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Financial Instruments-risk management (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) item customer | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Jan. 01, 2023 USD ($)
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Foreign exchange gain (loss) | $ 19,725,000 | $ 5,049,000 | $ (13,008,000) |
Repayments of borrowings, classified as financing activities | 172,522,000 | 274,934,000 | 3,575,000 |
Borrowings | $ 497,642,000 | $ 674,092,000 |  |
Gearing Ratio | 76.00% | 112.00% |  |
Derivative financial instruments |  |  |  | $ 38,000,000
Banco Santander [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Borrowings |  | $ 2,319,000 |  |
Ifrs Scenario Plan [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Price Decrease Additional Percentage Against Actual Price | 10.00% |  |  |
Price fluctuation gain (loss) | $ 47,330,000 | $ 17,899,000 | $ (21,014,000) |
Currency risk [member] | Chilean Peso [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Currency Devaluation Percentage Against Dollar | 1.00% | 19.00% |  |
Currency Revaluation Percentage Against Dollar |  |  | 5.00% |
Currency risk [member] | Colombian Peso [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Currency Devaluation Percentage Against Dollar | 21.00% | 16.00% | 5.00% |
Currency risk [member] | Brazilian Real [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Currency Devaluation Percentage Against Dollar |  | 7.00% | 29.00% |
Currency Revaluation Percentage Against Dollar | 7.00% |  |  |
Currency risk [member] | Ifrs Scenario Plan [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Currency Devaluation Additional Percentage Against Dollar | 10.00% |  |  |
Net foreign exchange gain | $ 14,695,000 | $ 9,070,000 |  |
Net foreign exchange loss |  |  | $ 9,057,000 |
Currency risk [member] | Ifrs Scenario Plan [Member] | Brazilian Real [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Currency Devaluation Additional Percentage Against Dollar | 10.00% |  |  |
Net foreign exchange loss | $ 726,000 | $ 780,000 | $ 909,000 |
Liquidity risk [member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Cash | $ 128,843,000 |  |  |
Barrels of oil equivalent per day in production at year end | item | 37,700 |  |  |
Interest Rate Risk [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Borrowings | $ 0 |  |  |
Interest Rate Risk [Member] | Fixed interest rate [member] | 2027 Notes [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Borrowings, interest rate | 5.50% |  |  |
Borrowings | $ 500,000,000 |  |  |
Credit Risk [Member] | Third Party Supplier for Crude Oil [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Percentage of entity's revenue | 1.00% |  |  |
Credit Risk [Member] | Ecuador [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Percentage of entity's revenue | 1.00% |  |  |
Percentage of entity's production sold | 100.00% |  |  |
Credit Risk [Member] | Minimum |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Gearing Ratio | 60.00% |  |  |
Credit Risk [Member] | Maximum |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Gearing Ratio | 80.00% |  |  |
Credit Risk [Member] | ENAP [Member] | Chile [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Percentage of entity's revenue | 1.00% | 1.00% | 1.00% |
Credit Risk [Member] | Methanex Chile SpA [Member] | Chile [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Percentage of entity's revenue | 1.00% | 2.00% | 4.00% |
Credit Risk [Member] | Petrobras Brazil [Member] | Brazil [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Percentage of entity's revenue | 2.00% | 3.00% | 3.00% |
Credit Risk [Member] | Three Clients [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Percentage of entity's revenue | 90.00% | 89.00% | 83.00% |
Credit Risk [Member] | Three Clients [Member] | Colombian subsidiary [Member] |  |  |  |
Disclosure Of Financial Instruments Risk management [Line items] |  |  |  |
Concentration risk, number of customers | customer | 3 |  |  |
Percentage of entity's revenue | 97.00% | 99.00% | 98.00% |

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