Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details 1)

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Income Taxes (Details 1) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Difference between federal tax expense (benefit) at statutory rate and at our effective rate      
Federal tax expense, at statutory rate $ 166,064 $ 154,418 $ 16,678
State income tax expense, net of federal benefit 16,606 15,751 1,620
State income rate changes 2,251 3,851 (2,252)
Non-deductible expenses 477 457 4,130
Change in valuation allowance (3,195,651) (166,452) (21,749)
Other, net 12,019 6,209 6,193
Income tax (benefit) expense $ (2,998,234) $ 14,234 $ 4,620