Property Acquisitions, Discontinued Operations, And Assets Held For Sale (Summary Of Income From Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Property Acquisitions, Discontinued Operations, And Assets Held For Sale [Abstract]
Property revenues	$ 4,455	$ 13,545	$ 14,988	$ 40,528
Property expenses	(1,891)	(6,181)	(6,391)	(18,614)
Operating results	2,564	7,364	8,597	21,914
Interest	0	0	0	(36)
Depreciation and Amortization	(908)	(3,400)	(3,301)	(10,714)
Income from discontinued operations	1,656	3,964	5,296	11,164
Gain on sale of discontinued operations, net of tax	$ 34,410	$ 0	$ 91,059	$ 32,541