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Earnings Per Common Share
 3 Months Ended
Mar. 31, 2023
Earnings Per Share [Abstract]  
Earnings Per Common Share Earnings Per Common Share Earnings per common share are calculated utilizing the two-class method. Basic earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding. Diluted earnings per common share are calculated by dividing the sum of distributed earnings to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of common shares outstanding adjusted for the dilutive effect of common stock awards (outstanding stock options and unvested restricted stock awards). Presented below are the calculations for basic and diluted earnings per common share:
 Three Months Ended Mar 31,
 ($ in thousands, except per share data)20232022
Net income$103,360 $74,262 
Preferred stock dividends(2,875)(2,875)
Net income available to common equity$100,485 $71,387 
Common shareholder dividends(31,808)(30,372)
Unvested share-based payment awards(205)(211)
Undistributed earnings$68,472 $40,804 
Undistributed earnings allocated to common shareholders$68,086 $40,548 
Undistributed earnings allocated to unvested share-based payment awards386 256 
Undistributed earnings$68,472 $40,804 
Basic
Distributed earnings to common shareholders$31,808 $30,372 
Undistributed earnings allocated to common shareholders68,086 40,548 
Total common shareholders earnings, basic$99,894 $70,920 
Diluted
Distributed earnings to common shareholders$31,808 $30,372 
Undistributed earnings allocated to common shareholders68,086 40,548 
Total common shareholders earnings, diluted$99,894 $70,920 
Weighted average common shares outstanding149,763 148,781 
Effect of dilutive common stock awards1,365 1,711 
Diluted weighted average common shares outstanding151,128 150,492 
Basic earnings per common share$0.67 $0.48 
Diluted earnings per common share$0.66 $0.47 
Approximately 2 million anti-dilutive common stock options were excluded from the earnings per common share calculation for both the three months ended March 31, 2023 and 2022