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Assets held for sale (Tables) | 12 Months Ended
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Dec. 31, 2018
Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] |
Disclosure of detailed information about available for sale noncurrent assets [Text Block] | The following table shows the movements in assets held for sale:
Assets held for sale |  | 12/31/2018 |  |  | 12/31/2017 |
|  | ThUS$ |  |  | ThUS$ |
Terrenos Soquimich Comercial S.A. |  |  | 1,430 |  |  |  | 1,480 |
Facilities and fixtures at Soquimich Comercial S.A. |  |  | - |  |  |  | 109 |
Total assets held for sale |  |  | 1,430 |  |  |  | 1,589 |
Disclosure of detailed information about cash flow related to investments in associates and joint ventures were sold |
Financial Performace and Cash Flow information |  | Minera Exar S.A. |  |  | Charlee SQM Thailand Co. Ltd. |  |  | Total 12/31/2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Share in the profits (losses) of associates and joint ventures accounted for using the equity method |  |  | (206 | ) |  |  | 316 |  |  |  | 110 |
Income before tax |  |  | (206 | ) |  |  | 316 |  |  |  | 110 |
Cash detail from Sale of Investments |  |  |  |  |  |  |  |  |  |  |  |
Net cash generated from operating activities |  |  | 13,232 |  |  |  | - |  |  |  | 13,232 |
Net cash generated from investment activities |  |  | 68,000 |  |  |  | 988 |  |  |  | 68,988 |
Net increase in cash generated by sales of investments |  |  | 81,232 |  |  |  | 988 |  |  |  | 82,220 |
Disclosure of detailed information about sale of investments in associates and joint venture | Determination of profit from sale of investments
Details of the sale of investments in associates and joint ventures |  | Minera Exar S.A. |  |  | Charlee SQM Thailand Co. Ltd. |  |  | Total 12/31/2018 |
Considerations received or to be received |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Cash |  |  | 87,500 |  |  |  | 988 |  |  |  | 88,488 |
Commercial debts and other accounts payable |  |  | - |  |  |  | 1,022 |  |  |  | 1,022 |
Total consideration for the provision Book value of net assets sold |  |  | (67,635 | ) |  |  | (2,343 | ) |  |  | (69,978 | )
Gain on the sale before the income tax and reclassification of the foreign currency conversion |  |  | 19,865 |  |  |  | (333 | ) |  |  | 19,532 |
Reclassification of the foreign currency conversion reserve |  |  | (5,358 | ) |  |  | (426 | ) |  |  | (5,784 | )
Income tax expense on income derived from gains |  |  | (6,268 | ) |  |  | - |  |  |  | (6,268 | )
Profit after tax |  |  | 8,239 |  |  |  | (759 | ) |  |  | 7,480 |
Disclosure of detailed information about book value of the assets and liabilities of associates and subsidiaries sold | The book value of the assets and liabilities on the date of sale were:
Items |  | Minera Exar S.A. |  |  | Charlee SQM Thailand Co. Ltd. |  |  | Total 12/31/2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Accounts receivable from current related entities |  |  | (19,500 | ) |  |  | - |  |  |  | (19,500 | )
Investments accounted for using the equity method |  |  | (35,628 | ) |  |  | (2,343 | ) |  |  | (37,971 | )
Capital Gains |  |  | (6,205 | ) |  |  | - |  |  |  | (6,205 | )
Property, Plant and Equipment |  |  | (6,302 | ) |  |  | - |  |  |  | (6,302 | )
Total Assets |  |  | (67,635 | ) |  |  | (2,343 | ) |  |  | (69,978 | )
Total liabilities |  |  | - |  |  |  | - |  |  |  | - |
Net assets |  |  | (67,635 | ) |  |  | (2,343 | ) |  |  | (69,978 | )

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