TRANSACTIONS WITH RELATED PARTIES - Additional Information (Details) - PEN (S/) S/ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Disclosure Of Related Party Explanatory [Line Items] | ||
| Allowance for doubtful debts related to outstanding balances of related party transaction | S/ 12,600 | S/ 13,700 |
| Amounts receivable, related party transactions | S/ 1,657,206 | S/ 2,594,712 |
| Related parties [member] | ||
| Disclosure Of Related Party Explanatory [Line Items] | ||
| Borrowings, maturity | had maturities between January 2020 and December 2029 | maturities where between January 2019 and December 2028 |
| Borrowings, interest rate | 6.21% | 6.46% |
| Employees, directors, key management and family [Member] | ||
| Disclosure Of Related Party Explanatory [Line Items] | ||
| Amounts receivable, related party transactions | S/ 1,003,200 | S/ 1,031,700 |