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Earnings Per Share - (Details) - shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Reconciliation of number of shares used in calculation of basic and diluted earnings per share    
Weighted average number of common shares outstanding 81,053,404 84,378,960
Effect of non-participatory equity compensation (in shares) 40,000 40,000
Weighted average number of common shares outstanding, including effect of dilutive securities 81,093,404 84,418,960