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Leases - Right-Of-Use Assets (Details) - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Leases [Roll Forward] |  |
Right-of-use assets, beginning balance | $ 13,619 | $ 17,998
Additions | 1,185 | 1,827
Modifications | 1,933 | 17
Depreciation | (5,639) | (6,223)
Right-of-use assets, ending balance | 11,098 | 13,619
Office Leases |  |
Leases [Roll Forward] |  |
Right-of-use assets, beginning balance | 9,865 | 14,775
Additions | 20 | 0
Modifications | 1,846 | (6)
Depreciation | (3,799) | (4,904)
Right-of-use assets, ending balance | 7,932 | 9,865
Field Equipment |  |
Leases [Roll Forward] |  |
Right-of-use assets, beginning balance | 3,089 | 2,254
Additions | 962 | 1,668
Modifications | 80 | 4
Depreciation | (1,381) | (837)
Right-of-use assets, ending balance | 2,750 | 3,089
Vehicles And Other |  |
Leases [Roll Forward] |  |
Right-of-use assets, beginning balance | 665 | 969
Additions | 203 | 159
Modifications | 7 | 19
Depreciation | (459) | (482)
Right-of-use assets, ending balance | $ 416 | $ 665

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- Definition Leases + References No definition available. + Details
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- Definition Modifications To Right-Of-Use Assets + References No definition available. + Details
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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 53 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_h&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 53 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2020-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_j&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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