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EARNINGS PER SHARE (Tables)
 6 Months Ended
Jun. 30, 2018
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Earnings Per Share
The following table shows the computation of basic and diluted earnings per share:
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
(Dollars and shares in thousands, except per share data)
2018
 
2017
 
2018
 
2017
Numerator:
 
 
 
 
 
 
 
Net income
$
28,740

 
$
20,570

 
$
66,090

 
$
39,507

Denominator:
 
 
 
 
 
 
 
Weighted average basic shares
31,567

 
31,443

 
31,497

 
31,425

Dilutive potential common shares
697

 
869

 
729

 
899

Weighted average fully diluted shares
32,264

 
32,312

 
32,226

 
32,324

Earnings per share:
 
 
 
 
 
 
 
Basic
$
0.91

 
$
0.65

 
$
2.10

 
$
1.26

Diluted
$
0.89

 
$
0.64

 
$
2.05

 
$
1.22

Outstanding common stock equivalents having no dilutive effect
11

 
—

 
23

 
10