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Net Income (Loss) Per Share Attributable To Common Stockholders (Tables)
 12 Months Ended
Dec. 31, 2013
Earnings Per Share [Abstract]  
Reconciliation Of Earnings Attributable To Common Stockholders, Basic And Diluted
The following table is a reconciliation of the Company's net income (loss) attributable to common stockholders to basic net income (loss) attributable to common stockholders and to diluted net income (loss) attributable to common stockholders for the years ended December 31, 2013, 2012 and 2011:
 
 
Year Ended December 31, 2013
 
Continuing
Operations
 
Discontinued
Operations
 
Total
 
(in thousands)
Net loss attributable to common stockholders
$
(388,809
)
 
$
(449,605
)
 
$
(838,414
)
Participating basic earnings (a)
(60
)
 
(70
)
 
(130
)
Basic loss attributable to common stockholders
(388,869
)
 
(449,675
)
 
(838,544
)
Reallocation of participating earnings (a)
—

 
—

 
—

Diluted loss attributable to common stockholders
$
(388,869
)
 
$
(449,675
)
 
$
(838,544
)
 
Year Ended December 31, 2012
 
Continuing
Operations
 
Discontinued
Operations
 
Total
 
(in thousands)
Net income (loss) attributable to common stockholders
$
496,495

 
$
(304,210
)
 
$
192,285

Participating basic earnings (a)
(2,160
)
 
(869
)
 
(3,029
)
Basic income (loss) attributable to common stockholders
494,335

 
(305,079
)
 
189,256

Reallocation of participating earnings (a)
115

 
46

 
161

Diluted income (loss) attributable to common stockholders
$
494,450

 
$
(305,033
)
 
$
189,417

 
 
Year Ended December 31, 2011
 
Continuing
Operations
 
Discontinued
Operations
 
Total
 
(in thousands)
Net income attributable to common stockholders
$
360,365

 
$
474,124

 
$
834,489

Participating basic earnings (a)
(6,554
)
 
(8,624
)
 
(15,178
)
Basic net income attributable to common stockholders
353,811

 
465,500

 
819,311

Reallocation of participating earnings (a)
166

 
219

 
385

Diluted income attributable to common stockholders
$
353,977

 
$
465,719

 
$
819,696

 ______________________
(a)
Unvested restricted stock awards and Pioneer Southwest phantom unit awards (prior to the December 2013 Pioneer Southwest merger) represent participating securities because they participate in nonforfeitable dividends or distributions with the common equity owners of the Company or Pioneer Southwest, as applicable. Participating share- or unit-based earnings represent the distributed and undistributed earnings of the Company attributable to the participating securities. Unvested restricted stock awards and phantom unit awards do not participate in undistributed net losses as they are not contractually obligated to do so.
Reconciliation Of Basic To Diluted Weighted Average Common Shares Outstanding
The following table is a reconciliation of basic weighted average common shares outstanding to diluted weighted average common shares outstanding for the years ended December 31, 2013, 2012 and 2011:
 
 
Year Ended December 31,
 
2013 (a)
 
2012
 
2011
 
(in thousands)
Weighted average common shares outstanding:
 
 
 
 
 
Basic
136,130

 
122,966

 
116,904

Dilutive common stock options (b)
—

 
183

 
190

Contingently issuable—performance shares
—

 
180

 
424

Convertible Senior Notes dilution (c)
—

 
2,991

 
1,697

Diluted
136,130

 
126,320

 
119,215

______________________
(a)
The following common share equivalents were excluded from the weighted average diluted shares for the year ended December 31, 2013 because they would have been anti-dilutive to the loss recorded for the period: (i) 135,190 outstanding options to purchase the Company's common stock, (ii) 200,360 common shares attributable to unvested performance awards and (iii) 1,087,401 common shares related to the 2013 redemption of the Convertible Senior Notes, representing the weighted average portion of the year that is not included in the basic weighted average common shares outstanding.
(b)
Options to purchase 129,918 shares of the Company's common stock were excluded from the diluted income per share calculations for the year ended December 31, 2012 because they would have been anti-dilutive to the calculation.
(c)
Weighted average common shares outstanding have been increased to reflect the dilutive effect that would have resulted if the Convertible Senior Notes had qualified for and been converted during the years ended December 31, 2012 and 2011, respectively.