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Petroleum and Natural Gas Sales
12 Months Ended
Dec. 31, 2020
Disclosure of revenue from contracts with customers [Abstract]  
Petroleum and Natural Gas Sales PETROLEUM AND NATURAL GAS SALES
The Company's petroleum and natural gas sales from contracts with customers for each reportable segment is set forth in the following table.
Years Ended December 31
20202019
CanadaU.S.TotalCanadaU.S.Total
Light oil and condensate$296,125 $327,460 $623,585 $538,487 $600,163 $1,138,650 
Heavy oil236,235  236,235 500,187 — 500,187 
NGL6,037 34,845 40,882 8,430 60,647 69,077 
Natural gas sales33,344 41,431 74,775 30,620 67,385 98,005 
Total petroleum and natural gas sales$571,741 $403,736 $975,477 $1,077,724 $728,195 $1,805,919 

Included in accounts receivable at December 31, 2020 is $81.3 million (December 31, 2019 - $138.0 million) of accrued petroleum and natural gas sales related to deliveries for periods ended prior to the reporting date.