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Net Earnings Per Share
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Net Earnings Per Share
Net Earnings Per Share
The following table sets forth the reconciliation of the numerator and denominator utilized in the computation of basic and diluted earnings per share (in thousands):
 
 
Three Months Ended
March 31,
 
2013
 
2012
Numerator for earnings per share:
 
 
 
Earnings from continuing operations
$
51,636

 
$
48,825

Loss from discontinued operations
—

 
(686
)
Net earnings for basic and diluted earnings per share
$
51,636

 
$
48,139

 
 
 
 
Denominator for earnings per share:
 
 
 
Weighted average number of common shares outstanding
144,629

 
154,485

Assumed exercises of stock options and vesting of restricted stock awards, net of shares assumed reacquired under the treasury stock method
1,662

 
2,487

Weighted average diluted shares outstanding
146,291

 
156,972


The effect of stock-based compensation awards for the three months ended March 31, 2013 and 2012, which aggregated 877,000 shares and 470,000 shares, respectively, has been excluded for purposes of calculating diluted earnings per share since including such stock-based compensation awards would have been anti-dilutive.