Investment in Joint Venture (Schedule of Financial Information for Joint Venture) (Details) (Fund VIII-IX Associates, USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Fund VIII-IX Associates
Schedule of Equity Method Investments [Line Items]
Total Revenues	$ 424,557	$ 520,536	$ 1,491,243	$ 1,486,705
Net Income	$ 7,233	$ 132,922	$ 351,558	$ 285,708