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Weighted Average Common Shares
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Weighted Average Common Shares Weighted Average Common Shares
The following table provides a reconciliation of the weighted average number of common shares used in the calculation of basic and diluted earnings per share (in thousands):
 Year Ended December 31,
 202120202019
Weighted average common shares for basic earnings per share237,967 237,739 237,604 
Effect of dilutive securities: restricted share awards— — — 
Weighted average common shares for diluted earnings per share (1)
237,967 237,739 237,604 
(1) For the years ended December 31, 2021, 2020 and 2019, 60, 223 and 36, respectively, of our unvested common shares were not included in the calculation of diluted earnings per share because to do so would have been antidilutive.