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Per Share Data (Tables)
 12 Months Ended
Dec. 31, 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:
 Year Ended December 31,
(in thousands, except per share amounts)202120202019
Earnings per common share calculation – basic
Income from continuing operations attributable to common shareholders
$303,907 $123,911 $219,623 
Amount allocated to participating securities(545)(261)(539)
Net income attributable to common shareholders – basic$303,362 $123,650 $219,084 
Total earnings per common share – basic
$2.97 $1.24 $2.23 
Weighted average number of common shares outstanding – basic101,999 99,385 98,460 
Earnings per common share calculation – diluted
Income from continuing operations attributable to common shareholders, net of amount allocated to participating securities
$303,362 $123,650 $219,084 
Income allocated to common units from continuing operations1,190 — 1,593 
Net income attributable to common shareholders – diluted$304,552 $123,650 $220,677 
Total earnings per common share – diluted
$2.96 $1.24 $2.22 
Weighted average number of common shares outstanding – basic101,999 99,385 98,460 
Incremental shares issuable from assumed conversion of:
Common share options and share awards granted87 53 119 
Common units743 — 805 
Weighted average number of common shares outstanding – diluted102,829 99,438 99,384