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Net Income per Common Share (Tables)
12 Months Ended
Dec. 31, 2017
Earnings Per Common Share  
Schedule of net income per common share

The calculation of net income per common share for the years ended December 31 was as follows:

 

(dollars and shares in thousands, except per share data)   2017   2016   2015  
               
Basic:              
Net income available to common shareholders   $ 100,232   $ 97,707   $ 83,566  
Average common shares outstanding   34,139   33,587   32,836  
Basic net income per common share   $ 2.94   $ 2.91   $ 2.54  
               
Diluted:              
Net income available to common shareholders   $ 100,232   $ 97,707   $ 83,566  
Average common shares outstanding   34,139   33,587   32,836  
Adjustment for common share equivalents   182   594   643  
Average common shares outstanding-diluted   34,321   34,181   33,479  
Diluted net income per common share   $ 2.92   $ 2.86   $ 2.50  
               
Anti-dilutive shares     7   5