Investment in Unconsolidated Joint Ventures (EP II LLC) (Details) - EP II LLC [Member]	12 Months Ended
	Dec. 31, 2015 USD ($) Loan	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Number of possible loan extensions | Loan	2
Period of loan extension	1 year
Equity Method Investment, Ownership Percentage	75.00%
Maximum Amount Available Under Construction Facility Revised	$ 46,000,000
Mortgage Loans on Real Estate, Carrying Amount of Mortgages	$ 40,900,000
Debt Instrument, Basis Spread on Variable Rate	1.85%
Extension of Mortgage Loans Maturity Conditions	two, one-year periods
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 8,600,000
Equity Method Investments Summarized Financial Information Cash	$ 1,300,000
LIBOR [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR
Gables Realty Limited [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	25.00%
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 2,900,000
Secured Mortgage Note Payable [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument of Equity Investee Maturity Date		Oct. 09, 2016