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Financial instruments (Details 11) - USD ($) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 05, 2018 | Oct. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  | 96,529,340-k |  | Oman
Country |  |  | Jordan | [1] | United States
Maturity date |  | 2038 |  |  |
Notional amount |  |  | $ 16,796 |  | $ 1,039,755
Current maturities |  |  | 16,796 |  |
Borrowing costs |  |  | (1,651) |  | (8,248)
Total |  |  | 15,145 |  | $ 13,494
NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 5,674 |  |
Current maturities |  |  | 5,674 |  |
LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 11,122 |  |
Current maturities |  |  | $ 11,122 |  |
Single series bond One [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  | 93,007,000-9 |  | 93.007.000-9
Company |  |  | SQM S.A. |  | SQM S.A.
Country |  |  | CHILE |  | CHILE
Number of registration or ID of the instrument |  |  | - |  | -
Maturity date |  |  | 4/21/2019 |  | 04/21/2020
Currency or adjustment index |  |  | US$ |  | US$
Payment of interest |  |  | Semiannual |  | Semiannual
Nominal rate |  |  | 550.00% |  | 5.50%
Effective rate |  |  | 0.95% |  | 5.50%
Repayment |  |  | Upon maturity |  | Upon maturity
Notional amount |  |  | $ 2,674 |  | $ 250,000
Current maturities |  |  | 2,674 |  |
Borrowing costs |  |  | (386) |  | $ (517)
Total |  |  | 2,288 |  |
Single series bond One [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 2,674 |  |
Current maturities |  |  | 2,674 |  |
Single series bond One [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 0 |  |
Current maturities |  |  | $ 0 |  |
Single series bond Two [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  | 93,007,000-9 |  | 93.007.000-9
Company |  |  | SQM S.A. |  | SQM S.A.
Country |  |  | CHILE |  | CHILE
Number of registration or ID of the instrument |  |  | - |  | -
Maturity date |  |  | 1/28/2019 |  | 01/28/2025
Currency or adjustment index |  |  | US$ |  | US$
Payment of interest |  |  | Semiannual |  | Semiannual
Nominal rate |  |  | 438.00% |  | 4.38%
Effective rate |  |  | 275.00% |  | 4.38%
Repayment |  |  | Upon maturity |  | Upon maturity
Notional amount |  |  | $ 4,648 |  | $ 250,000
Current maturities |  |  | 4,648 |  |
Borrowing costs |  |  | (433) |  | $ (2,636)
Total |  |  | 4,215 |  |
Single series bond Two [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 0 |  |
Current maturities |  |  | 0 |  |
Single series bond Two [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 4,648 |  |
Current maturities |  |  | $ 4,648 |  |
Single series bond Three [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  | 93,007,000-9 |  | 93.007.000-9
Company |  |  | SQM S.A. |  | SQM S.A.
Country |  |  | CHILE |  | CHILE
Number of registration or ID of the instrument |  |  | - |  | -
Maturity date |  |  | 4/03/2019 |  | 04/03/2023
Currency or adjustment index |  |  | US$ |  | US$
Payment of interest |  |  | Semiannual |  | Semiannual
Nominal rate |  |  | 363.00% |  | 3.63%
Effective rate |  |  | 177.00% |  | 3.63%
Repayment |  |  | Upon maturity |  | Upon maturity
Notional amount |  |  | $ 2,658 |  | $ 300,000
Current maturities |  |  | 2,658 |  |
Borrowing costs |  |  | (614) |  | $ (2,618)
Total |  |  | 2,044 |  |
Single series bond Three [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 2,658 |  |
Current maturities |  |  | 2,658 |  |
Single series bond Three [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 0 |  |
Current maturities |  |  | $ 0 |  |
Series H bonds [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  | 93,007,000-9 |  | 93.007.000-9
Company |  |  | SQM S.A. |  | SQM S.A.
Country |  |  | CHILE |  | CHILE
Number of registration or ID of the instrument |  |  | 564 |  | 564
Maturity date |  |  | 1/05/2019 |  | 01/05/2030
Currency or adjustment index |  |  | UF |  | UF
Payment of interest |  |  | Semiannual |  | Semiannual
Nominal rate |  |  | 490.00% |  | 6.01%
Effective rate |  |  | 190.00% |  | 4.90%
Repayment |  |  | Semiannual |  | Semiannual
Notional amount |  |  | $ 3,756 |  | $ 174,367
Current maturities |  |  | 3,756 |  |
Borrowing costs |  |  | (139) |  | $ (1,532)
Total |  |  | 3,617 |  |
Series H bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 0 |  |
Current maturities |  |  | 0 |  |
Series H bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 3,756 |  |
Current maturities |  |  | $ 3,756 |  |
Series O bonds [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  | 93,007,000-9 |  | 93.007.000-9
Company |  |  | SQM S.A. |  | SQM S.A.
Country |  |  | CHILE |  | CHILE
Number of registration or ID of the instrument |  |  | 699 |  | 699
Maturity date |  |  | 2/01/2019 |  | 01/02/2033
Currency or adjustment index |  |  | UF |  | UF
Payment of interest |  |  | Semiannual |  | Semiannual
Nominal rate |  |  | 380.00% |  | 3.80%
Effective rate |  |  | 260.00% |  | 3.80%
Repayment |  |  | Upon maturity |  | Upon maturity
Notional amount |  |  | $ 934 |  | $ 65,388
Current maturities |  |  | 934 |  |
Borrowing costs |  |  | (67) |  | (945)
Total |  |  | 867 |  |
Series O bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 0 |  |
Current maturities |  |  | 0 |  |
Series O bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 934 |  |
Current maturities |  |  | $ 934 |  |
Series P bonds [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  | 93,007,000-9 |  |
Company |  |  | SQM S.A. |  |
Country |  |  | CHILE |  |
Number of registration or ID of the instrument |  |  | 563 |  |
Maturity date | 2028 |  | 1/15/2019 |  |
Currency or adjustment index |  |  | UF |  |
Payment of interest |  |  | Semiannual |  |
Nominal rate |  |  | 325.00% |  |
Effective rate | 3.25% |  | 307.00% |  |
Repayment |  |  | Upon maturity |  |
Notional amount |  |  | $ 1,784 |  |
Current maturities |  |  | 1,784 |  |
Borrowing costs |  |  | (12) |  |
Total |  |  | 1,772 |  |
Series P bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 0 |  |
Current maturities |  |  | 0 |  |
Series P bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 1,784 |  |
Current maturities |  |  | $ 1,784 |  |
Series Q bonds [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  | 93.007.000-9 |  |
Company |  |  | SQM S.A. |  |
Country |  |  | Chile |  |
Number of registration or ID of the instrument |  |  | 700 |  |
Maturity date |  |  | 6/01/2019 |  |
Currency or adjustment index |  |  | UF |  |
Payment of interest |  |  | Semiannual |  |
Nominal rate |  |  | 345.00% |  |
Effective rate |  | 3.45% | 334.00% |  |
Repayment |  |  | Upon maturity |  |
Notional amount |  |  | $ 342 |  |
Current maturities |  |  | 342 |  |
Borrowing costs |  |  | 0 |  |
Total |  |  | 342 |  |
Series Q bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 342 |  |
Current maturities |  |  | 342 |  |
Series Q bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  | 0 |  |
Current maturities |  |  | $ 0 |  |
Current bonds issued [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | 15,133
Borrowing costs |  |  |  |  | (1,639)
Total |  |  |  |  | 13,494
Current bonds issued [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | 9,801
Current bonds issued [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | $ 5,332
Current bonds issued [Member] | Single series bond One [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  |  |  | 93,007,000-9
Company |  |  |  |  | SQM S.A.
Country |  |  |  |  | CHILE
Number of registration or ID of the instrument |  |  |  |  | -
Maturity date |  |  |  |  | 04/21/2018
Currency or adjustment index |  |  |  |  | US$
Payment of interest |  |  |  |  | Semiannual
Nominal rate |  |  |  |  | 5.50%
Effective rate |  |  |  |  | 1.47%
Repayment |  |  |  |  | Upon maturity
Notional amount |  |  |  |  | $ 0
Current maturities |  |  |  |  | 2,674
Borrowing costs |  |  |  |  | (385)
Total |  |  |  |  | 2,289
Current bonds issued [Member] | Single series bond One [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | 0
Current bonds issued [Member] | Single series bond One [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | $ 2,674
Current bonds issued [Member] | Single series bond Two [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  |  |  | 93,007,000-9
Company |  |  |  |  | SQM S.A.
Country |  |  |  |  | CHILE
Number of registration or ID of the instrument |  |  |  |  | -
Maturity date |  |  |  |  | 01/28/2018
Currency or adjustment index |  |  |  |  | US$
Payment of interest |  |  |  |  | Semiannual
Nominal rate |  |  |  |  | 4.38%
Effective rate |  |  |  |  | 3.17%
Repayment |  |  |  |  | Upon maturity
Notional amount |  |  |  |  | $ 0
Current maturities |  |  |  |  | 4,648
Borrowing costs |  |  |  |  | (433)
Total |  |  |  |  | 4,215
Current bonds issued [Member] | Single series bond Two [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | 4,648
Current bonds issued [Member] | Single series bond Two [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | $ 0
Current bonds issued [Member] | Single series bond Three [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  |  |  | 93,007,000-9
Company |  |  |  |  | SQM S.A.
Country |  |  |  |  | CHILE
Number of registration or ID of the instrument |  |  |  |  | -
Maturity date |  |  |  |  | 04/03/2018
Currency or adjustment index |  |  |  |  | US$
Payment of interest |  |  |  |  | Semiannual
Nominal rate |  |  |  |  | 3.63%
Effective rate |  |  |  |  | 2.12%
Repayment |  |  |  |  | Upon maturity
Notional amount |  |  |  |  | $ 0
Current maturities |  |  |  |  | 2,658
Borrowing costs |  |  |  |  | (615)
Total |  |  |  |  | 2,043
Current bonds issued [Member] | Single series bond Three [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | 0
Current bonds issued [Member] | Single series bond Three [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | $ 2,658
Current bonds issued [Member] | Series H bonds [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  |  |  | 93,007,000-9
Company |  |  |  |  | SQM S.A.
Country |  |  |  |  | CHILE
Number of registration or ID of the instrument |  |  |  |  | 564
Maturity date |  |  |  |  | 01/05/2018
Currency or adjustment index |  |  |  |  | UF
Payment of interest |  |  |  |  | Semiannual
Nominal rate |  |  |  |  | 4.90%
Effective rate |  |  |  |  | 2.18%
Repayment |  |  |  |  | Semiannual
Notional amount |  |  |  |  | $ 0
Current maturities |  |  |  |  | 4,127
Borrowing costs |  |  |  |  | (139)
Total |  |  |  |  | 3,988
Current bonds issued [Member] | Series H bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | 4,127
Current bonds issued [Member] | Series H bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | $ 0
Current bonds issued [Member] | Series O bonds [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Tax ID No. |  |  |  |  | 93,007,000-9
Company |  |  |  |  | SQM S.A.
Country |  |  |  |  | CHILE
Number of registration or ID of the instrument |  |  |  |  | 699
Maturity date |  |  |  |  | 02/01/2018
Currency or adjustment index |  |  |  |  | UF
Payment of interest |  |  |  |  | Semiannual
Nominal rate |  |  |  |  | 3.80%
Effective rate |  |  |  |  | 2.80%
Repayment |  |  |  |  | Upon maturity
Notional amount |  |  |  |  | $ 0
Current maturities |  |  |  |  | 1,026
Borrowing costs |  |  |  |  | (67)
Total |  |  |  |  | 959
Current bonds issued [Member] | Series O bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | 1,026
Current bonds issued [Member] | Series O bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |
Notional amount |  |  |  |  | 0
Current maturities |  |  |  |  | $ 0
[1] | These Companies are subsidiaries of the joint venture Abu Dhabi Fertilizer Industries WWL

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