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Earnings Per Share (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Earnings Per Share [Abstract]        
Shares excluded from potentially dilutive securities (in shares) 2,554,729 1,201,900 2,554,729 1,257,991