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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Summary of Per Common Share Data and Amounts
The following table presents a summary of per common share data and amounts for the periods indicated.
 
Three months ended
September 30,
 
Nine months ended
September 30,
(in thousands, except per share data)
2018
 
2017
 
2018
 
2017
Net income as reported
$
22,516

 
$
16,315

 
$
65,688

 
$
40,661

 
 
 
 
 
 
 
 
Weighted average common shares outstanding
23,148

 
23,324

 
23,129

 
22,914

Additional dilutive common stock equivalents
181

 
250

 
211

 
295

Weighted average diluted common shares outstanding
23,329

 
23,574

 
23,340

 
23,209

 
 
 
 
 
 
 
 
Basic earnings per common share:
$
0.97

 
$
0.70

 
$
2.84

 
$
1.77

Diluted earnings per common share:
$
0.97

 
$
0.69

 
$
2.81

 
$
1.75