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Related party disclosures(Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Related party disclosures [Line Items] |  |
Current payables to related parties | $ 1,365 | $ 7
Doktor Tarsa Tarim Sanayi AS [Member] |  |
Related party disclosures [Line Items] |  |
Description Of Tax ID | Foreign | Foreign
Nature | Associate | Associate
Country of origin | Turkey | Turkey
Currency | Turkish lira | Turkish lira
Current payables to related parties | $ 11 | $ 7
Sichuan SQM Migao Chemical Fertilizers Co Ltda. [Member] |  |
Related party disclosures [Line Items] |  |
Description Of Tax ID | Foreign | Foreign
Nature | Joint venture | Joint venture
Country of origin | China | China
Currency | US$ | US$
Current payables to related parties | $ 7 | $ 0
Terra Tarsa Ukraine LLC [Member] |  |
Related party disclosures [Line Items] |  |
Description Of Tax ID | Foreign | Foreign
Nature | Other related parties | Other related parties
Country of origin | Turkey | Ukraine
Currency | Ukrainian Grivna | Ukrainian Grivna
Current payables to related parties | $ 725 | $ 0
SQM Star Qingdao Corp Nutrition Co., Ltd. [Member] |  |
Related party disclosures [Line Items] |  |
Description Of Tax ID | Foreign | Foreign
Nature | Joint venture | Joint venture
Country of origin | China | China
Currency | US$ | US$
Current payables to related parties | $ 584 | $ 0
SQM Vitas Fzco. [Member] |  |
Related party disclosures [Line Items] |  |
Description Of Tax ID | Foreign | Foreign
Nature | Joint venture | Joint venture
Country of origin | United Arab Emirates | Arab Emirates
Currency | Arab Emirates dirham | Arab Emirates dirham
Current payables to related parties | $ 38 | $ 0

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