Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (Gale Jefferson, L.L.C.) (Narrative) (Details)

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Investments In Unconsolidated Joint Ventures (Gale Jefferson, L.L.C.) (Narrative) (Details) (USD $)
0 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 9 Months Ended
Jul. 15, 2013
Sep. 30, 2013
Sep. 30, 2013
One Jefferson [Member]
Jan. 04, 2013
Gale Jefferson, L.L.C. [Member]
Sep. 30, 2013
Gale Jefferson, L.L.C. [Member]
sqft
Sep. 30, 2012
Gale Jefferson, L.L.C. [Member]
Sep. 30, 2013
Gale Jefferson, L.L.C. [Member]
sqft
Sep. 30, 2012
Gale Jefferson, L.L.C. [Member]
Schedule of Equity Method Investments [Line Items]                
Percentage of interest in venture     8.33%          
Rentable Square Feet         100,010   100,010  
Lease expiration date             Aug. 01, 2025  
Mortgage loans, carrying amount     $ 20,200,000          
Spread over LIBOR 1.25%   1.60%          
Mortgage loan, maturity date     October 2013          
Venture sale of real estate       3,200,000        
Share of gain on sale of real estate       1,100,000        
Gain on sale of property   84,930,000         69,000  
Management, leasing and other services fees         $ 0 $ 48,000 $ 0 $ 144,000