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Financial instruments by category (Schedule of Financial Liabilities - contractual undiscounted cash flows) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |  |
Lease liabilities | $ 20,744 | $ 22,347 | $ 13,243
To be paid to co-venturers | 0 | 3,528 |
Entities with joint control or significant influence over entity [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
To be paid to co-venturers | 953 | 5,760 | $ 4,803
Less than 1 year [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings | 40,943 | 48,311 |
Lease liabilities | 9,230 | 10,890 |
Trade payables | 85,132 | 62,408 |
Non-derivative financial liabilities, undiscounted cash flows | 136,258 | 127,131 |
Less than 1 year [member] | Entities with joint control or significant influence over entity [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
To be paid to co-venturers | 953 | 1,994 |
Less than 1 year [member] | LG International Corporation [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Payables to related parties |  | 3,528 |
Between 1 and 2 years [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings | 38,550 | 49,444 |
Lease liabilities | 6,558 | 6,230 |
Trade payables | 1,540 | 1,120 |
Non-derivative financial liabilities, undiscounted cash flows | 46,648 | 60,560 |
Between 1 and 2 years [member] | Entities with joint control or significant influence over entity [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
To be paid to co-venturers | 0 | 3,766 |
Between 1 and 2 years [member] | LG International Corporation [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Payables to related parties |  | 0 |
Between 2 and 5 years [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings | 263,550 | 538,000 |
Lease liabilities | 5,820 | 5,294 |
Trade payables | 0 | 0 |
Non-derivative financial liabilities, undiscounted cash flows | 269,370 | 543,294 |
Between 2 and 5 years [member] | Entities with joint control or significant influence over entity [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
To be paid to co-venturers | 0 | 0 |
Between 2 and 5 years [member] | LG International Corporation [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Payables to related parties |  | 0 |
Over 5 years [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Borrowings | 513,750 | 378,875 |
Lease liabilities | 2,871 | 3,653 |
Trade payables | 0 | 0 |
Non-derivative financial liabilities, undiscounted cash flows | 516,621 | 382,528 |
Over 5 years [member] | Entities with joint control or significant influence over entity [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
To be paid to co-venturers | $ 0 | 0 |
Over 5 years [member] | LG International Corporation [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Payables to related parties |  | $ 0 |

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- Definition The amount of contractual undiscounted cash flows in relation to payables to related parties. + References No definition available. + Details
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- Definition The amounts payable resulting from related party transactions. [Refer: Related parties [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2021-01-01 -Paragraph 20 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_20&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 24 -IssueDate 2021-01-01 -Paragraph 18 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_18_b&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of contractual undiscounted cash flows in relation to bank borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph B11D -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_B11D&doctype=Appendix&subtype=B -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph IG31A -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_IG31A&doctype=Implementation%20Guidance -URIDate 2021-03-24 + Details
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- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2021-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_47_b&doctype=Standard -URIDate 2021-03-24 + Details
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