Investment in Joint Ventures (Components of Income from Discontinued Operations Recognized by 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	$ 0	$ 1,288,401	$ 0	$ 1,351,115
Fund IX-X-XI-REIT Associates
Schedule of Equity Method Investments [Line Items]
Operating Income			0	122,363
Gain on Sale			0	1,228,752
Total	$ 0	$ 1,288,401	$ 0	$ 1,351,115

This item represents the amount of gain (loss) arising from the disposal of an equity method investment.

No definition available.

Name:	us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration