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Real Estate Investments (Details 3) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Supplemental pro forma operating data
Pro forma revenues		$ 142,426		$ 290,467
Pro forma loss from continuing operations		(5,615)		(12,429)
Pro forma net loss available to common shareholders		$ (7,314)		$ (9,448)
Loss per common share from continuing operations :
Loss from continuing operations attributable to common shareholders, Basic	$ (0.09)	$ (0.06)	$ (0.11)	$ (0.13)
Basic -- as pro forma		$ (0.06)		$ (0.13)
Loss from continuing operations attributable to common shareholders, Diluted	$ (0.09)	$ (0.06)	$ (0.11)	$ (0.13)
Diluted - as pro forma		$ 0.06		$ (0.13)
Loss per common share:
Basic -- as reported	$ (0.06)	$ (0.06)	$ (0.08)	$ (0.08)
Basic -- as pro forma		$ (0.06)		$ (0.08)
Diluted - as reported	$ (0.06)	$ (0.06)	$ (0.08)	$ (0.08)
Diluted - as pro forma		$ (0.06)		$ (0.08)

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