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Shareholders’ equity, net (Details 1) S/ in Thousands, $ in Thousands | Dec. 31, 2017 USD ($) shares | Dec. 31, 2017 PEN (S/) shares | Dec. 31, 2016 USD ($)
--- | --- | --- | ---
Disclosure of Shareholders’ equity, net [Line Items] |  |  |
Other equity interest | $ | $ 791 |  | $ 791
Total investment shares [Member] |  |  |
Disclosure of Shareholders’ equity, net [Line Items] |  |  |
Number of shares outstanding | 271,677 | 271,677 |
Other equity interest | $ 791 | S/ 2,717 |
Other equity interest [member] | investment shares [Member] |  |  |
Disclosure of Shareholders’ equity, net [Line Items] |  |  |
Number of shares outstanding | 744,640 | 744,640 |
Other equity interest | $ 2,161 | S/ 7,447 |
Other equity interest [member] | Treasury investment shares [Member] |  |  |
Disclosure of Shareholders’ equity, net [Line Items] |  |  |
Number of shares outstanding | (472,963) | (472,963) |
Other equity interest | $ (1,370) | S/ (4,730) |

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