Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share (Details)

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Earnings per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Numerator:        
Net income $ 62,894 $ 74,514 $ 312,018 $ 3,316,457
Less:        
Allocation of undistributed income to Series B Preferred Stock 0 (27,825) (4,190) (1,309,647)
Net income available to common stockholders for basic net income per common share 62,894 46,689 307,828 2,006,810
Add back:        
Allocation of undistributed income to Series B Preferred Stock 0 27,825 4,190 1,309,647
Effect of interest on assumed conversions of convertible debt 0 0 0 28,875
Net income available to common stockholders for diluted net income per common share $ 62,894 $ 74,514 $ 312,018 $ 3,345,332
Denominator:        
Weighted average common shares outstanding for basic net income per common share (in shares) 6,184,216 4,034,122 6,265,981 3,870,031
Weighted average impact of assumed Series B Preferred Stock conversion (in shares) 0 2,404,143 85,286 2,525,588
Weighted average impact of assumed convertible debt (in shares) 0 0 0 293,333
Weighted average impact of other dilutive equity instruments (in shares) 103,137 139,389 94,815 159,278
Weighted average shares for diluted net income per common share (in shares) 6,287,353 6,577,654 6,446,082 6,848,230
Net income per common share:        
Basic (in dollars per share) $ 0.01 $ 0.01 $ 0.05 $ 0.52
Diluted (in dollars per share) $ 0.01 $ 0.01 $ 0.05 $ 0.49