Earnings Per Share - (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Reconciliation of number of shares used in calculation of basic and diluted earnings per share
Weighted average number of common shares outstanding	80,608,996	81,053,404
Effect of non-participatory equity compensation (in shares)	40,000	40,000
Weighted average number of common shares outstanding, including effect of dilutive securities	80,648,996	81,093,404