Quarterly report pursuant to Section 13 or 15(d)

Mortgages, Loans Payable And Other Obligations (Summary Of Secured Debt) (Details)

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Mortgages, Loans Payable And Other Obligations (Summary Of Secured Debt) (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Jun. 30, 2011
Dec. 31, 2010
Mortgages, loans payable and other obligations $ 741,393 $ 743,043
One Grande Commons [Member]
    
Property Name One Grande Commons (b) [1]  
Lender Capital One Bank [1]  
Libor LIBOR +2.00% [1],[2]  
Loan maturity date Dec. 31, 2011 [1]  
Mortgages, loans payable and other obligations 11,000 [1] 11,000 [1]
2200 Renaissance Boulevard [Member]
    
Property Name 2200 Renaissance Boulevard (c) [3]  
Lender Wachovia CMBS [3]  
Effective Interest Rate 5.888% [2],[3]  
Loan maturity date Dec. 01, 2012 [3]  
Mortgages, loans payable and other obligations 16,171 [3] 16,171 [3]
Soundview Plaza [Member]
    
Property Name Soundview Plaza  
Lender Morgan Stanley Mortgage Capital  
Effective Interest Rate 6.015% [2]  
Loan maturity date Jan. 01, 2013  
Mortgages, loans payable and other obligations 15,814 16,089
9200 Edmonston Road [Member]
    
Property Name 9200 Edmonston Road  
Lender Principal Commercial Funding L.L.C.  
Effective Interest Rate 5.534% [2]  
Loan maturity date May 01, 2013  
Mortgages, loans payable and other obligations 4,564 4,646
6305 Ivy Lane [Member]
    
Property Name 6305 Ivy Lane  
Lender John Hancock Life Insurance Co.  
Effective Interest Rate 5.525% [2]  
Loan maturity date Jan. 01, 2014  
Mortgages, loans payable and other obligations 6,361 6,475
395 West Passaic [Member]
    
Property Name 395 West Passaic  
Lender State Farm Life Insurance Co.  
Effective Interest Rate 6.004% [2]  
Loan maturity date May 01, 2014  
Mortgages, loans payable and other obligations 11,029 11,270
6301 Ivy Lane [Member]
    
Property Name 6301 Ivy Lane  
Lender John Hancock Life Insurance Co.  
Effective Interest Rate 5.52% [2]  
Loan maturity date Jul. 01, 2014  
Mortgages, loans payable and other obligations 6,002 6,103
35 Waterview Boulevard [Member]
    
Property Name 35 Waterview Boulevard  
Lender Wachovia CMBS  
Effective Interest Rate 6.348% [2]  
Loan maturity date Aug. 11, 2014  
Mortgages, loans payable and other obligations 19,197 19,341
6 Becker, 85 Livingston, 75 Livingston And 20 Waterview [Member]
    
Property Name 6 Becker, 85 Livingston, 75 Livingston & 20 Waterview  
Lender Wachovia CMBS  
Effective Interest Rate 10.22% [2]  
Loan maturity date Aug. 11, 2014  
Mortgages, loans payable and other obligations 61,664 61,224
4 Sylvan [Member]
    
Property Name 4 Sylvan  
Lender Wachovia CMBS  
Effective Interest Rate 10.19% [2]  
Loan maturity date Aug. 11, 2014  
Mortgages, loans payable and other obligations 14,416 14,395
10 Independence [Member]
    
Property Name 10 Independence  
Lender Wachovia CMBS  
Effective Interest Rate 12.44% [2]  
Loan maturity date Aug. 11, 2014  
Mortgages, loans payable and other obligations 15,753 15,606
4 Becker [Member]
    
Property Name 4 Becker  
Lender Wachovia CMBS  
Effective Interest Rate 9.55% [2]  
Loan maturity date May 11, 2016  
Mortgages, loans payable and other obligations 37,534 37,096
5 Becker [Member]
    
Property Name 5 Becker  
Lender Wachovia CMBS  
Effective Interest Rate 12.83% [2]  
Loan maturity date May 11, 2016  
Mortgages, loans payable and other obligations 11,851 11,599
210 Clay [Member]
    
Property Name 210 Clay  
Lender Wachovia CMBS  
Effective Interest Rate 13.42% [2]  
Loan maturity date May 11, 2016  
Mortgages, loans payable and other obligations 11,650 11,467
51 Imclone [Member]
    
Property Name 51 Imclone  
Lender Wachovia CMBS  
Effective Interest Rate 8.39% [2]  
Loan maturity date May 11, 2016  
Mortgages, loans payable and other obligations 3,889 3,893
Various [Member]
    
Property Name Various (d) [4]  
Lender Prudential Insurance [4]  
Effective Interest Rate 6.332% [2],[4]  
Loan maturity date Jan. 15, 2017 [4]  
Mortgages, loans payable and other obligations 150,000 [4] 150,000 [4]
23 Main Street [Member]
    
Property Name 23 Main Street  
Lender JPMorgan CMBS  
Effective Interest Rate 5.587% [2]  
Loan maturity date Sep. 01, 2018  
Mortgages, loans payable and other obligations 31,270 31,537
Harborside Plaza 5 [Member]
    
Property Name Harborside Plaza 5  
Lender The Northwestern Mutual Life Insurance Co. & New York Life Insurance Co.  
Effective Interest Rate 6.842% [2]  
Loan maturity date Nov. 01, 2018  
Mortgages, loans payable and other obligations 233,087 234,521
100 Walnut Avenue [Member]
    
Property Name 100 Walnut Avenue  
Lender Guardian Life Insurance Co.  
Effective Interest Rate 7.311% [2]  
Loan maturity date Feb. 01, 2019  
Mortgages, loans payable and other obligations 19,344 19,443
One River Center [Member]
    
Property Name One River Center (e) [5]  
Lender Guardian Life Insurance Co. [5]  
Effective Interest Rate 7.311% [2],[5]  
Loan maturity date Feb. 01, 2019 [5]  
Mortgages, loans payable and other obligations 44,314 [5] 44,540 [5]
581 Main Street [Member]
    
Property Name 581 Main Street  
Lender Valley National Bank  
Effective Interest Rate 6.935% [2],[6]  
Loan maturity date Jul. 01, 2034  
Mortgages, loans payable and other obligations $ 16,483 $ 16,627
Basis points of the interest rate at the reset period 225  
Minimum interest rate for the loan after the reset period 6.875%  
Coupon interest rate reset period (f) The coupon interest rate will be reset at the end of year 10 (2019) and year 20 (2029) at 225 basis points over the 10-year treasury yield 45 days prior to the reset dates with a minimum rate of 6.875 percent.  
[1] The mortgage loan has three one-year extension option subject to certain conditions and the payment of a fee.
[2] Reflects effective rate of debt, including deferred financing costs, comprised of the cost of terminated treasury lock agreements (if any), debt initiation costs, mark-to-market adjustment of acquired debt and other transaction costs, as applicable.
[3] The property does not generate sufficient cash flow to meet debt service requirements. As a result, beginning January 2011, debt service has not been made and a modification of the loan terms has been requested from the lender.
[4] Mortgage is collateralized by seven properties.
[5] Mortgage is collateralized by the three properties comprising One River Center.
[6] The coupon interest rate will be reset at the end of year 10 (2019) and year 20 (2029) at 225 basis points over the 10-year treasury yield 45 days prior to the reset dates with a minimum rate of 6.875 percent.