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EARNINGS PER SHARE
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
EARNINGS PER SHARE
EARNINGS PER SHARE
The following are computations of basic and diluted earnings per share (in thousands except for per share amounts):
 
Years Ended December 31,
 
2012
 
2011
 
2010
Numerator for basic and diluted earnings per share:
 
 
 
 
 
Income from continuing operations
$
129,674

 
$
127,252

 
$
127,721

Income from discontinued operations, net of tax
—

 
—

 
2,794

Net income
$
129,674

 
$
127,252

 
$
130,515

Denominator:
 
 
 
 
 
  Basic shares outstanding
53,884

 
52,961

 
52,622

  Dilutive effect of equity-based compensation awards
195

 
363

 
310

  Dilutive shares outstanding
54,079

 
53,324

 
52,932

Basic earnings per share
 
 
 
 
 
Income from continuing operations
$
2.41

 
$
2.40

 
$
2.43

Income from discontinued operations, net of tax
—

 
—

 
0.05

Net income
$
2.41

 
$
2.40

 
$
2.48

Diluted earnings per share
 
 
 
 
 
Income from continuing operations
$
2.40

 
$
2.39

 
$
2.42

Income from discontinued operations, net of tax
—

 
—

 
0.05

Net income
$
2.40

 
2.39

 
2.47


For the year ended December 31, 2012, the dilutive effect of all then outstanding options, restricted stock and performance awards is included in the EPS calculations above except for 65,000 outstanding performance stock awards for which the performance criteria were not attained at that time. For the years ended December 31, 2011 and 2010, there were no anti-dilutive securities.
All shares and per share amounts included in the above table have been adjusted for the two-for-one stock split on July 26, 2011.