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Earnings Per Common Share - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Earnings Per Share [Abstract]        
Antidilutive shares excluded from computation of diluted EPS (in shares) 0 355,434 0 355,434