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Earnings Per Share (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Earnings Per Share [Abstract]        
Number of stock awards outstanding but not included in the computation of diluted earnings per common share 1,556,671 675,214 1,698,735 1,432,789