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Earnings Per Common Share (Tables)
 12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Calculation of Earnings Per Common Share
The following table presents the calculation of earnings per common share:
(Dollars and shares in thousands, except per share amounts)
 
 
 
 
 
Years ended December 31,
2019

 
2018

 
2017

Earnings per common share - basic:
 
 
 
 
 
Net income

$69,118

 

$68,432

 

$45,925

Less dividends and undistributed earnings allocated to participating securities
(139
)
 
(144
)
 
(108
)
Net income available to common shareholders

$68,979

 

$68,288

 

$45,817

Weighted average common shares
17,331

 
17,272

 
17,207

Earnings per common share - basic

$3.98

 

$3.95

 

$2.66

Earnings per common share - diluted:
 
 
 
 
 
Net income

$69,118

 

$68,432

 

$45,925

Less dividends and undistributed earnings allocated to participating securities
(139
)
 
(144
)
 
(108
)
Net income available to common shareholders

$68,979

 

$68,288

 

$45,817

Weighted average common shares
17,331

 
17,272

 
17,207

Dilutive effect of common stock equivalents
83

 
119

 
131

Weighted average diluted common shares
17,414

 
17,391

 
17,338

Earnings per common share - diluted

$3.96

 

$3.93

 

$2.64