Dispositions, Assets Held for Sale and Discontinued Operations (Details 1) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Rental income, discontinued	$ 583,000	$ 6,788,000
Expenses:
Interest expense, discontinued	123,000	1,896,000
Property operating expenses, discontinued	0	865,000
Provision for depreciation, discontinued	0	2,434,000
Expenses, discontinued	123,000	5,195,000
Income (loss) from discontinued operations, net	$ 460,000	$ 1,593,000