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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Schedule of Weighted Average Number of Shares Average shares used in computing the basic and diluted earnings per share are as follows:
 December 31,
 202120202019
Basic computation51,709,229 50,559,208 50,428,560 
Dilutive effect of
Performance and restricted share awards(1)
111,940 145,181 323,298 
Forward equity sale51,057 — — 
Diluted computation51,872,226 50,704,389 50,751,858 
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(1) Performance share awards are included in diluted weighted average number of shares outstanding based upon what would be issued if the end of the most recent reporting period was the end of the term of the award.

As of December 31, 2021, there were 77,856 shares from performance and restricted share awards which were antidilutive and excluded from the earnings per share calculations.