Annual report pursuant to Section 13 and 15(d)

Income Taxes (Details 2)

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Income Taxes (Details 2) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Federal tax expense, at statutory rate $ 222,982 $ 166,064 $ 154,418
State income tax expense, net of federal benefit 19,031 16,606 15,751
State income rate changes 8,666 2,251 3,851
Non-deductible expenses 9,545 477 457
Change in valuation allowance (4,228) (3,195,651) (166,452)
Other, net 3,881 12,019 6,209
Total income tax expense (benefit) $ 259,877 $ (2,998,234) $ 14,234