Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income from continuing operations before income taxes
Income from continuing operations before income taxes	$ 34,761	$ 82,133	$ 58,145
Income tax expense at the statutory rate	(12,166)	(28,747)	(20,350)
State income taxes, net of U.S. federal income tax benefit	(859)	(1,681)	(1,722)
Adjustment to prior period state income taxes, net of U.S. federal income tax benefit	0	0	(4,735)
Previously unbenefitted capital loss associated with investment		0	1,171
Nondeductible expenses	0	(93)	25
Other	122	(435)	0
Total income tax expense from continuing operations	(12,903)	(30,956)	(25,611)
United States [Member]
Income from continuing operations before income taxes
Income from continuing operations before income taxes	$ 34,761	$ 82,133	$ 58,145