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Income Taxes (Provision For Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal, Current	$ 294,509us-gaap_CurrentFederalTaxExpenseBenefit	$ 270,024us-gaap_CurrentFederalTaxExpenseBenefit	$ 797,406us-gaap_CurrentFederalTaxExpenseBenefit
State, Current	40,325	7,148	135,148
Federal, Deferred	(168,756)	94,896	70,671
State, Deferred	(24,906)	19,508	24,737
Income tax provision total	$ 141,172	$ 391,576	$ 1,027,962

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.

Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.