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Corporate information (Details 1) - PEN (S/) S/ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of subsidiaries [line items] |  |  |  |
Cost of sales |  | S/ (732,956) | S/ (736,530) | S/ (695,757)
Finance income |  | 5,842 | 3,240 | 3,416
(Loss) gain from exchange difference, net |  | (2,226) | (2,541) | 12,194
Income tax |  | (551) | (6,399) | (3,141)
Loss for the year from discontinued operations |  | (754) | (6,589) | (5,720)
Fosfatos del Pacifico S.A. [Member] |  |  |  |
Disclosure of subsidiaries [line items] |  |  |  |
Sales | S/ 11 |  | 2,044 |
Cost of sales | (626) | (626) | (6,881) |
Administrative expenses | (660) |  | (6,352) | (8,868)
Other income (expense) | 153 | S/ 153 | (1,006) | (212)
Finance income | 2 |  | 11 | 62
(Loss) gain from exchange difference, net | (185) |  | (804) | 157
Loss from discontinued operations before income tax | (1,305) |  | (12,988) | (8,861)
Income tax | 551 |  | 6,399 | 3,141
Loss for the year from discontinued operations | S/ (754) |  | S/ (6,589) | S/ (5,720)

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- Definition The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_99&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_103&doctype=Standard -URIDate 2017-03-09 + Details
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