Fair Value Measurements Fair Market Value of Liabilities (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Debt financing	$ 447,606,493	$ 345,359,000
Mortgages payable	68,494,688	76,707,834
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Debt financing	454,031,754	345,359,000
Mortgages payable	68,494,688	76,707,845
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Debt financing	453,832,018	346,813,909
Mortgages payable	$ 67,260,985	$ 76,134,465