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 3 Months Ended
Jan. 04, 2013
Mar. 31, 2013
sqft
Mar. 31, 2012
One Jefferson [Member]
     
Schedule of Equity Method Investments [Line Items]      
Percentage of interest in venture   8.33%  
Mortgage loans, carrying amount   $ 20,200,000  
Spread over LIBOR   1.60%  
Mortgage loan, maturity date   October 2013  
Gale Jefferson, L.L.C. [Member]
     
Schedule of Equity Method Investments [Line Items]      
Rentable Square Feet   100,010  
Lease expiration date   Aug. 01, 2025  
Venture sale of real estate 3,200,000    
Share of gain on sale of real estate 1,100,000    
Management, leasing and other services fees   $ 16,000 $ 48,000