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Net Income per Common Share
 3 Months Ended
Mar. 31, 2021
Earnings Per Share [Abstract]  
Net Income per Common Share Net Income per Common Share
The calculation of net income per common share for the three months ended March 31, 2021 and 2020 (unaudited) was as follows:
Three Months Ended March 31,
(dollars and shares in thousands, except per share data)20212020
Basic:
Net income$43,469 $23,123 
Average common shares outstanding31,870 32,850 
Basic net income per common share$1.36 $0.70 
Diluted:
Net income$43,469 $23,123 
Average common shares outstanding31,870 32,850 
Adjustment for common share equivalents53 25 
Average common shares outstanding-diluted31,923 32,875 
Diluted net income per common share$1.36 $0.70 
Anti-dilutive shares4 26