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Oil and Gas Properties - Sensitivity of the Estimated Recoverable Amount of Possible Changes (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
CAD ($)
cadPerBbl
cadPerMcf
Dec. 31, 2021
CAD ($)
Disclosure of detailed information about property, plant and equipment [line items]    
Discount rate 1.00%  
Oil price | cadPerBbl 2.50  
Gas price | cadPerMcf 0.25  
Recoverable amount $ 4,670,059  
Impairment reversal 245,241 $ 0
Change in discount rate of 1% 146,800  
Change in oil price of $2.50/bbl 262,100  
Change in gas price of $0.25/mcf 32,500  
Conventional CGU (1)    
Disclosure of detailed information about property, plant and equipment [line items]    
Recoverable amount 119,031  
Impairment reversal 23,707  
Change in discount rate of 1% 0  
Change in oil price of $2.50/bbl 0  
Change in gas price of $0.25/mcf 0  
Peace River CGU (1)    
Disclosure of detailed information about property, plant and equipment [line items]    
Recoverable amount 676,939  
Impairment reversal 140,534  
Change in discount rate of 1% 0  
Change in oil price of $2.50/bbl 0  
Change in gas price of $0.25/mcf 0  
Lloydminster CGU    
Disclosure of detailed information about property, plant and equipment [line items]    
Recoverable amount 449,250  
Impairment reversal 0  
Change in discount rate of 1% 11,500  
Change in oil price of $2.50/bbl 53,000  
Change in gas price of $0.25/mcf 0  
Viking CGU    
Disclosure of detailed information about property, plant and equipment [line items]    
Recoverable amount 1,322,193  
Impairment reversal 81,000  
Change in discount rate of 1% 39,500  
Change in oil price of $2.50/bbl 78,000  
Change in gas price of $0.25/mcf 4,000  
Eagle Ford CGU    
Disclosure of detailed information about property, plant and equipment [line items]    
Recoverable amount 2,102,646  
Impairment reversal 0  
Change in discount rate of 1% 95,800  
Change in oil price of $2.50/bbl 131,100  
Change in gas price of $0.25/mcf $ 28,500