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Interest-bearing loans and borrowings (Details Narrative) S/ in Thousands, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Feb. 01, 2013 USD ($) | Feb. 01, 2013 PEN (S/) | Dec. 31, 2017 PEN (S/) | Dec. 31, 2016 PEN (S/) | Dec. 31, 2015 PEN (S/)
Disclosure of detailed information about borrowings [line items] |  |  |  |  |
Accrued interest | S/ |  |  | S/ 45,358 | S/ 44,729 | S/ 8,108
Senior Notes [Member] |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |
Total net proceeds from borowing | S/ |  | S/ 762,067 |  |  |
Senior Notes [Member] | USD |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |
Face amount | $ | $ 300,000 |  |  |  |
Total net proceeds from borowing | $ | $ 293,646 |  |  |  |

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