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Income Taxes (Schedule Of Provision For Income Tax Benefit (Expense)) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Expense Benefit [Abstract]                      
Current - Federal                 $ 61,655 $ 18,608 $ (4,534)
Current - foreign                 (48,579) (51,293) (41,388)
Current - state                 (9,408) 14,719 (5,278)
Total current benefit (expense)                 3,668 (17,966) (51,200)
Deferred - Federal                 261,014 126,078 211,137
Deferred - foreign                 27,970 13,708 (3,859)
Deferred - state                 15,627 4,158 3,902
Total deferred tax benefit                 304,611 143,944 211,180
Income tax benefit $ 128,986 $ 13,232 $ 8,663 $ 157,398 $ 3,468 $ 20,665 $ 9,184 $ 92,661 $ 308,279 $ 125,978 $ 159,980