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Financial instruments - Classes of Interest-Bearing Loans, Non-Current (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Financial instruments [Line Items] |  |
Notional amounts | $ 345,949 | $ 43,396
Borrowing costs | $ (2,360) | $ (2,802)
Scotiabank Cayman |  |
Financial instruments [Line Items] |  |
Effective rate | 2.33% | 2.05%
Nominal rate | 3.19% | 1.36%
Scotiabank Sud Americano |  |
Financial instruments [Line Items] |  |
Effective rate | 5.10% |
Nominal rate | 6.08% |
Unsecured obligations |  |
Financial instruments [Line Items] |  |
Notional amounts | $ 200,000 | $ 70,000
Non-current maturities | 200,000 | 70,000
Borrowing costs | (2,478) | (387)
Total | 197,522 | $ 69,613
Unsecured obligations | Scotiabank Cayman |  |
Financial instruments [Line Items] |  |
Company |  | SQM S.A.
Financial institution |  | Scotiabank Cayman
Notional amounts |  | $ 70,000
Non-current maturities |  | 70,000
Borrowing costs |  | (387)
Total |  | 69,613
Unsecured obligations | Scotiabank Sud Americano |  |
Financial instruments [Line Items] |  |
Notional amounts | 200,000 |
Non-current maturities | 200,000 |
Borrowing costs | (2,478) |
Total | 197,522 |
Unsecured obligations | Between 1 year to 2 years |  |
Financial instruments [Line Items] |  |
Notional amounts |  | 0
Non-current maturities |  | 0
Unsecured obligations | Between 1 year to 2 years | Scotiabank Cayman |  |
Financial instruments [Line Items] |  |
Notional amounts |  | 0
Non-current maturities |  | 0
Unsecured obligations | Between 2 years to 3 years |  |
Financial instruments [Line Items] |  |
Notional amounts | 200,000 | 70,000
Non-current maturities | 200,000 | 70,000
Unsecured obligations | Between 2 years to 3 years | Scotiabank Cayman |  |
Financial instruments [Line Items] |  |
Notional amounts | 0 | 70,000
Non-current maturities | 0 | 70,000
Unsecured obligations | Between 2 years to 3 years | Scotiabank Sud Americano |  |
Financial instruments [Line Items] |  |
Notional amounts | 200,000 |
Non-current maturities | 200,000 |
Unsecured obligations | Over 3 year to 4 years |  |
Financial instruments [Line Items] |  |
Notional amounts | 0 | 0
Non-current maturities | 0 | 0
Unsecured obligations | Over 3 year to 4 years | Scotiabank Cayman |  |
Financial instruments [Line Items] |  |
Notional amounts | 0 | 0
Non-current maturities | 0 | $ 0
Unsecured obligations | Over 3 year to 4 years | Scotiabank Sud Americano |  |
Financial instruments [Line Items] |  |
Notional amounts | 0 |
Non-current maturities | $ 0 |

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- Definition The amount of interest and other costs that an entity incurs in connection with the borrowing of funds. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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