Discontinued Operations (Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Discontinued Operations [Abstract]
Total revenues	$ 14,871
Operating and other expenses	(6,203)
Depreciation and amortization	(3,453)
Interest expense (net of interest income)	(82)
Income from discontinued operations	5,133
Total discontinued operations	$ 5,133