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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		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Property Acquisitions, Discontinued Operations, And Assets Held For Sale [Abstract]
Property revenues	$ 0	$ 3,704	$ 1,209	$ 7,249
Property expenses	0	1,832	670	3,614
Operating results	0	1,872	539	3,635
Depreciation and amortization	0	977	186	1,948
Income from discontinued operations	$ 0	$ 895	$ 353	$ 1,687

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After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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