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Joint Ventures (Details Textual) $ in Thousands, € in Millions |  | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 15, 2018 EUR (€) | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Apr. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Feb. 14, 2018 USD ($) | Jan. 25, 2018 USD ($)
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  | 50.00% |  |  |  |  |  |  |  |  |
Other cash payments to acquire interests in joint ventures, classified as investing activities |  |  |  |  | $ 16,949 | $ 2,600 | $ 19,989 |  |  |  |
Proportion of voting rights held in joint venture |  |  |  |  |  | 50.00% |  |  |  |  |
Dividends received |  |  |  |  | 3,164 | $ 3,851 | 10,612 |  |  |  |
Gain loss on disposal of investments in joint ventures |  |  |  | $ 643 |  |  |  |  |  |  |
Netherlands | SQM [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage of voting equity interests acquired |  |  |  | 100.00% |  |  |  |  |  |  |
Dividends received |  |  |  | $ 1,276 |  |  |  |  |  |  |
Minera Exar S.A. [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |
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 |
Arpa Speciali SRL [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends received | [1] |  |  |  | 0 | 0 | 0 |  |  |  |
Disposal of interests in joint ventures consideration receivable |  |  |  | 56 |  |  |  |  |  |  |
Gain loss on disposal of investments in joint ventures |  |  |  | 125 |  |  |  |  |  |  |
Proceeds from disposal of interests in joint ventures |  |  |  | 17 |  |  |  |  |  |  |
Arpa Speciali SRL [Member] | Other Accounts Receivable [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Disposal of interest in joint ventures balance consideration receivable current |  |  |  | 20 |  |  |  |  |  |  |
Disposal of interest in joint ventures balance consideration receivable non current |  |  |  | 20 |  |  |  |  |  |  |
Coromandel SQM India [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  | 0 | 0 | 0 |  |  |  |
Proceeds from disposal of interests in joint ventures |  |  |  | $ 1,505 |  |  |  |  |  |  |
SQM Star Qingdao Corp Nutrition Co., Ltd. [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  | 0 | $ 0 | $ 0 |  |  |  |
Gain loss on disposal of investments in joint ventures |  |  | $ 62 |  |  |  |  |  |  |  |
Proceeds from disposal of interests in joint ventures |  |  | 1,303 |  |  |  |  |  |  |  |
Sichuan SQM Migao Chemical Fertilizers Co Ltd [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Reversal of impairment losses on investment in associates |  |  | 7,036 |  |  |  |  |  |  |  |
Kidmann Resourcs Westmen And Mt Holland [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contribution towards projects in joint operations |  |  | 30,000 |  |  |  |  |  |  |  |
Wesment Farmers Limited [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Contribution towards projects in joint operations |  |  | $ 15,000 |  |  |  |  |  |  |  |
Mt Holland [Member] |  |  |  |  |  |  |  |  |  |  |
Statement [Line Items] |  |  |  |  |  |  |  |  |  |  |
Finance activities for the year |  |  |  |  | $ 30,000 |  |  |  |  |  |
[1] | Pavoni & C. Spa.

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