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FINANCIAL RISK MANAGEMENT (Details 10) - Consolidated VaR by type of asset [Member] - PEN (S/)
S/ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of Consolidated VaR by Type Of Asset [Line Items]    
Value at risk S/ 10,416 S/ 7,400
Interest Rate Risk [Member]    
Disclosure Of Consolidated VaR by Type Of Asset [Line Items]    
Value at risk 9,527 7,836
Price risk [member]    
Disclosure Of Consolidated VaR by Type Of Asset [Line Items]    
Value at risk 4,476 2,759
Volatility Risk [Member]    
Disclosure Of Consolidated VaR by Type Of Asset [Line Items]    
Value at risk 0 0
Diversification effect [member]    
Disclosure Of Consolidated VaR by Type Of Asset [Line Items]    
Value at risk S/ (3,587) S/ (3,195)