Income (Loss) Per Share (Tables)
6 Months Ended
Jun. 30, 2015
Earnings Per Share [Abstract]  
Schedule of Reconciliation of the Numerator and Denominator Used in the Computation of Basic and Diluted Income Per Share
The table below is a reconciliation of the numerator and denominator used in the computation of basic and diluted income (loss) per share (dollars in thousands):
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
2015
 
2014
 
2015
 
2014
Basic and diluted income (loss):
 
 
 
 
 
 
 
(Loss) income from continuing operations
$
(2,293
)
 
$
(88,902
)
 
$
11,468

 
$
(79,432
)
Gain (loss) on disposition of assets
62,690

 
(1,290
)
 
74,026

 
432

Less: income attributable to unvested restricted stock
(225
)
 
(334
)
 
(434
)
 
(667
)
Income (loss) used in basic and diluted income (loss) per share from continuing operations
60,172

 
(90,526
)
 
85,060

 
(79,667
)
Income from discontinued operations
494

 
371

 
721

 
3,418

Net income (loss) attributable to common stockholders used in basic and diluted income (loss) per share
$
60,666

 
$
(90,155
)
 
$
85,781

 
$
(76,249
)
 
 
 
 
 
 
 
 
Basic weighted average shares of common stock outstanding:
 
 
 
 
 
 
 
Weighted average shares of common stock outstanding
437,921,663

 
383,810,017

 
425,129,740

 
377,209,471

Less: unvested weighted average shares of restricted stock
(1,302,525
)
 
(2,034,814
)
 
(1,240,502
)
 
(1,943,238
)
Weighted average number of shares outstanding used in basic income (loss) per share
436,619,138

 
381,775,203

 
423,889,238

 
375,266,233

Net income (loss) per share attributable to common stockholders—basic
$
0.14

 
$
(0.24
)
 
$
0.20

 
$
(0.20
)
 
 
 
 
 
 
 
 
Diluted weighted average shares of common stock outstanding: (1)
 
 
 
 
 
 
 
Unvested performance shares
301,007

 

 
448,691

 

Stock options
3,610

 

 
5,303

 

Weighted average number of shares of common stock used in diluted income (loss) per share
436,923,755

 
381,775,203

 
424,343,232

 
375,266,233

Net income (loss) per share attributable to common stockholders—diluted
$
0.14

 
$
(0.24
)
 
$
0.20

 
$
(0.20
)
 
 
 
 
 
 
 
 
Potentially dilutive shares of common stock
 
 
 
 
 
 
 
Unvested shares of restricted stock
452,791

 
911,962

 
455,024

 
800,773

Unvested performance shares

 
708,823

 

 
703,262

Stock options

 
4,416

 

 
4,830

Total
452,791

 
1,625,201

 
455,024

 
1,508,865


(1)  Assumes the most dilutive issuance of potentially issuable shares between the two-class and treasury stock method unless the result would be anti-dilutive.