Quarterly report pursuant to Section 13 or 15(d)

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

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Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details) (USD $)
In Thousands, unless otherwise specified
 0 Months Ended 9 Months Ended
Jul. 15, 2013
Sep. 30, 2013
Dec. 31, 2012
Debt Instrument [Line Items]      
Spread over LIBOR 1.25%    
Mortgages, loans payable and other obligations   $ 752,344 $ 757,495
Loss from early extinguishment of debt   703  
51 Imclone [Member]
      
Debt Instrument [Line Items]      
Property Name   51 Imclone (b) [1]  
Lender   Wells Fargo CMBS [1]  
Effective Rate   8.39% [1],[2]  
Mortgages, loans payable and other obligations      [1] 3,878 [1]
9200 Edmonston Road [Member]
      
Debt Instrument [Line Items]      
Property Name   9200 Edmonston Road (c) [3]  
Lender   Principal Commercial Funding L.L.C. [3]  
Effective Rate   5.534% [2],[3]  
Mortgages, loans payable and other obligations   4,158 [3] 4,305 [3]
Loan maturity date   May 01, 2013 [3]  
Percentage of leased property occupied   100.00%  
6305 Ivy Lane [Member]
      
Debt Instrument [Line Items]      
Property Name   6305 Ivy Lane (d) [4]  
Lender   RGA Reinsurance Company [4]  
Effective Rate   5.525% [2],[4]  
Mortgages, loans payable and other obligations   5,811 [4] 5,984 [4]
Loan maturity date   Oct. 01, 2013 [4]  
Port Imperial South 4/5 [Member]
      
Debt Instrument [Line Items]      
Property Name   Port Imperial South 4/5  
Lender   Wells Fargo Bank N.A.  
LIBOR   LIBOR+3.50 [2]  
Spread over LIBOR   3.50% [2]  
Mortgages, loans payable and other obligations   36,355 34,889
Loan maturity date   Dec. 31, 2013  
395 West Passaic [Member]
      
Debt Instrument [Line Items]      
Property Name   395 West Passaic [4]  
Lender   State Farm Life Insurance Co. [4]  
Effective Rate   6.004% [2],[4]  
Mortgages, loans payable and other obligations   9,858 [4] 10,231 [4]
Loan maturity date   May 01, 2014 [4]  
6301 Ivy Lane [Member]
      
Debt Instrument [Line Items]      
Property Name   6301 Ivy Lane  
Lender   RGA Reinsurance Company  
Effective Rate   5.52% [2]  
Mortgages, loans payable and other obligations   5,514 5,667
Loan maturity date   Jul. 01, 2014  
35 Waterview Boulevard [Member]
      
Debt Instrument [Line Items]      
Property Name   35 Waterview Boulevard  
Lender   Wells Fargo CMBS  
Effective Rate   6.348% [2]  
Mortgages, loans payable and other obligations   18,502 18,746
Loan maturity date   Aug. 11, 2014  
6 Becker, 85 Livingston, 75 Livingston & 20 Waterview [Member]
      
Debt Instrument [Line Items]      
Property Name   6 Becker, 85 Livingston, 75 Livingston & 20 Waterview [5]  
Lender   Wells Fargo CMBS [5]  
Effective Rate   10.22% [2],[5]  
Mortgages, loans payable and other obligations   63,945 [5] 63,126 [5]
Loan maturity date   Aug. 11, 2014 [5]  
Number of properties used to collateralized mortgage   4  
4 Sylvan [Member]
      
Debt Instrument [Line Items]      
Property Name   4 Sylvan  
Lender   Wells Fargo CMBS  
Effective Rate   10.19% [2]  
Mortgages, loans payable and other obligations   14,524 14,485
Loan maturity date   Aug. 11, 2014  
10 Independence [Member]
      
Debt Instrument [Line Items]      
Property Name   10 Independence  
Lender   Wells Fargo CMBS  
Effective Rate   12.44% [2]  
Mortgages, loans payable and other obligations   16,536 16,251
Loan maturity date   Aug. 11, 2014  
Port Imperial South [Member]
      
Debt Instrument [Line Items]      
Property Name   Port Imperial South  
Lender   Wells Fargo Bank N.A.  
LIBOR   LIBOR+1.75 [2]  
Spread over LIBOR   1.75% [2]  
Mortgages, loans payable and other obligations   43,045 42,168
Loan maturity date   Sep. 19, 2015  
4 Becker [Member]
      
Debt Instrument [Line Items]      
Property Name   4 Becker  
Lender   Wells Fargo CMBS  
Effective Rate   9.55% [2]  
Mortgages, loans payable and other obligations   38,681 38,274
Loan maturity date   May 11, 2016  
5 Becker [Member]
      
Debt Instrument [Line Items]      
Property Name   5 Becker (f) [6]  
Lender   Wells Fargo CMBS [6]  
Effective Rate   12.83% [2],[6]  
Mortgages, loans payable and other obligations   12,912 [6] 12,507 [6]
Loan maturity date   May 11, 2016 [6]  
Number of impaired properties   8  
210 Clay [Member]
      
Debt Instrument [Line Items]      
Property Name   210 Clay  
Lender   Wells Fargo CMBS  
Effective Rate   13.42% [2]  
Mortgages, loans payable and other obligations   12,638 12,275
Loan maturity date   May 11, 2016  
Various [Member]
      
Debt Instrument [Line Items]      
Property Name   Various (g) [7]  
Lender   Prudential Insurance [7]  
Effective Rate   6.332% [2],[7]  
Mortgages, loans payable and other obligations   147,939 [7] 149,281 [7]
Loan maturity date   Jan. 15, 2017 [7]  
Number of properties used to collateralized mortgage   7  
23 Main Street [Member]
      
Debt Instrument [Line Items]      
Property Name   23 Main Street  
Lender   JPMorgan CMBS  
Effective Rate   5.587% [2]  
Mortgages, loans payable and other obligations   29,997 30,395
Loan maturity date   Sep. 01, 2018  
Harborside Plaza 5 [Member]
      
Debt Instrument [Line Items]      
Property Name   Harborside Plaza 5  
Lender   The Northwestern Mutual Life Insurance Co. & New York Life Insurance Co.  
Effective Rate   6.842% [2]  
Mortgages, loans payable and other obligations   225,996 228,481
Loan maturity date   Nov. 01, 2018  
233 Canoe Brook Road [Member]
      
Debt Instrument [Line Items]      
Property Name   233 Canoe Brook Road  
Lender   The Provident Bank  
Effective Rate   4.375% [2]  
Mortgages, loans payable and other obligations   3,895 3,945
Loan maturity date   Feb. 01, 2019  
100 Walnut Avenue [Member]
      
Debt Instrument [Line Items]      
Property Name   100 Walnut Avenue  
Lender   Guardian Life Insurance Co.  
Effective Rate   7.311% [2]  
Mortgages, loans payable and other obligations   18,852 19,025
Loan maturity date   Feb. 01, 2019  
One River Center [Member]
      
Debt Instrument [Line Items]      
Property Name   One River Center (h) [8]  
Lender   Guardian Life Insurance Co. [8]  
Effective Rate   7.311% [2],[8]  
Mortgages, loans payable and other obligations   $ 43,186 [8] $ 43,582 [8]
Loan maturity date   Feb. 01, 2019 [8]  
Number of properties used to collateralized mortgage   3  
[1] With the sale of the property on May 31, 2013, the mortgage was satisfied by the Company. The Company incurred $0.7 million in costs for the debt satisfaction, which was included in discontinued operations: loss from early extinguishment of debt for the nine months ended September 30, 2013.
[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 lease with the tenant occupying 100 percent of the building expired on May 1, 2013 and the tenant continues to occupy the building on a month-to-month basis. The mortgage loan matured on May 1, 2013 and was not repaid. The Company received a notice of default from the lender on July 17, 2013. The Company has requested a modification of the loan terms and is also in discussions regarding a deed-in-lieu of foreclosure with the lender.
[4] On October 1, 2013, the Company repaid the mortgage loan at par, using available cash. The original maturity date was January 1, 2014.Mortgage is cross collateralized by the four properties.The cash flow from this property is insufficient to cover operating costs and debt service. Consequently, the Company notified the lender and suspended debt service payments in August 2013. The Company has begun discussions with the lender regarding a modification of loan terms. The Company recorded an impairment charge on this asset along with eight other office properties as of September 30, 2013. See Note 3: Real Estate Transactions - Impairments.
[5] Mortgage is cross collateralized by the four properties.
[6] The cash flow from this property is insufficient to cover operating costs and debt service. Consequently, the Company notified the lender and suspended debt service payments in August 2013. The Company has begun discussions with the lender regarding a modification of loan terms. The Company recorded an impairment charge on this asset along with eight other office properties as of September 30, 2013. See Note 3: Real Estate Transactions - Impairments.
[7] Mortgage is collateralized by seven properties. The Operating Partnership has agreed, subject to certain conditions, to guarantee repayment of a portion of the loan.
[8] Mortgage is collateralized by the three properties comprising One River Center