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EARNINGS PER SHARE (Tables)
 3 Months Ended
Mar. 31, 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
 
 
March 31,
 
 
2013
 
2012
Numerator for basic and diluted earnings per share:
 
 

 
 

Net income
 
$
10,502

 
$
32,015

 
 
 
 
 
Denominator:
 
 

 
 

Basic shares outstanding
 
60,464

 
53,227

Dilutive effect of equity-based compensation awards
 
166

 
261

Dilutive shares outstanding
 
60,630

 
53,488

 
 
 
 
 
Basic earnings per share:
 
$
0.17

 
$
0.60

 
 
 

 
 

Diluted earnings per share:
 
$
0.17

 
$
0.60