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EARNINGS PER SHARE (Tables)
 12 Months Ended
Dec. 31, 2011
Earnings Per Share [Abstract]  
Reconciliation of basic and diluted earnings per share computations
The following is a reconciliation of basic and diluted earnings per share computations (in thousands except for per share amounts):
 
Years Ended December 31,
 
2011
 
2010
 
2009
Numerator for basic and diluted earnings per share:
 
 
 
 
 
Income from continuing operations
$
127,252

 
$
127,721

 
$
35,247

Income from discontinued operations, net of tax
—

 
2,794

 
1,439

Net income
$
127,252

 
$
130,515

 
$
36,686

Denominator:
 
 
 
 
 
  Basic shares outstanding
52,961

 
52,622

 
49,633

  Dilutive effect of equity-based compensation awards
363

 
310

 
233

  Dilutive shares outstanding
53,324

 
52,932

 
49,866

Basic earnings per share
 
 
 
 
 
Income from continuing operations
2.40

 
$
2.43

 
$
0.71

Income from discontinued operations, net of tax
—

 
0.05

 
0.03

Net income
2.40

 
$
2.48

 
$
0.74

Diluted earnings per share
 
 
 
 
 
Income from continuing operations
$
2.39

 
$
2.42

 
$
0.71

Income from discontinued operations, net of tax
—

 
0.05

 
0.03

Net income
$
2.39

 
2.47

 
0.74