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, 2012	Mar. 31, 2011
Discontinued Operations [Abstract]
Total revenues	$ 1,528	$ 2,117
Operating and other expenses	(878)	(1,089)
Depreciation and amortization	(415)	(441)
Interest expense (net of interest income)	(428)	(447)
Income from discontinued operations before gains (losses) and unrealized losses on disposition of rental property	(193)	140
Realized gains (losses) and unrealized losses on disposition of rental property, net	4,012
Total discontinued operations, net	$ 3,819	$ 140