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Financial instruments (Details 12) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Financial instruments [Line Items] |  |  |
Tax ID No. | 96,529,340-k |  | Oman
Country | Jordan | [1] | United States
Notional amount | $ 16,796 |  | $ 1,039,755
Non-current maturities | 300,000 |  | 1,039,755
Borrowing costs | (1,651) |  | (8,248)
Total | $ 68,870 |  | 1,031,507
Bank Borrowings Chilean Tax [Member] |  |  |
Financial instruments [Line Items] |  |  |
Tax ID No. | 93,007,000-9 |  |
Company | SQM.S.A. |  |
Country | Chile |  |
Tax ID No. | 0-E |  |
Financial institution | Scotiabank Cayman |  |
Country | USA |  |
Currency or adjustment index | US$ |  |
Repayment | Upon maturity |  |
Effective rate | 3.60% |  |
Nominal rate | 3.98% |  |
Notional amount | $ 0 |  |
Borrowing costs | 0 |  |
Between 1 year to 2 [member] |  |  |
Financial instruments [Line Items] |  |  |
Notional amount | 0 |  | 250,000
Non-current maturities | 0 |  | 250,000
Between 2 years to 3 [member] |  |  |
Financial instruments [Line Items] |  |  |
Notional amount | 0 |  | 0
Non-current maturities | 0 |  | $ 0
Between 3 Years to 4 [member] |  |  |
Financial instruments [Line Items] |  |  |
Notional amount | 70,000 |  |
Non-current maturities | $ 70,000 |  |
Non current bonds issued [Member] | Bank Borrowings Chilean Tax [Member] |  |  |
Financial instruments [Line Items] |  |  |
Tax ID No. | 93,007,000-9 |  |
Company | SQM.S.A. |  |
Country | Chile |  |
Tax ID No. | 0-E |  |
Financial institution | Scotiabank Cayman |  |
Country | USA |  |
Currency or adjustment index | USD |  |
Repayment | Maturity |  |
Effective rate | 3.98% |  |
Nominal rate | 3.98% |  |
Notional amount | $ 70,000 |  |
Non-current maturities | 70,000 |  |
Borrowing costs | (1,130) |  |
Total | 68,870 |  |
Non current bonds issued [Member] | Between 1 year to 2 [member] | Bank Borrowings Chilean Tax [Member] |  |  |
Financial instruments [Line Items] |  |  |
Non-current maturities | 0 |  |
Non current bonds issued [Member] | Between 2 years to 3 [member] | Bank Borrowings Chilean Tax [Member] |  |  |
Financial instruments [Line Items] |  |  |
Notional amount | 0 |  |
Non-current maturities | 0 |  |
Non current bonds issued [Member] | Between 3 Years to 4 [member] | Bank Borrowings Chilean Tax [Member] |  |  |
Financial instruments [Line Items] |  |  |
Notional amount | 70,000 |  |
Non-current maturities | $ 70,000 |  |
[1] | These Companies are subsidiaries of the joint venture Abu Dhabi Fertilizer Industries WWL

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