Dispositions, Assets Held for Sale and Discontinued Operations (Details 1) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Rental income, discontinued	$ 0	$ 4,027,000	$ 881,000	$ 15,603,000
Expenses:
Interest expense, discontinued	0	522,000	157,000	3,799,000
Property operating expenses, discontinued	0	875,000	0	2,605,000
Provision for depreciation, discontinued	0	1,954,000	0	6,802,000
Expenses, discontinued	0	3,351,000	157,000	13,206,000
Income (loss) from discontinued operations, net	$ 0	$ 676,000	$ 724,000	$ 2,397,000