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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Computation of Earnings Per Share
The following schedule shows the Company’s earnings per share calculations for the periods presented:
 
For the Three Months Ended September 30,
 
For the Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
 
(in thousands, except per share data)
 
(in thousands, except per share data)
Net income available to common shareholders
$
16,758

 
$
13,723

 
$
47,851

 
$
39,405

Less: earnings allocated to participating securities
153

 
122

 
440

 
362

Net income allocated to common shareholders
$
16,605

 
$
13,601

 
$
47,411

 
$
39,043

Weighted average number of common shares outstanding - basic
47,605

 
47,466

 
47,570

 
47,429

Share-based plans
183

 
226

 
194

 
231

Weighted average number of common shares outstanding - diluted
47,788

 
47,692

 
47,764

 
47,660

Basic earnings per share
$
0.35

 
$
0.29

 
$
1.00

 
$
0.82

Diluted earnings per share
$
0.35

 
$
0.29

 
$
0.99

 
$
0.82