Real Estate Assets Fair Value of Acquisition (Details) (USD $)					12 Months Ended		6 Months Ended
	Feb. 28, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Arboretum [Member] Unit	Mar. 31, 2011 Arboretum [Member]	Jun. 30, 2011 Eagle Village [Member]	Sep. 30, 2010 Eagle Village [Member] Unit	Sep. 30, 2012 Maples on 97th [Member]	Aug. 30, 2012 Maples on 97th [Member] Unit	Dec. 31, 2012 Effective rate - minimum [Member] Eagle Village [Member]	Jun. 30, 2011 Effective rate - minimum [Member] Eagle Village [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value		$ 30,172,773	$ 20,086,841			$ 186,575	$ 244,923
Number of Units in Real Estate Property					145			511		258
Other current assets						116,631	46,380		44,534
In-place lease assets							96,829		428,865
Real estate assets		85,488,292	75,268,934			20,031,050	12,383,605		5,071,135
Total assets		413,150,755	297,976,545	241,607,249		20,945,052	13,469,290		5,544,534
Accounts payable, accrued expenses and other liabilities		5,013,947	2,465,785				278,230		69,120
Partners' Capital		181,917,192	131,044,260	128,162,891					5,475,414
Total Liabilities and Partners' Capital		413,150,755	297,976,545			20,945,052	13,469,290		5,544,534
Mortgages payable	7,500,000	39,119,507	35,464,455		17,500,000	17,500,000	8,925,000
Business Acquisition, Cost of Acquired Entity, Purchase Price										5,500,000
Real Estate Investment Property, Net					20,000,000
Restricted Cash and Cash Equivalents						429,231	589,493
Deferred Finance Costs, Net		2,764,734	3,368,938			181,565	108,060
Assets, Net						3,445,052	4,266,060
Business Acquisition, Cost of Acquired Entity, Transaction Costs					267,000
Debt Instrument, Interest Rate, Stated Percentage	9.00%				5.25%						3.50%	3.50%
Derivative, Maturity Date at a point in time					Mar. 31, 2014		Jun. 01, 2013
Noncontrolling Interest, Ownership Percentage by Parent								8.70%
Business Acquisition, Cost of Acquired Entity, Cash Paid							3,100,000
Noncontrolling Interest in Joint Ventures								1,100,000
Debt Instrument, Basis Spread on Variable Rate							2.75%
Preferred Return on Investment							$ 125,000