Investment in Unconsolidated Joint Ventures (EP I LLC) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) Loan
EP I LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	75.00%
Maximum amount available under construction facility, revised	$ 58,000,000
Debt Instrument, Basis Spread on Variable Rate	1.75%
Cash balance of joint venture	$ 1,500,000
EP II LLC [Member]
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
Outstanding balance of mortgage loan	$ 40,900,000
Debt Instrument, Basis Spread on Variable Rate	1.85%
Extension of mortgage loans maturity, conditions	two, one-year periods
Approximate amount of loans guaranteed by Company	$ 8,600,000
Cash balance of joint venture	$ 1,300,000
LIBOR [Member] | EP I LLC [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR
LIBOR [Member] | EP II LLC [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR
Gables Realty Limited [Member] | EP I LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	25.00%
Gables Realty Limited [Member] | EP II LLC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	25.00%
Approximate amount of loans guaranteed by Company	$ 2,900,000