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Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2017
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share
Year Ended December 31, 2016
 
Income
(Numerator)
 
Shares
(Denominator)
 
Per Share
Amount
 
 
(in thousands, except per share amounts)
Basic earnings per share
 
 
 
 
 
 
Net income available to common shareholders
 
$
41,518

 
42,912

 
$
0.97

Less: earnings allocated to participating securities
 
(396
)
 

 
(0.01
)
Net income available to common shareholders
 
$
41,122

 
42,912

 
$
0.96

Effect of dilutive securities
 
 
 
 
 
 
Stock options and restricted stock
 

 
202

 
(0.01
)
Diluted earnings per share
 
 
 
 
 
 
Net income available to common shareholders plus assumed conversions
 
$
41,122

 
43,114

 
$
0.95

Year Ended December 31, 2015
 
Income
(Numerator)
 
Shares
(Denominator)
 
Per Share
Amount
 
 
(in thousands, except per share amounts)
Basic earnings per share
 
 
 
 
 
 
Net income available to common shareholders
 
$
32,481

 
37,844

 
$
0.86

Less: earnings allocated to participating securities
 
(263
)
 

 
(0.01
)
Net income available to common shareholders
 
$
32,218

 
37,844

 
$
0.85

Effect of dilutive securities
 
 
 
 
 
 
Stock options and restricted stock
 

 
149

 

Diluted earnings per share
 
 
 
 
 
 
Net income available to common shareholders plus assumed conversions
 
$
32,218

 
$
37,993

 
$
0.85

The following tables present the computation of basic and diluted earnings per share for the periods presented.
 
Year Ended December 31, 2017
 
Income
(Numerator)
 
Shares
(Denominator)
 
Per Share
Amount
 
 
(in thousands, except per share amounts)
Basic earnings per share
 
 
 
 
 
 
Net income available to common shareholders
 
$
52,580

 
47,438

 
$
1.11

Less: earnings allocated to participating securities
 
(480
)
 

 
(0.01
)
Net income available to common shareholders
 
$
52,100

 
47,438

 
$
1.10

Effect of dilutive securities
 
 
 
 
 
 
Stock options and restricted stock
 

 
236

 
(0.01
)
Diluted earnings per share
 
 
 
 
 
 
Net income available to common shareholders plus assumed conversions
 
$
52,100

 
47,674

 
$
1.09