Investment in Joint Ventures (Components of Income from Discontinued Operations Recognized by Joint Ventures) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]
Total	$ 0	$ 1,335,377	$ (850,397)
Fund IX-X-XI-REIT Associates
Schedule of Equity Method Investments [Line Items]
Operating Income (Loss)	0	108,434	(86,656)
Impairment Loss			1,448,217
Gain on Sale	0	1,226,943	684,476
Total	$ 0	$ 1,335,377	$ (850,397)