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Exploration and Evaluation Assets (Tables)

12 Months Ended

Dec. 31, 2020

Exploration For And Evaluation Of Mineral Resources [Abstract]

Exploration and evaluation assets

			December 31, 2020			December 31, 2019
Balance, beginning of year			$	320,210		$	358,935
Capital expenditures			4,490			2,948
Property acquisitions			—			1,523
Divestitures			—			(443)
Impairment			(113,058)			(7,822)
Property swaps			468			417
Exploration and evaluation expense			(14,011)			(11,764)
Transfers to oil and gas properties (note 6)			(8,585)			(16,204)
Foreign currency translation			2,351			(7,380)
Balance, end of year			$	191,865		$	320,210

Impairment of cash generating units

The following table indicates the impairment booked for each CGU at March 31, 2020.

			Impairment at March 31, 2020
Conventional CGU			$	4,000
Peace River CGU			20,000
Lloydminster CGU			42,000
Viking CGU			13,000
Eagle Ford CGU			48,861
			$	127,861

Schedule of impairment and impairment reversal

The following table indicates the impairment reversal booked for the Viking and Eagle Ford CGUs at December 31, 2020.

			Impairment reversal at December 31, 2020
Viking CGU			$	2,000
Eagle Ford CGU			12,803
			$	14,803

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Exploration For And Evaluation Of Mineral Resources [Abstract]

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The disclosure of detailed information about intangible assets. [Refer: Intangible assets other than goodwill]

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The disclosure of impairment loss and the reversal of impairment loss. [Refer: Impairment loss; Reversal of impairment loss]

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The disclosure of an impairment loss recognised or reversed for a cash-generating unit. [Refer: Impairment loss; Reversal of impairment loss]

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