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Earnings Per Share - Narrative (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Earnings Per Share [Abstract]        
Antidilutive securities excluded from computation of earnings per share, amount (shares) 0 0 0 0