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Reconciliation of liabilities arising from financing activities
S/ in Thousands
12 Months Ended
Dec. 31, 2017
PEN (S/)
Subordinated bonds [Member]  
Disclosure of reconciliation of liabilities arising from financing activities [line items]  
At January 1, 2017 S/ 5,498,009
New issues 29,953
Amortization of principal (70,002)
Exchange difference (177,027)
Changes in fair value (39,137)
Others 5,593
At December 31, 2017 5,247,389
Subordinated bonds [Member] | Amortized Cost  
Disclosure of reconciliation of liabilities arising from financing activities [line items]  
At January 1, 2017 616,020
New issues 29,953
Amortization of principal (70,002)
Exchange difference (10,382)
Changes in fair value 0
Others (140)
At December 31, 2017 565,449
Subordinated bonds [Member] | Fair value  
Disclosure of reconciliation of liabilities arising from financing activities [line items]  
At January 1, 2017 4,881,989
New issues 0
Amortization of principal 0
Exchange difference (166,645)
Changes in fair value (39,137)
Others 5,733
At December 31, 2017 4,681,940
Hedge of fair value  
Disclosure of reconciliation of liabilities arising from financing activities [line items]  
At January 1, 2017 (77,508)
New issues 0
Amortization of principal 0
Exchange difference 2,512
Changes in fair value 39,250
Others 1,456
At December 31, 2017 S/ (34,290)