NET PREMIUMS EARNED - Insurance premiums (Details) - PEN (S/)
S/ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Gross written premiums [1] S/ 3,631,880 S/ 3,391,089 S/ 2,937,407
Technical reserve adjustment (747,035) (748,142) (629,264)
Total gross written premiums [1] 2,884,845 2,642,947 2,308,143
Premiums ceded to reinsurers and co-insurers, net [2] 559,160 497,646 499,803
Results of financial assets designated at fair value through profit and loss 93,664 (53,935) 67,633
Total Net premiums earned 2,419,349 2,091,366 1,875,973
Health insurance [Member]      
Gross written premiums [1] 571,006 554,517 502,148
Technical reserve adjustment (22,843) (18,383) (5,147)
Total gross written premiums [1] 548,163 536,134 497,001
Premiums ceded to reinsurers and co-insurers, net [2] 12,828 10,257 15,294
Total Net premiums earned 535,335 525,877 481,707
Life insurance contracts [member]      
Gross written premiums [1] 1,984,279 1,821,867 1,498,943
Technical reserve adjustment (738,421) (677,708) (611,621)
Total gross written premiums [1] 1,245,858 1,144,159 887,322
Premiums ceded to reinsurers and co-insurers, net [2] 119,310 116,043 106,652
Results of financial assets designated at fair value through profit and loss 93,664 (53,935) 67,633
Total Net premiums earned 1,220,212 974,181 848,303
General Insurance [Member]      
Gross written premiums [1] 1,076,595 1,014,705 936,316
Technical reserve adjustment 14,229 (52,051) (12,496)
Total gross written premiums [1] 1,090,824 962,654 923,820
Premiums ceded to reinsurers and co-insurers, net [2] 427,022 371,346 377,857
Total Net premiums earned S/ 663,802 S/ 591,308 S/ 545,963
[1] This item includes earned premiums, reinsurance premiums accepted and coinsurance premiums accepted and received.
[2] “Premiums ceded to reinsurers and coinsurers, net” include: