Business Combinations and Sale of Joint Venture Equity Interests (Details Textual) (USD $)	1 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2012 Springhouse Managing [Member]	Dec. 31, 2012 Springhouse Managing [Member] Minimum [Member]	Dec. 31, 2012 Springhouse Managing [Member] Maximum [Member]	Jun. 30, 2012 Creekside Managing [Member]	Dec. 31, 2012 Creekside Managing [Member] Minimum [Member]	Dec. 31, 2012 Creekside Managing [Member] Maximum [Member]	Oct. 02, 2012 Enders Property [Member]	Dec. 17, 2012 Berry Hill Development [Member]	Oct. 18, 2012 Berry Hill Development [Member]	Dec. 31, 2012 Mda Apartments [Member]		Dec. 17, 2012 Mda Apartments [Member]
Our Ownership Interest in Property Owner					1.00%	50.00%	51.00%	2.00%	33.33%	35.33%				35.31%	[1]
Payments to Acquire Interest in Joint Venture		$ 202,532
Equity Method Investment Realized Gain Loss On Disposal		3,450,460
Proceeds from Sale of Equity Method Investments	3,113,581
Closing Costs and Disposition Fee Paid	136,216
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized	2,014,533
Acquisition and Disposition Fees		3,426,267	0	362,766
Investments in unconsolidated real estate joint ventures (Note 5)		2,398,902	5,387,147								4,716,846		3,788,725			6,098,306
Our Ownership Interest in Property Owner											48.40%	5.158%	58.575%			35.31%
Equity Method Investments Additional Capital Contribution												369,034
Business Acquisition Joint Venture Equity Interests Gain Loss Recognized																$ 7,297,942

[1] The approximate rentable square footage for the MDA Apartments includes 8,200 square feet of retail place.