Discontinued Operations (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Discontinued Operation Additional Disclosures [Abstract]
Revenues	$ 94,000	$ 1,624,000	$ 842,000	$ 3,457,000
Expenses	325,000	1,746,000	1,115,000	3,054,000
(Loss) gain on sale of real estate	(298,000)	(121,000)	(479,000)	660,000
Impairment charges	0	(41,000)	(3,068,000)	(41,000)
(Loss) income from discontinued operations	(529,000)	(284,000)	(3,820,000)	1,022,000
Real Estate Properties Sold [Line Items]
Net Selling Price			25,200,000	10,600,000
Number Of Real Estate Properties Sold			five	four
(Loss) gain on sale of real estate	(298,000)	(121,000)	(479,000)	660,000
Impairment charges	0	41,000	3,068,000	41,000
Impairment Recognized in 2011 [Member]
Discontinued Operation Additional Disclosures [Abstract]
Impairment charges			(6,900,000)
Real Estate Properties Sold [Line Items]
Impairment charges			6,900,000
Impairment Recognized In 2010 [Member]
Discontinued Operation Additional Disclosures [Abstract]
Impairment charges				(2,300,000)
Real Estate Properties Sold [Line Items]
Impairment charges				$ 2,300,000