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Equity (Details Narrative) - PEN (S/) S/ / shares in Units, S/ in Thousands |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2016 | Mar. 31, 2017 | Jan. 31, 2017 | Oct. 31, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 13, 2017 | Mar. 01, 2017 | Dec. 13, 2016 | Sep. 30, 2016 | Aug. 02, 2016 | Jul. 31, 2016 | Feb. 29, 2016 | Feb. 02, 2016 | Sep. 25, 2015 | Jul. 14, 2015 | Jun. 04, 2015 | Dec. 31, 2014
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share capital authorized | 531,461,479 |  |  |  | 423,868,449 | 531,461,479 | 531,461,479 |  |  |  |  |  |  |  |  |  |  |  |
Total outstanding shares | 111,484,000 |  |  |  | 70,097,971 | 111,484,000 | 111,484,000 |  |  |  |  |  |  |  |  |  |  |  |
Number of investment shares acquired | 50,503,124 |  | 7,911,845 | 37,276,580 | 40,278,894 | 50,503,124 |  |  |  |  |  |  |  |  |  |  |  |  |
Value of investment shares acquired |  |  |  |  | S/ (34,216) |  | S/ (108,218) |  |  |  |  |  |  |  |  |  |  |  |
Additional paid-in capital | S/ 545,165 |  |  |  | S/ 432,779 | S/ 545,165 |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends paid per share |  |  |  |  | S/ 0.35000 | S/ 0.28500 | S/ 0.28000 |  |  |  |  |  |  |  |  |  |  |  |
Dividends payable | 5,070 |  |  |  | S/ 29,725 | S/ 5,070 |  |  |  |  |  |  |  |  |  |  |  |  | S/ 189
Capital contributions | S/ 531,461 |  |  |  | 423,868 | S/ 531,461 |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment on Brine Project [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional paid-in capital |  |  |  |  | (6,759) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment on Brine Project [Member] | Cementos Pacasmayo S.A.A. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional paid-in capital |  |  |  |  | S/ (6,759) |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lima Stock Exchange [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total outstanding shares | 419,977,479 |  |  |  | 353,770,478 | 419,977,479 | 419,977,479 |  |  |  |  |  |  |  |  |  |  |  |
Quimpac S.A. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contributions | S/ 473 |  |  |  | S/ 490 | S/ 473 | S/ 277 |  |  |  |  |  |  |  |  |  |  |  |
Quimpac S.A. [Member] | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold of brine project for capital commitment |  |  |  |  | 14,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
MCA Phosphates Pte. Ltd [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contributions | 4,015 |  |  |  |  | 4,015 | 28,198 |  |  |  |  |  |  |  |  |  |  |  |
Salmueras Sudamericanas S.A. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capital contributions |  |  |  |  |  |  |  | S/ 3,467 |  | S/ 783 |  |  |  |  | S/ 4,100 |  |  | S/ 2,400 |
Difference on capital contributions and interests acquired |  |  |  |  | 576 | S/ 556 | S/ 325 |  |  |  |  |  |  |  |  |  |  |  |
Salmueras Sudamericanas S.A. [Member] | Impairment on Brine Project [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional paid-in capital |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Salmueras Sudamericanas S.A. [Member] | USD |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold of brine project for capital commitment |  |  |  |  | S/ 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fosfatos del Pacifico S.A. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional paid-in capital |  |  |  |  |  |  |  |  | S/ 118,569 |  |  |  |  |  |  |  |  |  |
Capital contributions |  |  |  |  |  |  |  |  | S/ 107,593 |  | S/ 1,200 | S/ 13,384 | S/ 1,000 | S/ 23,216 |  | S/ 15,813 | S/ 78,178 |  |
Difference on capital contributions and interests acquired | S/ 7,745,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of investment shares acquired |  |  | 7,911,845 | 37,276,580 | 36,040,497 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of investment shares acquired |  |  | S/ 34,216 | S/ 108,248 | S/ 119,005,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares [Member] | Fosfatos del Pacifico S.A. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Value of investment shares acquired |  | S/ 23,459 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares [Member] | Fosfatos del Pacifico S.A. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of investment shares acquired |  | 9,148,373 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued for additional paid-in capital | 111,484,000 |  |  |  |  | 111,484,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Investment shares [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of classes of share capital [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued for additional paid-in capital | 928,000 |  |  |  |  | 928,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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