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Financial Instruments and Risk Management - Credit Risk (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of financial assets [line items]    
Current trade receivables $ 228,485 $ 173,409
Financial assets neither past due nor impaired | Current (less than 30 days)    
Disclosure of financial assets [line items]    
Current trade receivables 222,721 171,058
Financial assets neither past due nor impaired | 31-60 days    
Disclosure of financial assets [line items]    
Current trade receivables 1,993 441
Financial assets neither past due nor impaired | 61-90 days    
Disclosure of financial assets [line items]    
Current trade receivables 766 107
Financial assets past due but not impaired | Past due (more than 90 days)    
Disclosure of financial assets [line items]    
Current trade receivables $ 3,005 1,803
Trade receivable, purchasers of petroleum and natural gas    
Disclosure of financial assets [line items]    
Trade receivable typical collection period 25 days  
Trade receivable, accrued petroleum and natural gas sales    
Disclosure of financial assets [line items]    
Included in accounts receivable $ 180,300 154,000
Trade receivables    
Disclosure of financial assets [line items]    
Allowance for doubtful accounts $ 2,500 $ 2,600
Minimum | Trade receivable, joint interest receivable    
Disclosure of financial assets [line items]    
Trade receivable typical collection period 1 month  
Maximum | Trade receivable, joint interest receivable    
Disclosure of financial assets [line items]    
Trade receivable typical collection period 3 months