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Background of companies included in consolidation (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Background of companies included in consolidation [Line Items] |  |  |
Profit (loss) attributable to non-controlling interests | $ 2,397 | $ 733 | $ 3,641
Equity, non-controlling interests | 52,311 | 59,647 |
Total | $ 9,733 | 2,253 |
Proinsa Ltda. |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 0.10% |  |
Profit (loss) attributable to non-controlling interests | $ 0 | 0 |
Equity, non-controlling interests | 0 | 0 |
Total | $ 0 | 0 |
SQM Potasio S.A. |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 0.00% |  |
Profit (loss) attributable to non-controlling interests | $ 0 | 0 |
Equity, non-controlling interests | 0 | 0 |
Total | $ 0 | 0 |
Ajay SQM Chile S.A. |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 49.00% |  |
Profit (loss) attributable to non-controlling interests | $ 1,176 | 1,023 |
Equity, non-controlling interests | 8,659 | 8,306 |
Total | $ 823 | 989 |
SQM Indonesia S.A. |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 20.00% |  |
Profit (loss) attributable to non-controlling interests | $ 0 | 0 |
Equity, non-controlling interests | 1 | 1 |
Total | $ 0 | 0 |
Soquimich Comercial S.A. |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 39.36168% |  |
Profit (loss) attributable to non-controlling interests | $ 1,375 | 100 |
Equity, non-controlling interests | 41,855 | 49,247 |
Total | $ 8,910 | 1,264 |
Comercial Agrorama Ltda. |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 30.00% |  |
Profit (loss) attributable to non-controlling interests | $ (318) | (403) |
Equity, non-controlling interests | (481) | (184) |
Total | $ 0 | 0 |
Agrorama S.A. |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 0.001% |  |
Profit (loss) attributable to non-controlling interests | $ 0 | 0 |
Equity, non-controlling interests | 0 | 0 |
Total | $ 0 | 0 |
Orcoma Estudios SPA |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 49.00% |  |
Profit (loss) attributable to non-controlling interests | $ 0 | 0 |
Equity, non-controlling interests | 2,277 | 2,277 |
Total | $ 0 | 0 |
SQM (Thailand) Limited. |  |  |
Background of companies included in consolidation [Line Items] |  |  |
% of interests in the ownership held by non- controlling interests. | 0.004% |  |
Profit (loss) attributable to non-controlling interests | $ 0 | 0 |
Equity, non-controlling interests | 0 | 0 |
Total | $ 0 | $ 0 |

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