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Per Share Data (Tables)
 6 Months Ended
Jun. 30, 2021
Earnings Per Share [Abstract]  
Calculation Of Basic And Diluted Earnings Per Share The following table presents information necessary to calculate basic and diluted earnings per share for the periods indicated:
 Three Months Ended
June 30,		Six Months Ended
June 30,
(in thousands, except per share amounts)2021202020212020
Earnings per common share calculation – basic
Income from continuing operations attributable to common shareholders$30,179 $16,477 $61,526 $59,761 
Amount allocated to participating securities(50)(35)(82)(134)
Net income attributable to common shareholders – basic$30,129 $16,442 $61,444 $59,627 
Total earnings per common share – basic$0.30 $0.17 $0.61 $0.60 
Weighted average number of common shares outstanding – basic100,701 99,399 100,127 99,348 
Earnings per common share calculation – diluted
Net income attributable to common shareholders – diluted$30,129 $16,442 $61,444 $59,627 
Total earnings per common share – diluted$0.30 $0.17 $0.61 $0.60 
Weighted average number of common shares outstanding – basic100,701 99,399 100,127 99,348 
Incremental shares issuable from assumed conversion of:
Common share options and share awards granted66 9 70 46 
Weighted average number of common shares outstanding – diluted100,767 99,408 100,197 99,394