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EARNINGS PER SHARE (Tables)
 6 Months Ended
Jun. 30, 2013
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,
 
 
2013
 
2012
 
2013
 
2012
Numerator for basic and diluted earnings per share:
 
 

 
 

 
 

 
 

Net income
 
$
22,902

 
$
23,426

 
$
33,404

 
$
55,441

 
 
 
 
 
 
 
 
 
Denominator:
 
 

 
 

 
 

 
 

Basic shares outstanding
 
60,550

 
53,308

 
60,507

 
53,268

Dilutive effect of equity-based compensation awards
 
137

 
197

 
151

 
229

Dilutive shares outstanding
 
60,687

 
53,505

 
60,658

 
53,497

 
 
 
 
 
 
 
 
 
Basic earnings per share:
 
$
0.38

 
$
0.44

 
$
0.55

 
$
1.04

 
 
 

 
 

 
 

 
 

Diluted earnings per share:
 
$
0.38

 
$
0.44

 
$
0.55

 
$
1.04