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EARNINGS PER SHARE (Tables)
 6 Months Ended
Jun. 30, 2019
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
 
Six Months Ended
 
June 30,
 
June 30,
 
2019
 
2018
 
2019
 
2018
Numerator for basic and diluted earnings per share:
 
 
 
 
 
 
 
Net income
$
36,244

 
$
30,747

 
$
37,220

 
$
18,116

 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Basic shares outstanding
55,875

 
56,410

 
55,861

 
56,304

Dilutive effect of stock-based compensation awards
191

 
95

 
140

 
95

Dilutive shares outstanding
56,066


56,505


56,001

 
56,399

 
 
 
 
 
 
 
 
Basic income per share:
$
0.65

 
$
0.55

 
$
0.67

 
$
0.32

 
 

 
 

 
 

 
 

Diluted income per share:
$
0.65

 
$
0.54

 
$
0.66

 
$
0.32