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Effect of fluctuations in foreign currency exchange rates (Details 1) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | $ (11,569) | $ (25,745) | $ (26,307)
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 | (9) | (9) | (17)
Proinsa Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (10) | (10) | (11)
Comercial Agrorama Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (19) | 33 | (21)
Isapre Norte Grande Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (14) | (44) | (1)
Almacenes y Depositos Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 211 | 142 | 113
Sacal S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (3) | (3) | (3)
Sociedad Prestadora de Servicios de Salud Cruz del Norte S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (13) | (19) | (10)
Agrorama S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 92 | 231 | 132
Doktor Tarsa Tarim Sanayi AS [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | (13,811) | (13,811)
SQM Vitas Fzco. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (3,736) | (2,267) | (2,682)
Ajay Europe [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (693) | (1,449) | (1,270)
SQM Eastmed Turkey [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | (155) | (113)
Doctochem Tarim Sanayi LTD [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | 7 | 0
Coromandel SQM India [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | (431) | (393)
SQM Italia SRL [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | (236) | (213)
SQM Oceania Pty Limited [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (579) | (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 | 372 | 372 | (435)
SQM Vitas BV [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 99 | (197) | (170)
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) | (1,983) | (1,983)
SQM Australia Pty Ltd [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (4,052) | (4,035) | (4,222)
Pavoni C Spa [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 164 | (185) | 70
Terra Tarsa B.V.. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | 116 | (82)
Plantacote N.V [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | (16) | (34)
Doktolab Tarim Arastima San [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | (54) | (29)
Kore Potash PLC [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (1,128) | (1,754) | (1,206)
SQM Colombia SAS [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | $ (80) | $ (166) | $ (94)

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