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Earnings Per Share
 9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Share
EARNINGS PER SHARE
The following is a reconciliation of the numerator and denominator used for the computation of basic and diluted net income (loss) per common share.
 
 
For the Three Months Ended
September 30,
 
For the Nine Months Ended
September 30,
 
2013
 
2012
 
2013
 
2012
 
 
 
(Restated)
 
 
 
(Restated)
 
 
 
 
 
 
 
 
 
(In thousands, except per share data)
Net income (loss) attributable to Quicksilver
$
10,577

 
$
(790,520
)
 
$
193,397

 
$
(1,804,107
)
Basic income allocable to participating securities (1)
(312
)
 
—

 
$
(5,111
)
 
$
—

Income (loss) available to shareholders
$
10,265

 
$
(790,520
)
 
$
188,286

 
$
(1,804,107
)
Weighted average common shares – basic
171,682

 
170,179

 
171,403

 
170,054

Effect of dilutive securities (2)
 
 
 
 
 
 
 
Share-based compensation awards
311

 
—

 
170

 
—

Weighted average common shares – diluted
171,993

 
170,179

 
171,573

 
170,054

Earnings (loss) per common share – basic
$
0.06

 
$
(4.65
)
 
$
1.10

 
$
(10.61
)
Earnings (loss) per common share – diluted
$
0.06

 
$
(4.65
)
 
$
1.10

 
$
(10.61
)

(1) 
Restricted share awards that contain nonforfeitable rights to dividends are participating securities and, therefore, should be included in computing earnings using the two-class method. Participating securities, however, do not participate in undistributed net losses because there is no contractual obligation to do so.
(2) 
For the three months ended September 30, 2013, 6.2 million shares associated with our stock options and 0.2 million shares associated with our unvested restricted stock units were antidilutive; therefore, excluded from the diluted share calculation. For the three months ended September 30, 2012, 5.0 million shares associated with our stock options and 0.3 million shares associated with our unvested restricted stock units were antidilutive; therefore, excluded from the diluted share calculation. For the nine months ended September 30, 2013, 5.5 million shares associated with our stock options and 0.2 million shares associated with our unvested restricted stock units were antidilutive; therefore, excluded from the diluted share calculation. For the nine months ended September 30, 2012, 5.0 million shares associated with our stock options and 0.3 million shares associated with our unvested restricted stock units were antidilutive; therefore, excluded from the diluted share calculation.