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Supplemental information on oil and gas activities (Schedule of Results of Operations for Oil and Gas Producing Activities) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Supplemental information on oil and gas activities [Line Items] |  |  |
Revenue | $ 688,543 | $ 393,692 | $ 628,907
Production costs, excluding depreciation |  |  |
Operating costs | (99,767) | (89,197) | (104,388)
Royalties | (113,023) | (35,875) | (64,576)
Total production costs | (212,790) | (125,072) | (168,964)
Exploration expenses | (16,783) | (64,488) | (31,146)
Accretion expense | (3,140) | (4,276) | (3,650)
Impairment loss for non-financial assets | (4,334) | (99,889) | (7,559)
Depreciation, depletion and amortization | (78,479) | (106,164) | (99,984)
Results of operations before income tax | 373,017 | (6,197) | 317,604
Income tax (expense) benefit | (120,890) | (24,862) | (109,878)
Results of oil and gas operations | 252,127 | (31,059) | 207,726
Colombia [Member] |  |  |
Disclosure Of Supplemental information on oil and gas activities [Line Items] |  |  |
Revenue | 618,268 | 334,606 | 538,917
Production costs, excluding depreciation |  |  |
Operating costs | (72,043) | (61,866) | (60,545)
Royalties | (106,341) | (30,453) | (56,399)
Total production costs | (178,384) | (92,319) | (116,944)
Exploration expenses | (11,276) | (12,493) | (10,921)
Accretion expense | (576) | (670) | (813)
Impairment loss for non-financial assets | 0 | 0 | 0
Depreciation, depletion and amortization | (54,588) | (56,720) | (44,906)
Results of operations before income tax | 373,444 | 172,404 | 365,333
Income tax (expense) benefit | (115,989) | (55,169) | (120,560)
Results of oil and gas operations | 257,455 | 117,235 | 244,773
Chile [Member] |  |  |
Disclosure Of Supplemental information on oil and gas activities [Line Items] |  |  |
Revenue | 21,471 | 21,704 | 32,336
Production costs, excluding depreciation |  |  |
Operating costs | (10,280) | (9,491) | (18,608)
Royalties | (770) | (753) | (1,181)
Total production costs | (11,050) | (10,244) | (19,789)
Exploration expenses | (4,509) | (50,301) | (126)
Accretion expense | (1,319) | (1,358) | (1,283)
Impairment loss for non-financial assets | (17,641) | (81,967) | 0
Depreciation, depletion and amortization | (12,806) | (32,233) | (34,344)
Results of operations before income tax | (25,854) | (154,399) | (23,206)
Income tax (expense) benefit | 3,878 | 23,160 | 3,481
Results of oil and gas operations | (21,976) | (131,239) | (19,725)
Brazil [Member] |  |  |
Disclosure Of Supplemental information on oil and gas activities [Line Items] |  |  |
Revenue | 20,109 | 12,783 | 23,049
Production costs, excluding depreciation |  |  |
Operating costs | (2,954) | (2,827) | (4,098)
Royalties | (1,642) | (1,049) | (1,855)
Total production costs | (4,596) | (3,876) | (5,953)
Exploration expenses |  | (1,000) | (6,152)
Accretion expense | (535) | (867) | (832)
Impairment loss for non-financial assets | 0 | (1,717) | 0
Depreciation, depletion and amortization | (2,933) | (2,488) | (6,200)
Results of operations before income tax | 12,045 | 2,835 | 3,912
Income tax (expense) benefit | (4,095) | (964) | (1,330)
Results of oil and gas operations | 7,950 | 1,871 | 2,582
Argentina [Member] |  |  |
Disclosure Of Supplemental information on oil and gas activities [Line Items] |  |  |
Revenue | 28,695 | 24,599 | 34,605
Production costs, excluding depreciation |  |  |
Operating costs | (14,490) | (15,013) | (21,137)
Royalties | (4,270) | (3,620) | (5,141)
Total production costs | (18,760) | (18,633) | (26,278)
Exploration expenses | (998) | (694) | (13,947)
Accretion expense | (710) | (1,381) | (722)
Impairment loss for non-financial assets | 13,307 | (16,205) | (7,559)
Depreciation, depletion and amortization | (8,152) | (14,723) | (14,534)
Results of operations before income tax | 13,382 | (27,037) | (28,435)
Income tax (expense) benefit | (4,684) | 8,111 | 8,531
Results of oil and gas operations | $ 8,698 | $ (18,926) | $ (19,904)

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