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Joint Ventures (Details 1) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Investments accounted for using equity method |  | $ 111,549 | $ 152,630 | $ 133,140
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method |  | 5,081 | 13,004 | 10,192
Share of total comprehensive income of associates and joint ventures accounted for using equity method |  | 504 | 717 | 5,458
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | (1,177) | 26 | 2,845
Sichuan SQM Migao Chemical Fertilizers Co Ltd [Member] |  |  |  |
Investments accounted for using equity method | [1] | 1,992 | 11,444 | 12,150
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method | [1] | (650) | (535) | (1,372)
Share of total comprehensive income of associates and joint ventures accounted for using equity method | [1] | (650) | (535) | (1,372)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax | [1] | $ 0 | 0 | 0
Coromandel SQM India [Member] |  |  |  |
Name of joint venture |  | Coromandel SQM India |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method |  | $ 1,729 | 1,633 | 1,499
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method |  | 174 | 165 | 435
Share of total comprehensive income of associates and joint ventures accounted for using equity method |  | 174 | 165 | 435
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | $ 0 | 0 | 0
SQM Vitas Fzco. [Member] |  |  |  |
Name of joint venture |  | SQM Vitas Fzco. |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method |  | $ 20,202 | 19,478 | 17,956
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method |  | 1,781 | 1,502 | 3,458
Share of total comprehensive income of associates and joint ventures accounted for using equity method |  | 1,781 | 1,497 | 3,907
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | $ 0 | (5) | 449
SQM Star Qingdao Corp Nutrition Co., Ltd. [Member] |  |  |  |
Name of joint venture |  | SQM Star Qingdao Corp Nutrition Co., Ltd. |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method |  | $ 3,168 | 2,980 | 2,618
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method |  | 188 | 361 | 163
Share of total comprehensive income of associates and joint ventures accounted for using equity method |  | 189 | 361 | 163
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | $ 1 | 0 | 0
SQM Vitas Brazil Agroindustria [Member] |  |  |  |
Name of joint venture |  | SQM Vitas Brazil Agroindustria |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method | [2] | $ 12,405 | 11,003 | 9,343
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method | [2] | 2,879 | 1,753 | 4,570
Share of total comprehensive income of associates and joint ventures accounted for using equity method | [2] | 779 | 826 | 5,130
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax | [2] | $ (661) | (51) | 2,845
SQM Vitas Peru S.A.C. [Member] |  |  |  |
Name of joint venture |  | SQM Vitas Perú S.A.C. |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method | [2] | $ 5,188 | 5,961 | 5,964
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method | [2] | (550) | (216) | 815
Share of total comprehensive income of associates and joint ventures accounted for using equity method | [2] | (275) | (108) | 408
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax | [2] | $ 0 | 0 | 0
SQM Vitas Plantacote B.V [Member] |  |  |  |
Name of joint venture |  | SQM Vitas Holland B.V. |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method | [3] | $ 0 | 669 | 588
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method | [3] | 0 | (1) | 187
Share of total comprehensive income of associates and joint ventures accounted for using equity method | [3] | 0 | (1) | (80)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax | [3] | 0 | 0 | 0
Minera Exar S.A. [Member] |  |  |  |
Investments accounted for using equity method | [1] | 0 | 33,065 | 25,000
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method | [1] | (206) | (27) | 0
Share of total comprehensive income of associates and joint ventures accounted for using equity method | [1] | (206) | (27) | 0
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax | [1] | (1) | 0 | 0
SQM Vitas Holland [Member] |  |  |  |
Investments accounted for using equity method |  | 1,345 | 1,429 | 1,269
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method |  | (14) | (18) | 171
Share of total comprehensive income of associates and joint ventures accounted for using equity method |  | (14) | (18) | 171
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 0 | 0 | 0
Joint ventures [member] |  |  |  |
Investments accounted for using equity method |  | 17,715 | 17,633 | 15,895
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method |  | 2,241 | 1,536 | 5,572
Share of total comprehensive income of associates and joint ventures accounted for using equity method |  | 1,287 | 1,443 | 3,304
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | $ 0 | (5) | 449
Pavoni C Spa [Member] |  |  |  |
Name of joint venture |  | Pavoni & C. Spa. |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method |  | $ 7,084 | 0 | 0
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method |  | (39) | 0 | 0
Share of total comprehensive income of associates and joint ventures accounted for using equity method |  | (40) | 0 | 0
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | $ 0 | 0 | 0
Covalent Lithium Pty Ltd [Member] |  |  |  |
Name of joint venture |  | Covalent Lithium Pty Ltd. |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method |  | $ 53 | 0 | 0
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method |  | 36 | 0 | 0
Share of total comprehensive income of associates and joint ventures accounted for using equity method |  | 53 | 0 | 0
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | $ 0 | 0 | 0
Arpa Speciali SRL [Member] |  |  |  |
Name of joint venture |  | Arpa Speciali S.R.L. |  |
Date of end of reporting period of financial statements of joint venture |  | Dec. 31, 2018 |  |
Description of whether investment in joint venture is measured using equity method or at fair value |  | Equity method |  |
Investments accounted for using equity method | [4] | $ 122 | 0 | 0
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method | [4] | (88) | 0 | 0
Share of total comprehensive income of associates and joint ventures accounted for using equity method | [4] | 0 | 0 | 0
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax | [4] | $ 0 | $ 0 | $ 0
[1] | During May 2016, SQM Vitas Holland B.V. sold its interest in SQM Vitas Spain, to SQM Iberian S.A. resulting in the latter obtaining 100% in this transaction generating a loss of ThUS$104.
[2] | SQM Vitas Fzco.
[3] | SQM Vitas Holland
[4] | Pavoni &C.SPA

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