Income Taxes (Components of Income Tax Expense (Benefit)) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]      
U.S. $ 250,601 $ 216,654 $ 42,474
Total 250,601 216,654 42,474
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]      
U.S. 315,819 (35,614) (263,930)
Total 315,819 (35,614) (263,930)
Total income tax expense (benefit) on continuing operations 566,420 181,040 (221,456)
Income Tax Effects Allocated Directly to Equity [Abstract]      
Other comprehensive income (loss) (113,517) 29,258 16,417
Additional Paid In Capital (7,574) (9,540) 1,908
Total Income Taxes $ 445,329 $ 200,758 $ (203,131)