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Earnings (Loss) Per Share (Tables)
 6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Reconciliation of Numerators and Denominators of Basic and Diluted Earnings Per Share Computations
The following is a reconciliation of the numerators and denominators of the basic and diluted earnings (loss) per share computations shown on the consolidated statements of comprehensive income (loss) (dollars in thousands):
 
 
For the Three Months  
 Ended June 30,
 
For the Six Months 
 Ended June 30,
 
 
2014
 
2013
 
2014
 
2013
Basic earnings (loss) per share
 
 
 
 
 
 
 
 
Net income (loss)
 
$
(12,929
)
 
$
143,232

 
$
4,448

 
$
170,981

Less: Net income allocated to unvested participating securities
 
—

 
(2,351
)
 
(34
)
 
(2,831
)
Net income (loss) available to common stockholders (numerator)
 
$
(12,929
)
 
$
140,881

 
$
4,414

 
$
168,150

 
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding (denominator)
 
37,673

 
36,925

 
37,552

 
36,902

 
 
 
 
 
 
 
 
 
Basic earnings (loss) per share
 
$
(0.34
)
 
$
3.82

 
$
0.12

 
$
4.56

 
 
 
 
 
 
 
 
 
Diluted earnings (loss) per share
 
 
 
 
 
 
 
 
Net income (loss)
 
$
(12,929
)
 
$
143,232

 
$
4,448

 
$
170,981

Less: Net income allocated to unvested participating securities
 
—

 
(2,310
)
 
(33
)
 
(2,778
)
Net income (loss) available to common stockholders (numerator)
 
$
(12,929
)
 
$
140,922

 
$
4,415

 
$
168,203

 
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding
 
37,673

 
36,925

 
37,552

 
36,902

Add: Effect of dilutive stock options, non-participating securities, and convertible notes
 
—

 
660

 
522

 
711

Diluted weighted-average common shares outstanding (denominator)
 
37,673

 
37,585

 
38,074

 
37,613

 
 
 
 
 
 
 
 
 
Diluted earnings (loss) per share
 
$
(0.34
)
 
$
3.75

 
$
0.12

 
$
4.47