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Equity-accounted investees (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | $ 109,435 | $ 111,549 | $ 152,630
Share in profit (loss) of associates and joint ventures accounted for using the equity method | [1] | 0 | (206) | (27)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  |  |  | 13,030
Investments accounted for using equity method [member] |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | 85,092 | 75,976 |
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 8,402 | 5,081 | 13,004
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | (571) | (1,177) |
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 7,831 | 3,904 |
Abu Dhabi Fertilizer Industries WWL |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | 11,609 | 10,821 |
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 634 | 596 | 1,483
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 1 | 0 |
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 635 | 596 | 1,483
Doktor Tarsa Tarim Sanayi AS |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | 26,001 | 21,582 |
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 3,912 | 241 | 6,427
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 198 | 489 |
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 4,110 | 730 | 6,427
Ajay North America |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | 14,669 | 14,951 |
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 2,871 | 3,728 | 3,677
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 0 | 0 |
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 2,871 | 3,728 | 3,677
Ajay Europe SARL |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | 7,451 | 7,845 |
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 1,165 | 1,373 | 1,049
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | (179) | (439) |
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 986 | 934 | 1,075
Charlee SQM Thailand Co, Ltd, |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | 0 | 0 |
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 0 | 316 | 393
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 0 | 0 |
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 0 | 316 | 393
SQM Eastmed Turkey, |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | 623 | 310 |
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 354 | 370 | (25)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | (42) | (21) |
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 312 | 349 | (25)
Kore Potash Ltd |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | 24,739 | 20,467 |
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | (534) | (1,543) | 0
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | (549) | (1,206) |
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | $ (1,083) | $ (2,749) | $ 0
[1] | Minera Exar S.A. was sold in December 2018.

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- Definition The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 24 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_24_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B16&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_e&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The entity's share of the other comprehensive income of associates and joint ventures accounted for using the equity method, net of tax. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2019-01-01 -Paragraph 39M -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2019-en-b&anchor=para_39M_b&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B16 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B16_c&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_a&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The entity's share of the other comprehensive income of associates and joint ventures accounted for using the equity method, before tax. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2019-01-01 -Paragraph 39M -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2019-en-b&anchor=para_39M_b&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_b&doctype=Standard -URIDate 2019-03-27 + Details
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