Investment in Unconsolidated Joint Ventures (Cousins Watkins LLC) (Details) (Cousins Watkins LLC [Member], USD $)	12 Months Ended
	Dec. 31, 2013 Loan
Schedule of Equity Method Investments [Line Items]
Number of possible loan extensions	2
Number of mortgage loans obtained by joint venture (loans)	4
Mortgage loans on real estate maximum borrowing capacity	$ 33,500,000
Maturity date of mortgage loans	Jan. 01, 2016
Extension of mortgage loans maturity, conditions	two, one-year terms, provided certain conditions are met
Percentage of loans guaranteed by Company (percent)	25.00%
Number of loans guaranteed by company (loans)	2
Internal rate of return on project (percent)	16.00%
Cash balance of joint venture	948,000
Equity Method Investment, Ownership Percentage	50.50%
Period of loan extension	1 year
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.65%
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.85%
LIBOR [Member]
Schedule of Equity Method Investments [Line Items]
Variable rate basis	LIBOR
Four Loans [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding balance of mortgage loan	27,700,000
Mortgages [Member]
Schedule of Equity Method Investments [Line Items]
Approximate amount of loans guaranteed by Company	$ 4,100,000
Retail [Member]
Schedule of Equity Method Investments [Line Items]
Number of real estate properties owned by venture (properties)	4
Watkins Retail Group [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	49.50%