Income Taxes (Schedule Of Income Tax Expense (Benefit)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Abstract]
Federal	$ (151)	$ 151
State	(9)	842	$ 435
Total	(160)	993	435
Federal	(127,482)	(1,015)	(18,873)
State	(3,688)	543	(1,287)
Total	(131,170)	(472)	(20,160)
Income Tax Expense (Benefit), Total	$ (131,330)	$ 521	$ (19,725)