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Leases - Recognition of lease liabilities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Summary of significant accounting policies [Abstract] |  |  |
Lease liabilities, Beginning balance | $ 22,347 | $ 13,243 |
Additions / changes in estimates | 5,288 | 561 |
Acquisitions (Note 36.1) |  | 17,851 |
Exchange difference | (365) | 466 |
Foreign currency translation | (461) | (1,641) |
Unwinding of discount | 1,453 | 1,247 |
Lease payments | (7,518) | (9,380) | $ (4,855)
Lease liabilities, Ending balance | $ 20,744 | $ 22,347 | $ 13,243

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- Definition The amount of additions to lease liabilities. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | gprk_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Lease liabilities, acquisitions during the period. + References No definition available. + Details
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Balance Type: | credit
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- Definition Amount of lease liabilities exchange differences. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Amount of foreign currency translation changes in lease liabilities. + References No definition available. + Details
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- Definition Amount of unwinding discount in lease liabilities. + References No definition available. + Details
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Namespace Prefix: | gprk_
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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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Balance Type: | credit
Period Type: | instant

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- Definition The cash outflow for payment of lease liabilities, classified as financing activities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2021-01-01 -Paragraph 17 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2021-en-r&anchor=para_17_e&doctype=Standard -URIDate 2021-03-24 + Details
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