguro de Depositos [Member] - PEN (S/)
S/ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure of Deposits and Obligations [Line Items]    
Balance Of Deposits And Obligations S/ 35,511,900 S/ 33,571,800
Maximum Coverage Recognized S/ 100,661 S/ 100,864