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Effect of fluctuations in foreign currency exchange rates (Details 1) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | $ (26,307) | $ (24,913) | $ (19,463)
Comercial Hydro S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 1,004 | 1,004 | 1,004
SQMC Internacional Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (17) | (2) | (13)
Proinsa Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (11) | (7) | (10)
Comercial Agrorama Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (21) | (44) | (69)
Isapre Norte Grande Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (1) | (74) | (124)
Almacenes y Depositos Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 113 | 97 | 47
Sacal S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (3) | 0 | (29)
Sociedad Prestadora de Servicios de Salud Cruz del Norte S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (10) | 0 | (6)
Agrorama S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 132 | (98) | (49)
Doktor Tarsa [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (13,811) | (14,447) | (12,264)
SQM Vitas Fzco. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (2,682) | (1,779) | (1,801)
Ajay Europe [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (1,270) | (831) | (1,935)
SQM Eastmed Turkey [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (113) | (92) | (95)
Charlee SQM Thailand Co. Ltd. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | (285) | (460)
Coromandel SQM India [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (393) | (234) | (282)
SQM Italia SRL [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (213) | (154) | (287)
SQM Oceania Pty Limited [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (634) | (634) | (634)
SQM Indonesia S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (124) | (124) | (124)
Abu Dhabi Fertilizers Industries WWL [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (435) | (435) | (434)
SQM Vitas Holland [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (170) | (101) | (280)
SQM Thailand Limited [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (68) | (68) | (68)
SQM Europe N.V. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (1,983) | (1,550) | (1,550)
Minera Exar S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | (5,209) | 0
SQM Australia Pty Ltd [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (4,222) | 154 | 0
Pavoni C Spa [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 70 | 0 | 0
Terra Tarsa B.V.. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (82) | 0 | 0
Plantacote N.V [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (34) | 0 | 0
Doktolab Tarim Arastima San [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (29) | 0 | 0
Kore Potash PLC [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (1,206) | 0 | 0
SQM Colombia SAS [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | $ (94) | $ 0 | $ 0

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