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Joint Ventures (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Statement [Line Items] |  |  |  |
Cash and cash equivalents | $ 509,102 | $ 588,530 | $ 556,066 | $ 630,438
Other current financial liabilities | 68,955 | 291,128 |  |
Other non-current financial liabilities | 1,899,513 | 1,488,723 |  |
Depreciation and amortisation expense | (203,912) | (201,351) | (220,827) |
Interest Expense |  | (76,939) | $ (57,807) | $ (82,199)
Sichuan SQM Migao Chemical Fertilizers Co Ltda. [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 30 | 33 |  |
Other current financial liabilities | 0 | 0 |  |
Other non-current financial liabilities | 0 | 0 |  |
Depreciation and amortisation expense | (394) | (743) |  |
Interest Expense | 0 | 0 |  |
Income Tax Benefit (expense) | 244 | 153 |  |
Coromandel SQM India [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 2,240 |  |
Other current financial liabilities | 0 | 0 |  |
Other non-current financial liabilities | 0 | 0 |  |
Depreciation and amortisation expense |  | 291 |  |
Depreciation and amortisation expense | 0 |  |  |
Interest Expense | 0 | (4) |  |
Income Tax Benefit (expense) | 0 | (27) |  |
SQM Vitas Fzco. [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 4,251 | 3,071 |  |
Other current financial liabilities | 0 | 0 |  |
Other non-current financial liabilities | 0 | 0 |  |
Depreciation and amortisation expense | (1) | 0 |  |
Interest Expense | (2) | (7) |  |
Income Tax Benefit (expense) | 0 | 0 |  |
SQM Star Qingdao Corp Nutrition Co., Ltd. [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 4,640 |  |
Other current financial liabilities | 0 | 0 |  |
Other non-current financial liabilities | 0 | 0 |  |
Depreciation and amortisation expense | 0 | (62) |  |
Interest Expense | 0 | 0 |  |
Income Tax Benefit (expense) | 0 | (241) |  |
SQM Vitas Brazil Agroindustria [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 4,065 | 2,101 |  |
Other current financial liabilities | 6,820 | 9,106 |  |
Other non-current financial liabilities | 0 | 0 |  |
Depreciation and amortisation expense | (257) | (287) |  |
Interest Expense | (326) | (435) |  |
Income Tax Benefit (expense) | (197) | (316) |  |
SQM Vitas Peru S.A.C. [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 1,043 | 225 |  |
Other current financial liabilities | 227 | 258 |  |
Other non-current financial liabilities | 691 | 895 |  |
SQM Vitas Plantacote B.V [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Depreciation and amortisation expense | (355) | (33) |  |
Interest Expense | (656) | (1,176) |  |
Income Tax Benefit (expense) | (34) |  |  |
SQM Vitas BV [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 0 | 2,609 |  |
Other current financial liabilities | 0 | 0 |  |
Other non-current financial liabilities | 0 | 0 |  |
Depreciation and amortisation expense | 0 | 0 |  |
Interest Expense | 0 | (1) |  |
Income Tax Benefit (expense) | 0 | 0 |  |
Joint ventures [member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 10,809 | 15,926 |  |
Other current financial liabilities | 13,573 | 15,345 |  |
Other non-current financial liabilities | 691 | 895 |  |
Depreciation and amortisation expense | (1,483) | (1,691) |  |
Interest Expense | (1,412) | (1,655) |  |
Income Tax Benefit (expense) | 607 | (464) |  |
Pavoni C Spa [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 767 | 314 |  |
Other current financial liabilities | 5,573 | 5,509 |  |
Other non-current financial liabilities | 0 | 0 |  |
Depreciation and amortisation expense | (263) | (149) |  |
Interest Expense | (410) | 0 |  |
Income Tax Benefit (expense) | (120) | (214) |  |
Covalent Lithium Pty Ltd [Member] |  |  |  |
Statement [Line Items] |  |  |  |
Cash and cash equivalents | 653 | 693 |  |
Other current financial liabilities | 953 | 472 |  |
Other non-current financial liabilities | 0 | 0 |  |
Depreciation and amortisation expense | (213) | (126) |  |
Interest Expense | (18) | (32) |  |
Income Tax Benefit (expense) | $ 714 | $ 0 |  |

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