Quarterly report pursuant to Section 13 or 15(d)

Investments In Unconsolidated Joint Ventures (Red Bank Corporate Plaza) (Details)

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Investments In Unconsolidated Joint Ventures (Red Bank Corporate Plaza) (Details) (Red Bank Corporate Plaza [Member], USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2011
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Mar. 31, 2011
Sep. 30, 2010
Sep. 30, 2011
sqft
Sep. 30, 2010
May 31, 2011
Red Bank Corporate Plaza [Member]
           
Percentage of interest in venture 50.00%     50.00%    
Mortgage loans, carrying amount $ 18,300,000     $ 18,300,000   $ 20,300,000
Mortgage loan maturity date   May 2011   May 17, 2016    
Area of office property 92,878     92,878    
Spread over LIBOR   125   300    
LIBOR Interest Rate 0.24%     0.24%    
Mortgage repayment       1,700,000    
Percentage of loan principal swapped for fixed rate of interest 75.00%     75.00%    
Fixed interest rate 3.99375%     3.99375%    
Management, leasing and other services fees $ 24,000   $ 24,000 $ 72,000 $ 72,000