Real Estate Assets Variable Interest Entities (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Land	$ 13,802,148	$ 12,430,434
Buildings and improvements	114,355,138	111,653,203
Property, Plant and Equipment, Gross	128,157,286	124,083,637
VIE Property, Plant and Equipment, Gross	35,003,701	34,858,037
Accumulated Depreciation - VIES	(13,028,974)	(12,332,334)
VIE Property Property, Plant and Equipment, Net	21,974,727	22,525,703
Bent Tree [Member]
Property, Plant and Equipment [Line Items]
Number of Units in Real Estate Property	232	232
Land	986,000	986,000
Buildings and improvements	11,811,474	11,758,519
Property, Plant and Equipment, Gross	12,797,474	12,744,519
Fairmont Oaks [Member]
Property, Plant and Equipment [Line Items]
Number of Units in Real Estate Property	178	178
Land	850,400	850,400
Buildings and improvements	8,648,045	8,615,014
Property, Plant and Equipment, Gross	9,498,445	9,465,414
Lake Forest [Member]
Property, Plant and Equipment [Line Items]
Number of Units in Real Estate Property	240	240
Land	1,396,800	1,396,800
Buildings and improvements	11,310,982	11,251,304
Property, Plant and Equipment, Gross	$ 12,707,782	$ 12,648,104