Income Taxes (Schedule Of Components Of Income Tax (Expense) Benefit (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current income tax expense
U.S. Federal	$ (411)	$ (404)	$ 0
State	(403)	(661)	(4,236)
Total current income tax expense	(814)	(1,065)	(4,236)
Deferred income tax (expense) benefit
U.S. Federal	(28,723)	(23,254)	(5,893)
State	(1,419)	(1,292)	3,444
Total deferred income tax expense	(30,142)	(24,546)	(2,449)
Total income tax expense from continuing operations	$ (30,956)	$ (25,611)	$ (6,685)