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SUBSEQUENT EVENT (Details Textual) - PEN (S/)
S/ in Thousands
1 Months Ended 12 Months Ended
Apr. 18, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Subsequent Event [Line Items]        
Payments from changes in ownership interests in subsidiaries that do not result in loss of control   S/ 0 S/ 489,866 S/ 0
Subsequent Events [Member] | Mibanco [Member]        
Subsequent Event [Line Items]        
Proportion of ownership interest in subsidiary 93.66%      
Proportion of ownership interests held by non-controlling interests 4.99%      
Proportion of ownership interests acquired in subsidiary previously held by non-controlling interests 3.23%      
Proportion of ownership interests acquired previously held by non-controlling interests 0.06%      
Payments from changes in ownership interests in subsidiaries that do not result in loss of control S/ 129,000      
Payments of other equity instruments S/ 2,400