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Earnings per Share
 6 Months Ended
Jun. 30, 2012
Earnings per Share
16.
Earnings per Share
 
The following table provides a reconciliation of the components used in the calculation of basic and diluted earnings per share for the periods presented:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2012
 
2011
 
2012
 
2011
Net loss
$
(5,638
)
 
$
(71,918
)
 
$
(17,537
)
 
$
(98,258
)
Weighted-average shares, basic
46,030

 
45,768

 
45,988

 
45,724

Effect of dilutive securities 1
—

 
—

 
—

 
—

Weighted-average shares, diluted
46,030

 
45,768

 
45,988

 
45,724

____________________________________________________________________________
1 For each of the three and six month periods ended June 30, 2012 and 2011, an amount less than 0.1 million of potentially dilutive securities, including the Convertible Notes, stock options, restricted stock and restricted stock units, had the effect of being anti-dilutive and were excluded from the calculation of diluted earnings per common share.