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Earnings Per Common Share
12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Earnings Per Common Share Earnings Per Common Share
See Note 1 for the Corporation’s accounting policy on earnings per common share. Presented below are the calculations for basic and diluted earnings per common share:
 For the Years Ended December 31,
 ($ in Thousands, except per share data)202120202019
Net income$350,994 $306,771 $326,790 
Preferred stock dividends(17,111)(18,358)(15,202)
Net income available to common equity$333,883 $288,413 $311,587 
Common shareholder dividends$(115,212)$(111,291)$(111,091)
Unvested share-based payment awards(849)(732)(713)
Undistributed earnings$217,822 $176,390 $199,784 
Undistributed earnings allocated to common shareholders$216,299 $175,134 $198,424 
Undistributed earnings allocated to unvested share-based payment awards1,523 1,256 1,360 
Undistributed earnings$217,822 $176,390 $199,784 
Basic
Distributed earnings to common shareholders$115,212 $111,291 $111,091 
Undistributed earnings allocated to common shareholders216,299 175,134 198,424 
Total common shareholders earnings, basic$331,510 $286,425 $309,514 
Diluted
Distributed earnings to common shareholders$115,212 $111,291 $111,091 
Undistributed earnings allocated to common shareholders216,299 175,134 198,424 
Total common shareholders earnings, diluted$331,510 $286,425 $309,514 
Weighted average common shares outstanding150,773 153,005 160,534 
Effect of dilutive common stock awards1,214 637 1,398 
Diluted weighted average common shares outstanding151,987 153,642 161,932 
Basic earnings per common share$2.20 $1.87 $1.93 
Diluted earnings per common share$2.18 $1.86 $1.91 
Anti-dilutive common stock options of 3 million at December 31, 2021, 7 million at December 31, 2020, and 3 million December 31, 2019, were excluded from the earnings per common share calculation.