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Net Income Per Common Share (Tables)
3 Months Ended
Mar. 31, 2020
Earnings Per Share [Abstract]  
Net Income Per Common Share [Table Text Block]
The following table sets forth the computation of basic and diluted net income per common share:

 
Three Months Ended
March 31
 
2020
 
2019
 
(thousands, except per-share data)
Net income
$
12,200

 
$
11,389

Weighted average common shares outstanding during the period (for basic calculation)
39,163

 
38,884

Dilutive effect of other potential common shares
242

 
319

Weighted average common shares and potential common shares (for diluted calculation)
39,405

 
39,203

 
 
 
 
Net income per common share - Basic
$
0.31

 
$
0.29

Net income per common share - Diluted
$
0.31

 
$
0.29