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Earnings Per Share
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
Earnings Per Share

The following table sets forth the computation of basic and diluted earnings per share (unaudited, in thousands, except per share data):
 
 
Three Months Ended
 
 
March 31,
 
 
2013
 
2012
Numerator:
 
 
 
 
Income from continuing operations for calculating basic and diluted earnings per share
 
$
20,264

 
$
17,452

Income from discontinued operations
 
—

 
60

Net income for calculating basic and diluted earnings per share
 
$
20,264

 
$
17,512

 
 
 
 
 
Denominator:
 
 
 
 
Weighted-average common shares for calculating basic earnings per share
 
29,313

 
29,580

Effect of dilutive securities:
 
 
 
 
Stock options, warrants and nonvested awards
 
642

 
773

Weighted-average common shares for calculating diluted earnings per share
 
29,955

 
30,353

 
 
 
 
 
Basic earnings per share:
 
 
 
 
Income from continuing operations
 
$
0.69

 
$
0.59

Income from discontinued operations
 
—

 
—

Net income per basic share
 
$
0.69

 
$
0.59

 
 
 
 
 
Diluted earnings per share:
 
 
 
 
Income from continuing operations
 
$
0.68

 
$
0.57

Income from discontinued operations
 
—

 
0.01

Net income per diluted share
 
$
0.68

 
$
0.58