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Related party disclosures (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Related party disclosures [Line Items] |  |
Current receivables due from related parties | $ 59,132 | $ 82,259
Charlee SQM Thailand Co. Ltd. [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Associate | Associate
Country of origin | Thailand | Thailand
Currency | Thai baht | Thai baht
Current receivables due from related parties | $ 1,204 | $ 1,315
Ajay Europe SARL [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Associate | Associate
Country of origin | France | France
Currency | Euro | Euro
Current receivables due from related parties | $ 4,689 | $ 3,801
Ajay North America LLC. [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign |
Nature | Associate |
Country of origin | United States |
Currency | US$ |
Current receivables due from related parties | $ 2,005 | $ 3,095
Abu Dhabi Fertilizer Industries WWL [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Associate | Associate
Country of origin | United Arab Emirates | Arab Emirates
Currency | Arab Emirates dirham | Arab Emirates dirham
Current receivables due from related parties | $ 73 | $ 764
Kowa Company Ltd. [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Joint control | Joint control
Country of origin | Japan | Japan
Currency | US$ | US$
Current receivables due from related parties | $ 5,008 | $ 34,377
Soc.de Inversiones Pampa Calichera [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | 96,511,530-7 |
Nature | Jointly controlled entity |
Country of origin | Chile |
Currency | US$ |
Current receivables due from related parties | $ 6 | $ 6
SQM Vitas Brazil Agroindustria [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Other related parties | Other related parties
Country of origin | Brazil | Brazil
Currency | US$ | US$
Current receivables due from related parties | $ 17,293 | $ 9,580
SQM Vitas Peru S.A.C. [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Other related parties | Other related parties
Country of origin | Peru | Peru
Currency | US$ | US$
Current receivables due from related parties | $ 13,766 | $ 13,318
Coromandel SQM India [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Joint venture | Joint venture
Country of origin | India | India
Currency | Indian rupee | Indian rupee
Current receivables due from related parties | $ 3,804 | $ 1,177
Sichuan SQM Migao Chemical Fertilizers Co Ltda. [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Joint venture | Joint venture
Country of origin | China | China
Currency | US$ | US$
Current receivables due from related parties | $ 0 | $ 14,547
Callegari Agricola S.A. [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | 79.049.778-9 | 79,049,778-9
Nature | Other related parties | Other related parties
Country of origin | Chile | Chile
Currency | Chilean peso | Chilean peso
Current receivables due from related parties | $ 0 | $ 41
SQM Vitas Fzco. [Member] |  |
Related party disclosures [Line Items] |  |
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 receivables due from related parties | $ 0 | $ 97
SQM Vitas Plantacote B.V [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Other related parties | Other related parties
Country of origin | Netherlands | Dutch Antilles
Currency | Euro | Euro
Current receivables due from related parties | $ 0 | $ 91
SQM Star Qingdao Corp Nutrition Co., Ltd. [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Joint venture | Joint venture
Country of origin | China | China
Currency | US$ | US$
Current receivables due from related parties | $ 50 | $ 48
Plantacote N.V [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreing | Foreign
Nature | Other related parties | Other related parties
Country of origin | Belgium | Belgium
Currency | Euro | Euro
Current receivables due from related parties | $ 190 | $ 2
Terra Tarsa Ukraine LLC [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Other related parties | Other related parties
Country of origin | Turkey | Ukraine
Currency | Ukrainian Grivna | Ukrainian Grivna
Terra Tarsa Don LLC [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Other related parties | Other related parties
Country of origin | Russian Federation | Russian Federation
Currency | Russian ruble | Russian ruble
Current receivables due from related parties | $ 44 |
Minera Exar S.A. [Member] |  |
Related party disclosures [Line Items] |  |
Tax ID | Foreign | Foreign
Nature | Joint control | Joint control
Country of origin | Argentina | Argentina
Currency | US$ | US$
Current receivables due from related parties | $ 11,000 | $ 0

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