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EARNINGS PER SHARE (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Reconciliation of basic and diluted earnings per share computations
The following are computations of basic and diluted earnings per share (in thousands except for per share amounts):
 
Three Months Ended
 
Nine Months Ended
 
September 30,
 
September 30,
 
2018
 
2017
 
2018
 
2017
Numerator for basic and diluted earnings per share:
 

 
 

 
 
 
 
Net income
$
31,089

 
$
12,058

 
$
49,205

 
$
16,545

 
 
 
 
 
 
 
 
Denominator:
 

 
 

 
 
 
 
Basic shares outstanding
56,059

 
57,033

 
56,222

 
57,149

Dilutive effect of equity-based compensation awards
232

 
162

 
138

 
131

Dilutive shares outstanding
56,291

 
57,195

 
56,360

 
57,280

 
 
 
 
 
 
 
 
Basic income per share:
$
0.55

 
$
0.21

 
$
0.88

 
$
0.29

 
 

 
 

 
 

 
 

Diluted income per share:
$
0.55

 
$
0.21

 
$
0.87

 
$
0.29