Income Taxes (Income Tax (Provision) Benefit Attributable To Income From Continuing Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
U.S. federal	$ (10,406)	$ (5,575)	$ 0
U.S. state	44	1,316	(6,948)
Foreign	(237)	0	0
Current income tax (provision) benefit	(10,599)	(4,259)	(6,948)
U.S. federal	201,060	(272,289)	(179,699)
U.S. state	21,314	(13,940)	(1,631)
Deferred income tax (provision) benefit	222,374	(286,229)	(181,330)
Income tax (provision) benefit	$ 211,775	$ (290,488)	$ (188,278)

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

Amount of current income tax expense (benefit) pertaining to taxable 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 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.