Investment in Joint Ventures (Schedule of Financial Information for Joint Ventures) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Schedule of Equity Method Investments [Line Items]
Total Revenues	$ 550,092	$ 485,944	$ 1,066,686	$ 966,170
Income (Loss) From Continuing Operations	176,608	82,249	344,325	132,161
Income From Discontinued Operations	0	1,288,401	0	1,351,115
Net Income	176,608	1,370,650	344,325	1,483,276
Fund VIII-IX Associates
Schedule of Equity Method Investments [Line Items]
Total Revenues	550,092	485,944	1,066,686	966,170
Income (Loss) From Continuing Operations	176,608	85,770	344,325	152,787
Income From Discontinued Operations	0	0		0
Net Income	176,608	85,770	344,325	152,787
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	(3,521)	0	(20,626)
Income From Discontinued Operations	0	1,288,401	0	1,351,115
Net Income	$ 0	$ 1,284,880	$ 0	$ 1,330,489