Income Taxes (Components Of Provision For Income Taxes) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Expense (Benefit) [Abstract]
Federal, Current (expense) benefit	$ (13,553)	$ (30,325)	$ 91,305
State, Current (expense) benefit	(7,960)	(1,963)	27,777
Foreign, including foreign withholding tax, Current (expense) benefit	(8,498)	(1,146)	(8,474)
Current (expense) benefit	(30,011)	(33,434)	110,608
Federal, Deferred (expense) benefit	(67,700)	(17,047)	(103,343)
State, Deferred (expense) benefit	(6,760)	(1,501)	(36,397)
Foreign, Deferred (expense) benefit	4,261	(3,049)	3,810
Deferred (expense) benefit	(70,199)	(21,597)	(135,930)
Total income tax expense from continuing operations	(100,210)	(55,031)	(25,322)
Income tax benefit (expense) from discontinued operations	$ (3,594)	$ 4,422	$ (279,644)