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Joint Ventures (Details Textual) $ in Thousands, € in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 15, 2018 EUR (€) | Dec. 01, 2017 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) MT | Apr. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Feb. 14, 2018 USD ($) | Jan. 25, 2018 USD ($) | Oct. 06, 2017 USD ($)
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired | 50.00% | 50.00% |  |  |  | 50.00% |  |  |  |  |
Other cash payments to acquire interests in joint ventures, classified as investing activities |  |  |  | $ 2,600 | $ 19,989 | $ 38,088 |  |  |  |  |
Capital contributions made by related entities |  |  |  |  |  |  |  |  |  |  | $ 13,300
Volume of lithium metallic equivalent authorised to process and sell | MT |  |  |  |  |  | 45,000 |  |  |  |  |
Contingent Consideration Initial Payment |  |  |  |  |  | $ 15,000 |  |  |  |  |
Payments Of Deferrred Contingent Consideration |  |  |  |  |  | 30,000 |  |  |  |  |
Amounts recognised for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination |  |  |  |  |  | 10,000 |  |  |  |  |
Contingent Consideration Deferred Payment |  |  |  |  |  | 55,000 |  |  |  |  |
Proportion of voting rights held in joint venture |  |  |  | 50.00% |  |  |  |  |  |  |
Dividends received |  |  |  | $ 3,851 | 10,612 | 2,091 |  |  |  |  |
Minera Exar S.A. [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  |  |  |  |  |  |  |  | 50.00%
Other cash payments to acquire interests in joint ventures, classified as investing activities |  | $ 6,205 |  |  |  |  |  |  |  |  |
Gain (loss) that relates to identifiable assets acquired or liabilities assumed in business combination and is of such size, nature or incidence that disclosure is relevant to understanding combined entity's financial statements |  |  |  |  | 14,507 |  |  |  |  |  |
Capital contributions made by related entities |  |  |  |  |  |  | $ 7,000 | $ 13,000 |  |  |
SQM Potasio S.A. [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment loss |  |  |  |  | 8,802 |  |  |  |  |  |
Joint venture contributions |  |  |  |  |  |  |  |  |  | $ 6,000 |
Pavoni C Spa [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Acquisitions through business combinations, intangible assets and goodwill |  |  |  |  | 3,206 |  |  |  |  |  |
Other cash payments to acquire interests in joint ventures, classified as investing activities | € | € 2.6 |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  | 0 | 0 | 0 |  |  |  |  |
SQM Australia Pty [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consideration transferred, acquisition-date fair value |  |  |  |  |  | 70,000 |  |  |  |  |
Soquimich European Holding B.V. [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Other cash payments to acquire interests in joint ventures, classified as investing activities | € | € 5.5 |  |  |  |  |  |  |  |  |  |
Lithium Americas Corporation [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Joint venture contributions |  |  |  |  |  |  |  |  | $ 7,000 |  |
SQM Vitas Fzco. [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  | $ 21,196 | $ 10,598 | $ 0 | $ 0 |  |  |  |  |

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