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Capital Management (Tables)
 12 Months Ended
Dec. 31, 2021
Corporate Information And Statement Of IFRS Compliance [Abstract]  
Net Debt
December 31, 2021December 31, 2020
Credit facilities$505,171 $649,221 
Unamortized debt issuance costs - Credit Facilities (note 7)1,343 1,952 
Long-term notes 874,527 1,132,868 
Unamortized debt issuance costs - Long-term notes (note 8)11,393 15,082 
Trade and other payables190,692 155,955 
Trade and other receivables(173,409)(107,477)
Net Debt$1,409,717 $1,847,601 
Adjusted Funds Flow
Adjusted Funds Flow is reconciled to amounts disclosed in the primary financial statements in the following table.
Years Ended December 31
20212020
Cash flows from operating activities$712,384 $353,096 
Change in non-cash working capital26,582 (48,758)
Asset retirement obligations settled6,662 7,168 
Adjusted Funds Flow$745,628 $311,506 
Net Debt to Adjusted Funds Flow1.9 5.9