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Earnings Per Share - Additional information (Details) - shares
9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Earnings Per Share [Abstract]        
Shares excluded from the computation of diluted net income per share attributable to common stockholders (in shares) 1,150,860 0 0 0