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Effect of fluctuations in foreign currency exchange rates (Details 1) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | $ (25,745) | $ (26,307) | $ (24,913)
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) | (17) | (2)
Proinsa Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (10) | (11) | (7)
Comercial Agrorama Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 33 | (21) | (44)
Isapre Norte Grande Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (44) | (1) | (74)
Almacenes y Depositos Ltda. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 142 | 113 | 97
Sacal S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (3) | (3) | 0
Sociedad Prestadora de Servicios de Salud Cruz del Norte S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (19) | (10) | 0
Agrorama S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 231 | 132 | (98)
Doktor Tarsa Tarim Sanayi AS [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (13,811) | (13,811) | (14,447)
SQM Vitas Fzco. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (2,267) | (2,682) | (1,779)
Ajay Europe S.A.R.L [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (1,449) | (1,270) |
SQM Eastmed Turkey [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (155) | (113) | (92)
Doctochem Tarim Sanayi LTD [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 7 | 0 | 0
Coromandel SQM India [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (431) | (393) | (234)
SQM Italia SRL [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (236) | (213) | (154)
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 | 372 | (435) | (435)
SQM Vitas Holland [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (197) | (170) | (101)
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) | (1,550)
SQM Australia Pty Ltd [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (4,035) | (4,222) | 154
Pavoni C Spa [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (185) | 70 | 0
Terra Tarsa B.V.. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 116 | (82) | 0
Plantacote N.V [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (16) | (34) | 0
Doktolab Tarim Arastima San [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (54) | (29) | 0
Kore Potash PLC [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (1,754) | (1,206) | 0
SQM Colombia SAS [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | (166) | (94) | 0
Minera Exar S.A. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | 0 | (5,209)
Charlee SQM Thailand Co. Ltd. [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | 0 | 0 | (285)
Ajay Europe SARL [Member] |  |  |
Other reserves [abstract] |  |  |
Reserve of exchange differences on translation | $ 0 | $ 0 | $ (831)

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