| Earnings per Share | 
        
 |  
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 | 
 
   | 
For the Three Months Ended September 30,  | 
   | 
For the Nine Months Ended September 30,  | 
 
(in thousands, except per share data)  | 
2012  | 
   | 
2011  | 
   | 
2012  | 
   | 
2011  | 
 
Net income  | 
$  | 
74,514  | 
 
  | 
    | 
$  | 
104,185  | 
 
  | 
   | 
$  | 
3,316,457  | 
 
  | 
   | 
$  | 
355,624  | 
 
  | 
 
Less:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Allocation of income to Series B Preferred Stock  | 
(27,825  | 
)  | 
   | 
(42,550  | 
)  | 
   | 
(1,309,647  | 
)  | 
   | 
(145,355  | 
)  | 
 
Net income available to common stockholders for basic net income per common share  | 
46,689  | 
 
  | 
   | 
61,635  | 
 
  | 
   | 
2,006,810  | 
 
  | 
   | 
210,269  | 
 
  | 
 
Add back:  | 
   | 
   | 
   | 
   | 
   | 
   | 
   | 
 
Allocation of income to Series B Preferred Stock  | 
27,825  | 
 
  | 
   | 
42,550  | 
 
  | 
   | 
1,309,647  | 
 
  | 
   | 
145,355  | 
 
  | 
 
Effect of interest on assumed conversions of convertible debt  | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
28,875  | 
 
  | 
   | 
—  | 
 
  | 
 
Net income available to common stockholders for diluted net income per common share  | 
$  | 
74,514  | 
 
  | 
   | 
$  | 
104,185  | 
 
  | 
   | 
$  | 
3,345,332  | 
 
  | 
   | 
$  | 
355,624  | 
 
  | 
 
Weighted average common shares outstanding for basic net income per common share  | 
4,034,122  | 
 
  | 
    | 
3,747,381  | 
 
  | 
   | 
3,870,031  | 
 
  | 
   | 
3,742,309  | 
 
  | 
 
Weighted average impact of assumed Series B Preferred Stock conversion  | 
2,404,143  | 
 
  | 
   | 
2,586,977  | 
 
  | 
   | 
2,525,588  | 
 
  | 
   | 
2,586,977  | 
 
  | 
 
Weighted average impact of assumed convertible debt  | 
—  | 
 
  | 
   | 
—  | 
 
  | 
   | 
293,333  | 
 
  | 
   | 
—  | 
 
  | 
 
Weighted average impact of other dilutive equity instruments  | 
139,389  | 
 
  | 
    | 
173,012  | 
 
  | 
   | 
159,278  | 
 
  | 
   | 
171,533  | 
 
  | 
 
Total shares for diluted net income per common share  | 
6,577,654  | 
 
  | 
    | 
6,507,370  | 
 
  | 
   | 
6,848,230  | 
 
  | 
   | 
6,500,819  | 
 
  | 
 
Net income per common share  | 
   | 
   | 
   | 
   | 
 
  | 
 
  | 
   | 
 
  | 
 
  | 
 
Basic  | 
$  | 
0.01  | 
 
  | 
    | 
$  | 
0.02  | 
 
  | 
   | 
$  | 
0.52  | 
 
  | 
   | 
$  | 
0.06  | 
 
  | 
 
Diluted  | 
$  | 
0.01  | 
 
  | 
    | 
$  | 
0.02  | 
 
  | 
   | 
$  | 
0.49  | 
 
  | 
   | 
$  | 
0.05  | 
 
  | 
 
  
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