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Joint Ventures (Details 3) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash and cash equivalents |  | $ 556,066 | $ 630,438 | $ 514,669 | $ 527,259
Other current financial liabilities |  | 23,585 | 220,328 |  |
Other non-current financial liabilities |  | 1,330,382 | 1,031,507 |  |
Depreciation and amortisation expense |  | (221,499) | (240,526) | (249,792) |
Interest Expense | $ (50,124) | (59,914) | (50,124) | (57,498) |
Sichuan SQM Migao Chemical Fertilizers Co Ltda. [Member] |  |  |  |  |
Cash and cash equivalents |  | 106 | 6,198 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | (948) | (696) | (691) |
Interest Expense |  | (1) | (25) | (433) |
Income Tax Expense (Benefit) |  | 97 | 303 | 200 |
Coromandel SQM India [Member] |  |  |  |  |
Cash and cash equivalents |  | 308 | 1,118 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  |  | 0 | 0 |
Depreciation and amortisation expense |  | 445 |  |  |
Interest Expense |  | (9) | (16) | (49) |
Income Tax Expense (Benefit) |  | (38) | (485) | (44) |
SQM Vitas Fzco. [Member] |  |  |  |  |
Cash and cash equivalents |  | 19,312 | 15,307 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | (509) | (553) | (717) |
Interest Expense |  | (8) | (19) | (16) |
Income Tax Expense (Benefit) |  | 0 | 0 | 0 |
SQM Star Qingdao Corp Nutrition Co., Ltd. [Member] |  |  |  |  |
Cash and cash equivalents |  | 4,543 | 3,675 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | (67) | (68) | (64) |
Interest Expense |  | 0 | 0 | (1) |
Income Tax Expense (Benefit) |  | (187) | (174) | (195) |
SQM Vitas Brazil Agroindustria [Member] |  |  |  |  |
Cash and cash equivalents |  | 1,869 | 5,139 |  |
Other current financial liabilities |  | 13,380 | 7,342 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | (408) | (453) | (438) |
Interest Expense |  | (886) | (1,253) | (2,127) |
Income Tax Expense (Benefit) |  | (117) | (283) | (337) |
SQM Vitas Peru S.A.C. [Member] |  |  |  |  |
Cash and cash equivalents |  | 371 | 687 |  |
Other current financial liabilities |  | 3,819 | 2,215 |  |
Other non-current financial liabilities |  | 801 | 1,372 |  |
Depreciation and amortisation expense |  | (347) | (375) | (82) |
Interest Expense |  | (425) | (432) |  |
Income Tax Expense (Benefit) |  | (230) | (214) | (362) |
SQM Vitas Plantacote B.V [Member] |  |  |  |  |
Cash and cash equivalents |  | 0 | 679 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | 0 | 0 | 0 |
Interest Expense |  | 0 | (1) |  |
Income Tax Expense (Benefit) |  | 0 | 0 | 0 |
SQM Vitas Holland B.V. [Member] |  |  |  |  |
Cash and cash equivalents |  | 2,692 | 2,190 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | 0 | 0 | 0 |
Interest Expense |  | 0 | 0 | 0 |
Income Tax Expense (Benefit) |  | 0 | 0 | 0 |
Miera Exar S.A. [Member] |  |  |  |  |
Cash and cash equivalents |  | 0 | 9,189 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 |  |  |
Depreciation and amortisation expense |  | 0 | (523) | 0 |
Interest Expense |  | 0 | (32) | 0 |
Income Tax Expense (Benefit) |  | 0 | (620) | 0 |
Joint ventures [member] |  |  |  |  |
Cash and cash equivalents |  | 29,764 | 44,182 |  |
Other current financial liabilities |  | 22,663 | 9,557 |  |
Other non-current financial liabilities |  | 801 | 1,372 |  |
Depreciation and amortisation expense |  | (2,392) | (2,668) | (1,992) |
Interest Expense |  | (1,669) | (1,778) | (2,950) |
Income Tax Expense (Benefit) |  | (521) | (1,473) | (738) |
Pavoni C Spa [Member] |  |  |  |  |
Cash and cash equivalents |  | 407 | 0 |  |
Other current financial liabilities |  | 5,464 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | (542) | 0 | 0 |
Interest Expense |  | (335) | 0 | 0 |
Income Tax Expense (Benefit) |  | 0 | 0 | 0 |
Arpa Speciali SRL [Member] |  |  |  |  |
Cash and cash equivalents |  | 0 | 0 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | 0 | 0 | 0 |
Interest Expense |  | 0 | 0 | 0 |
Income Tax Expense (Benefit) |  | 0 | 0 | 0 |
Covalent Lithium Pty Ltd [Member] |  |  |  |  |
Cash and cash equivalents |  | 156 | 0 |  |
Other current financial liabilities |  | 0 | 0 |  |
Other non-current financial liabilities |  | 0 | 0 |  |
Depreciation and amortisation expense |  | (16) | 0 | 0 |
Interest Expense |  | (5) | 0 | 0 |
Income Tax Expense (Benefit) |  | $ (46) | $ 0 | $ 0 |

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