Investment in Joint Ventures (Schedule of Financial Information for Joint Ventures) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of Equity Method Investments [Line Items]
Total Revenues	$ 424,557	$ 520,536	$ 1,491,243	$ 1,486,705
Income (Loss) From Continuing Operations	7,233	128,880	351,558	261,040
Income From Discontinued Operations	0	3,397	0	1,354,512
Net Income (Loss)	7,233	132,277	351,558	1,615,552
Fund VIII-IX Associates
Schedule of Equity Method Investments [Line Items]
Total Revenues	424,557	520,536	1,491,243	1,486,705
Income (Loss) From Continuing Operations	7,233	132,922	351,558	285,708
Income From Discontinued Operations	0	0		0
Net Income (Loss)	7,233	132,922	351,558	285,708
Fund IX-X-XI-REIT Associates
Schedule of Equity Method Investments [Line Items]
Total Revenues	0	0	0	0
Income (Loss) From Continuing Operations	0	(4,042)	0	(24,668)
Income From Discontinued Operations	0	3,397	0	1,354,512
Net Income (Loss)	$ 0	$ (645)	$ 0	$ 1,329,844