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Consolidated Statements of Cash Flows - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Operating activities    
Net income (loss) $ 1,613,600 $ (2,438,964)
Adjustments for:    
Share-based compensation 6,389 7,216
Unrealized foreign exchange (gain) loss (1,905) 9,232
Exploration and evaluation 15,212 14,011
Depletion and depreciation   486,380
Impairment (impairment reversal) (1,542,414) 2,360,220
Non-cash financing, accretion and early redemption expense 19,090 18,907
Non-cash other income (2,857) (2,128)
Unrealized financial derivatives loss 103,631 18,500
Gain on dispositions (9,666) (901)
Deferred income tax expense (recovery) 79,968 (160,967)
Asset retirement obligations settled (6,662) (7,168)
Change in non-cash working capital (26,582) 48,758
Cash flows from operating activities 712,384 353,096
Financing activities    
(Decrease) increase in credit facilities (145,321) 143,248
Payments on lease obligations (4,334) (5,925)
Net proceeds from issuance of long-term notes 0 652,150
Redemption of long-term notes (251,969) (833,672)
Cash flows used in financing activities (401,624) (44,199)
Investing activities    
Additions to exploration and evaluation assets (3,298) (4,490)
Additions to oil and gas properties (310,005) (275,850)
Additions to other plant and equipment (907) (2,280)
Property acquisitions (1,557) 0
Proceeds from dispositions 7,804 182
Change in non-cash working capital (2,797) (32,031)
Cash flows used in investing activities (310,760) (314,469)
Change in cash 0 (5,572)
Cash, beginning of year 0 5,572
Cash, end of year 0 0
Supplementary information    
Interest paid 93,114 102,358
Income taxes paid $ 253 $ 1,155