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EARNINGS PER SHARE (Tables)
 12 Months Ended
Dec. 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):
 
Years Ended December 31,
 
2013
 
2012
 
2011
Numerator for basic and diluted earnings per share:
 
 
 
 
 
Net income
$
95,566

 
$
129,674

 
$
127,252

Denominator:
 
 
 
 
 
  Basic shares outstanding
60,574

 
53,884

 
52,961

  Dilutive effect of equity-based compensation awards
154

 
195

 
363

  Dilutive shares outstanding
60,728

 
54,079

 
53,324


 
 
 
 
 
Basic earnings per share
$
1.58

 
$
2.41

 
$
2.40

Diluted earnings per share
$
1.57

 
$
2.40

 
$
2.39