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Exploration and Evaluation Assets - Impairment Reversal Booked (Details) - CAD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2020 | Jun. 30, 2021 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | $ (1,126,415) | $ (416,000) |
Reversal of impairment loss recognised in profit or loss |  | 1,100,000 |  | $ 341,326
Viking And Eagle Ford Cash Generating Units |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Reversal of impairment loss recognised in profit or loss |  |  |  | 341,300
Viking CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | (356,000) | 0 |
Reversal of impairment loss recognised in profit or loss |  |  |  | 116,000
Eagle Ford CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss (reversal of impairment loss) recognised in profit or loss |  | $ (442,415) | $ 0 |
Reversal of impairment loss recognised in profit or loss |  |  |  | 225,326
Exploration and evaluation assets |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Impairment loss on financial assets | $ (127,861) |  |  |
Exploration and evaluation assets | Viking And Eagle Ford Cash Generating Units |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Reversal of impairment loss recognised in profit or loss |  |  |  | 14,803
Exploration and evaluation assets | Viking CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Reversal of impairment loss recognised in profit or loss |  |  |  | 2,000
Impairment loss on financial assets | (13,000) |  |  |
Exploration and evaluation assets | Eagle Ford CGU |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Reversal of impairment loss recognised in profit or loss |  |  |  | $ 12,803
Impairment loss on financial assets | $ (48,861) |  |  |

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- Definition The amount of impairment loss on financial assets. [Refer: Financial assets; Impairment loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -Paragraph 20 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_e&doctype=Standard&book=b -URIDate 2021-03-24 + Details
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- Definition The amount of reversal of impairment loss recognised in profit or loss. [Refer: Reversal of impairment loss; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2021-01-01 -Paragraph 126 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_126_b&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2021-01-01 -Paragraph 129 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2021-en-r&anchor=para_129_b&doctype=Standard -URIDate 2021-03-24 + Details
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