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		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Discontinued Operations [Abstract]
Total revenues	$ 961	$ 1,718	$ 3,427	$ 5,774
Operating and other expenses	(705)	(959)	(2,190)	(2,929)
Depreciation and amortization	(13)	(416)	(441)	(1,279)
Interest expense (net of interest income)		(447)	(428)	(1,341)
Income from discontinued operations before gains (losses) and unrealized losses on disposition of rental property	243	(104)	368	225
Realized gains (losses) and unrealized losses on disposition of rental property, net	12		2,390
Total discontinued operations, net	$ 255	$ (104)	$ 2,758	$ 225