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Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table presents the computations for basic and diluted earnings per common share:
 
 
Years Ended December 31,
 
2012
 
2011
 
2010
 
(in thousands, except shares and per share amounts)
Numerator:
 
 
 
 
 
Net income
$
385,721

 
$
39,133

 
$
(756,143
)
Denominator:
 
 
 
 
 
Weighted average shares outstanding - basic
62,122,862

 
61,955,659

 
14,253,869

Dilutive securities outstanding
649,217

 
275,549

 
0

Weighted average shares outstanding - diluted
62,772,079

 
62,231,208

 
14,253,869

Earnings per share - basic
$
6.21

 
$
0.63

 
$
(53.05
)
Earnings per share - diluted
$
6.14

 
$
0.63

 
$
(53.05
)
Antidilutive securities outstanding (weighted average):
 
 
 
 
 
Stock options
13,792

 
16,511

 
20,700

Warrants
0

 
0

 
954,754

Restricted shares
230

 
4,728

 
20,754

Total antidilutive securities outstanding
14,022

 
21,239

 
996,208