Real Estate Assets Business Combination, Proforma Income Statement (Details) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net income (loss) allocated to unitholders	$ 8,050,634	$ 861,588
Unitholders' interest in net income (loss) per unit (basic and diluted)	$ 0.19	$ 0.03
Maples on 97th [Member]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenues	13,394,714	5,785,809
Net Income (loss)	8,355,688	650,547
Net income (loss) allocated to unitholders	$ 8,084,553	$ 881,502
Unitholders' interest in net income (loss) per unit (basic and diluted)	$ 0.19	$ 0.03