Notes Payable - (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Debt Instrument [Line Items]
Note payable	$ 22,400,000		$ 18,000,000
Debt instrument, weighted average years to maturity	4 years 7 months 6 days
Repaid outstanding balance of subordinate loan	4,696,155	0
Mortgage notes payable
Debt Instrument [Line Items]
Note payable	22,400,000
Debt, weighted average interest rate	4.62%
Mortgage notes payable | Four point five percent mortgage note payable
Debt Instrument [Line Items]
Note payable	4,400,000
Number of Mortgage Notes Payable	2
Notes payable, interest rate	4.50%
Subordinated debt | Series C, LLC
Debt Instrument [Line Items]
Repaid outstanding balance of subordinate loan	$ (4,696,155)