Income Taxes (Provision For Income Tax Expense (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Abstract]
Current, Federal	$ (2,091)	$ (134)	$ (64,697)
Current, State	(70)	275	(349)
Current, Total	(2,161)	141	(65,046)
Deferred, Federal	(52,450)	(18,084)	(4,160)
Deferred, State	(1,047)	(5,906)	(16,512)
Deferred, Total	(53,497)	(23,990)	(20,672)
Total provision (benefit) for income taxes	$ (55,658)	$ (23,849)	$ (85,718)