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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share, Basic and Diluted [Abstract]  
Basic and Diluted Earnings Per Share
The following table sets forth the computation of basic and diluted earnings per share:
 
For the Years Ended December 31,
(Dollars and shares in thousands)
2018
 
2017
 
2016
Numerator:
 
 
 
 
 
Net income
$
50,543

 
$
44,094

 
$
19,505

Net income allocated to unvested restricted stock
(333
)
 
(409
)
 
(167
)
Net income allocated to common shares
$
50,210

 
$
43,685

 
$
19,338

Denominator:
 
 
 
 
 
Weighted average shares outstanding
29,370

 
26,862

 
23,098

Average unvested restricted stock
(193
)
 
(256
)
 
(227
)
Denominator for basic earnings per share—weighted-average shares outstanding
29,177

 
26,606

 
22,871

Effect of dilutive securities—employee stock options
82

 
102

 
60

Denominator for diluted earnings per share—adjusted weighted-average shares outstanding
29,259

 
26,708

 
22,931

Basic earnings per share
$
1.72

 
$
1.64

 
$
0.85

Diluted earnings per share
$
1.72

 
$
1.64

 
$
0.84

Average anti-dilutive options excluded from computation of diluted earnings per share
319

 
169

 
280