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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2020
Earnings Per Share [Abstract]  
Calculation of our Basic and Diluted Earnings per share Calculation
The following table shows the information used in the calculation of our basic and diluted earnings per share calculation for the three and nine months ended September 30, 2020 and 2019:
For the Three Months Ended September 30,For the Nine Months
Ended September 30,
2020201920202019
Weighted average common shares outstanding for basic calculation267,265,705 290,112,233 267,908,427 290,410,859 
Add: Effect of stock options, deferred share units and restricted stock units13,850 15,063 12,463 11,492 
Weighted average common shares outstanding for diluted calculation267,279,555 290,127,296 267,920,890 290,422,351