Organization (Details)	9 Months Ended
	Sep. 30, 2012 Entities	Dec. 31, 2011
Real Estate Properties [Line Items]
Ownership of operating partnership in 25 single asset LLC	100.00%
Organization (Textual) [Abstract]
Ownership in operating partnership	31.50%	25.80%
Number of single asset LLC fully owned	25
Number of partially owned entities	3
Real Estate [Member]
Real Estate Properties [Line Items]
Assets	75.00%
Gross income	75.00%
Single Asset LLC 1
Real Estate Properties [Line Items]
Ownership in LLLP	81.25%
Single Asset LLC 2
Real Estate Properties [Line Items]
Ownership in LLLP	50.00%
Single Asset LLC 3
Real Estate Properties [Line Items]
Ownership in LLLP	40.26%