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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2015
Earnings Per Share [Abstract]  
Computation of basic and diluted 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
 
Six Months Ended
 
 
June 30,
 
June 30,
 
 
2015
 
2014
 
2015
 
2014
Numerator:
 
 
 
 
 
 
 
 
Income from continuing operations for calculating basic and diluted earnings per share
 
$
13,339

 
$
16,015

 
$
30,127

 
$
38,969

Loss from discontinued operations
 
—

 
—

 
—

 
(272
)
Net income for calculating basic and diluted earnings per share
 
$
13,339

 
$
16,015

 
$
30,127

 
$
38,697

 
 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
 
Weighted-average common shares for calculating basic earnings per share
 
28,196

 
28,938

 
28,299

 
28,945

Effect of dilutive securities:
 
 
 
 
 
 
 
 
Stock options and nonvested awards
 
215

 
403

 
216

 
396

Weighted-average common shares for calculating diluted earnings per share
 
28,411

 
29,341

 
28,515

 
29,341

 
 
 
 
 
 
 
 
 
Basic earnings per share:
 
 
 
 
 
 
 
 
Income from continuing operations
 
$
0.47

 
$
0.55

 
$
1.06

 
$
1.35

Loss from discontinued operations
 
—

 
—

 
—

 
(0.01
)
Net income per basic share
 
$
0.47

 
$
0.55

 
$
1.06

 
$
1.34

 
 
 
 
 
 
 
 
 
Diluted earnings per share:
 
 
 
 
 
 
 
 
Income from continuing operations
 
$
0.47

 
$
0.55

 
$
1.06

 
$
1.33

Loss from discontinued operations
 
—

 
—

 
—

 
(0.01
)
Net income per diluted share
 
$
0.47

 
$
0.55

 
$
1.06

 
$
1.32