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Earnings per Share (Tables)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Components of Calculation of Basic and Diluted 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:
 
Year Ended December 31,
 
2012
 
2011
 
2010
Loss from continuing operations
$
(104,589
)
 
$
(132,915
)
 
$
(65,327
)
Income from discontinued operations, net of tax 1
—

 
—

 
33,448

Gain on sale of discontinued operations, net of tax
—

 
—

 
51,546

Less net income attributable to noncontrolling interests
—

 
—

 
(28,090
)
Loss attributable to Penn Virginia Corporation
(104,589
)
 
(132,915
)
 
(8,423
)
Less: Preferred stock dividends
(1,687
)
 
—

 
—

Loss attributable to common shareholders - Basic
(106,276
)
 
(132,915
)
 
(8,423
)
Add: Preferred stock dividends 2
—

 
—

 
—

Loss attributable to common shareholders - Diluted
$
(106,276
)
 
$
(132,915
)
 
$
(8,423
)
 
 
 
 
 
 
Weighted-average shares - Basic
47,919

 
45,784

 
45,553

Effect of dilutive securities 3
—

 
—

 
—

Weighted-average shares - Diluted
47,919

 
45,784

 
45,553

_______________________
1 For purposes of determining earnings per share, net income attributable to noncontrolling interests is applied against income from discontinued operations as both are attributable to PVG's operations.
2 Preferred stock dividends were excluded for diluted earnings per share as the assumed conversion of the 6% Preferred Stock would have been anti-dilutive.
3 For 2012, 2011 and 2010, approximately 19.2 million, 0.1 million and 0.2 million potentially dilutive securities, including the 6% Preferred Stock, 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.