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Segment information (Details Narrative) - PEN (S/) S/ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of major customers [line items] |  |  |
Revenue | S/ 1,225,639 | S/ 1,240,169 | S/ 1,231,015
Capital expenditures | 69,732 | 117,801 | 490,807
Total financial instruments at fair value | 21,206 | 657 | 436
Derivative financial instruments | 489 | 69,912 | 124,770
Quicklime [Member] |  |  |
Disclosure of major customers [line items] |  |  |
Revenue | 80,707 | 75,090 | 64,140
Capital expenditures |  |  |
Quicklime [Member] | Two Customers [Member] |  |  |
Disclosure of major customers [line items] |  |  |
Revenue | S/ 65,784 |  |
Quicklime [Member] | One Customer [Member] |  |  |
Disclosure of major customers [line items] |  |  |
Revenue |  | S/ 55,657 | S/ 27,182

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