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Exploration and Evaluation Assets - Schedule of Assets (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Exploration and evaluation assets, beginning of year | $ 320,210 |
Exploration and evaluation expense | (14,011) | $ (11,764)
Exploration and evaluation assets, end of year | 191,865 | 320,210
Exploration and evaluation assets |  |
Reconciliation of changes in intangible assets other than goodwill [abstract] |  |
Exploration and evaluation assets, beginning of year | 320,210 | 358,935
Capital expenditures | 4,490 | 2,948
Property acquisitions | 0 | 1,523
Divestitures | 0 | (443)
Impairment | (113,058) | (7,822)
Property swaps | 468 | 417
Exploration and evaluation expense | (14,011) | (11,764)
Transfers to oil and gas properties | (8,585) | (16,204)
Foreign currency translation | 2,351 | (7,380)
Exploration and evaluation assets, end of year | $ 191,865 | $ 320,210

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- Definition The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2020-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2020-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The decrease in property, plant and equipment resulting from disposals. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e_ii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of expense arising from the search for mineral resources, including minerals, oil, natural gas and similar non-regenerative resources after the entity has obtained legal rights to explore in a specific area, as well as the determination of the technical feasibility and commercial viability of extracting the mineral resource. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 6 -IssueDate 2020-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=6&code=ifrs-tx-2020-en-r&anchor=para_24_b&doctype=Standard -URIDate 2020-01-01 + Details
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