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EARNINGS PER SHARE
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
EARNINGS PER SHARE
EARNINGS PER SHARE     
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


For the three months ended September 30, 2018 and September 30, 2017, the dilutive effect of all then outstanding restricted stock and performance awards is included in the EPS calculation above except for 304,644 and 301,300, respectively, of performance stock awards for which the performance criteria were not attained at that time and 6,565 and 3,724, respectively, of restricted stock awards which were antidilutive at that time.
For the nine months ended September 30, 2018 and September 30, 2017, the dilutive effect of all then outstanding restricted stock and performance awards is included in the EPS calculation above except for 304,644 and 301,300, respectively, of performance stock awards for which the performance criteria were not attained at that time and 91,743 and 19,485, respectively, of restricted stock awards which were antidilutive at that time.