Annual report pursuant to Section 13 and 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)
$ in Thousands
 12 Months Ended
Mar. 27, 2015
Aug. 15, 2014
Dec. 31, 2015
USD ($)
property
item
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Debt Instrument [Line Items]          
Mortgages, loans payable and other obligations     $ 731,076 $ 820,910  
Loss from early extinguishment of debt         $ 703
Repayment of mortgages, loans payable and other obligations     $ 43,133 83,808 $ 20,715
Minimum [Member]          
Debt Instrument [Line Items]          
Percentage of interest in venture     7.50%    
Maximum [Member]          
Debt Instrument [Line Items]          
Percentage of interest in venture     85.00%    
Overlook - Site IIID, IIIC, IIIA, And IIB [Member]          
Debt Instrument [Line Items]          
Property Name [1]     Overlook - Site IIID,IIIC, IIIA & Overlook - Site IIB    
Lender [1]     Wells Fargo Bank N.A.    
Mortgages, loans payable and other obligations [1]     23,047  
10 Independence, 4 Sylvan, 210 Clay, And 5 Becker [Member}          
Debt Instrument [Line Items]          
Property Name [2]     10 Independence, 4 Sylvan, 210 Clay, & 5 Becker    
Lender [2]     Wells Fargo CMBS    
Mortgages, loans payable and other obligations [2]     58,696  
10 Independence, 4 Sylvan, 210 Clay, And 5 Becker [Member} | Minimum [Member]          
Debt Instrument [Line Items]          
Property Debt, Interest Rate, Spread Over LIBOR     10.26%    
10 Independence, 4 Sylvan, 210 Clay, And 5 Becker [Member} | Maximum [Member]          
Debt Instrument [Line Items]          
Property Debt, Interest Rate, Spread Over LIBOR     19.45%    
6 Becker, 85 Livingston, 75 Livingston & 20 Waterview [Member]          
Debt Instrument [Line Items]          
Property Name     6 Becker, 85 Livingston, 75 Livingston & 20 Waterview    
Lender     Wells Fargo CMBS    
Effective rate [3]     10.26%    
Mortgages, loans payable and other obligations     $ 63,279 65,035  
Loan maturity date [4]     Aug. 11, 2014    
Number of properties used to collateralized mortgage | property     4    
9200 Edmonston Road [Member]          
Debt Instrument [Line Items]          
Property Name     9200 Edmonston Road    
Lender     Principal Commercial Funding L.L.C.    
Effective rate [3]     9.78%    
Mortgages, loans payable and other obligations     $ 3,793 3,951  
Loan maturity date [5]     May 01, 2015    
Port Imperial South [Member]          
Debt Instrument [Line Items]          
Property Name     Port Imperial South    
Lender     Wells Fargo Bank N.A.    
LIBOR [3]     LIBOR+1.75    
Property Debt, Interest Rate, Spread Over LIBOR     1.75%    
Mortgages, loans payable and other obligations     $ 34,962 44,119  
Loan maturity date [6]     Jan. 17, 2016    
4 Becker [Member]          
Debt Instrument [Line Items]          
Property Name     4 Becker    
Lender     Wells Fargo CMBS    
Effective rate [3]     9.55%    
Mortgages, loans payable and other obligations     $ 40,083 39,421  
Loan maturity date     May 11, 2016    
Curtis Center [Member]          
Debt Instrument [Line Items]          
Property Name [7]     Curtis Center (g)    
Lender [7]     CCRE & PREFG    
LIBOR [3],[7],[8]     LIBOR+5.912    
Property Debt, Interest Rate, Spread Over LIBOR [8]     5.912%    
Mortgages, loans payable and other obligations [7]     $ 64,000 64,000  
Loan maturity date [7]     Oct. 09, 2016    
Percentage of interest in venture     50.00%    
Number of extension options | item     3    
Loan extension period     1 year    
Deferred financing costs amortization interest rate     1.362%    
Curtis Center [Member] | Senior Loan [Member]          
Debt Instrument [Line Items]          
Effective rate     3.491%    
Property Debt, Interest Rate, Spread Over LIBOR     3.29%    
Mortgages, loans payable and other obligations     $ 102,000    
Percentage of interest in venture     50.00%    
LIBOR measurement period     1 month    
Curtis Center [Member] | Mezzanine Loan [Member]          
Debt Instrument [Line Items]          
Effective rate     9.831%    
Property Debt, Interest Rate, Spread Over LIBOR     9.50%    
Mortgages, loans payable and other obligations     $ 26,000    
Percentage of interest in venture     50.00%    
Maximum borrowing capacity     $ 48,000    
LIBOR measurement period     1 month    
Various [Member]          
Debt Instrument [Line Items]          
Property Name [9]     Various (i)    
Lender [9]     Prudential Insurance    
Effective rate [3],[9]     6.332%    
Mortgages, loans payable and other obligations [9]     $ 143,513 145,557  
Loan maturity date [9]     Jan. 15, 2017    
Number of properties used to collateralized mortgage | property     7    
Repayment of mortgages, loans payable and other obligations     $ 61,100    
150 Main St [Member]          
Debt Instrument [Line Items]          
Property Name     150 Main St.    
Lender     Webster Bank    
LIBOR [3]     LIBOR+2.35    
Property Debt, Interest Rate, Spread Over LIBOR     2.35%    
Mortgages, loans payable and other obligations     $ 10,937 1,193 [10]  
Loan maturity date     Mar. 30, 2017    
150 Main St [Member] | Construction Loan [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity     $ 28,800    
23 Main Street [Member]          
Debt Instrument [Line Items]          
Property Name     23 Main Street    
Lender     JPMorgan CMBS    
Effective rate [3]     5.587%    
Mortgages, loans payable and other obligations     $ 28,541 29,210  
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 [3]     6.842%    
Mortgages, loans payable and other obligations     $ 217,736 221,563  
Loan maturity date     Nov. 01, 2018    
100 Walnut Avenue [Member]          
Debt Instrument [Line Items]          
Property Name     100 Walnut Avenue    
Lender     Guardian Life Insurance Co.    
Effective rate [3]     7.311%    
Mortgages, loans payable and other obligations     $ 18,273 18,542  
Loan maturity date     Feb. 01, 2019    
One River Center [Member]          
Debt Instrument [Line Items]          
Property Name [11]     One River Center (k)    
Lender [11]     Guardian Life Insurance Co.    
Effective rate [3],[11]     7.311%    
Mortgages, loans payable and other obligations [11]     $ 41,859 42,476  
Loan maturity date [11]     Feb. 01, 2019    
Number of properties used to collateralized mortgage | property     3    
Park Square [Member]          
Debt Instrument [Line Items]          
Property Name     Park Square    
Lender     Wells Fargo Bank N.A.    
LIBOR [3],[12]     LIBOR+1.872    
Property Debt, Interest Rate, Spread Over LIBOR [12]     1.872%    
Mortgages, loans payable and other obligations     $ 27,500 27,500  
Loan maturity date     Apr. 10, 2019    
Deferred financing costs amortization interest rate     0.122%    
Port Imperial South 4/5 Retail [Member]          
Debt Instrument [Line Items]          
Property Name     Port Imperial South 4/5 Retail    
Lender     American General Life & A/G PC    
Effective rate [3]     4.559%    
Mortgages, loans payable and other obligations     $ 4,000 4,000  
Loan maturity date     Dec. 01, 2021    
Port Imperial South 4/5 Garage [Member]          
Debt Instrument [Line Items]          
Property Name     Port Imperial South 4/5 Garage    
Lender     American General Life & A/G PC    
Effective rate [3]     4.853%    
Mortgages, loans payable and other obligations     $ 32,600 $ 32,600  
Loan maturity date     Dec. 01, 2029    
Unsecured Revolving Credit Facility [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity     $ 600,000    
Number of extension options | item     2    
Unsecured Revolving Credit Facility [Member] | Overlook - Site IIID, IIIC, IIIA, And IIB [Member] | Minimum [Member]          
Debt Instrument [Line Items]          
Property Debt, Interest Rate, Spread Over LIBOR 2.50%        
Unsecured Revolving Credit Facility [Member] | Overlook - Site IIID, IIIC, IIIA, And IIB [Member] | Maximum [Member]          
Debt Instrument [Line Items]          
Property Debt, Interest Rate, Spread Over LIBOR 3.50%        
Consolidated Land [Member] | Overlook Ridge Properties [Member]          
Debt Instrument [Line Items]          
Percentage of interest in developable land   100.00%      
Consolidated Land [Member] | Overlook Ridge Properties [Member] | Minimum [Member]          
Debt Instrument [Line Items]          
Property Debt, Interest Rate, Spread Over LIBOR   2.50%      
Consolidated Land [Member] | Overlook Ridge Properties [Member] | Maximum [Member]          
Debt Instrument [Line Items]          
Property Debt, Interest Rate, Spread Over LIBOR   3.50%      
[1] On March 27, 2015, the Company repaid these loans, which had interest rates ranging from LIBOR plus 2.50 to 3.50 percent, at par, using borrowings on the Company's unsecured revolving credit facility.
[2] During the year ended December 31, 2015, the Company transferred the deeds for these properties to the lender in satisfaction of its obligations on the loans with interest rates ranging from 10.260% to 19.450%. See Note 3: Recent Transactions - Dispositions.
[3] 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.
[4] Mortgage is cross collateralized by the four properties. The loan was not repaid at maturity and the Company is in discussions with the lender regarding potential options in satisfaction of the obligation.
[5] Excess cash flow, as defined, is being held by the lender for re-leasing costs. The deed for the property was placed in escrow and is available to the lender in the event of default or non-payment at maturity. The mortgage loan was not repaid at maturity on May 1, 2015. The Company is in discussions with the lender regarding a further extension of the loan.
[6] The loan was repaid in full at maturity, using borrowings from the Company's revolving credit facility.
[7] The Company owns a 50 percent tenants-in-common interest in the Curtis Center property. The Company's $64.0 million loan consists of its 50 percent interest in a $102 million senior loan with a current rate of 3.491 percent at December 31, 2015 and its 50 percent interest in a $26 million mezzanine loan (with a maximum borrowing capacity of $48 million) with a current rate of 9.831 percent at December 31, 2015. The senior loan rate is based on a floating rate of one-month LIBOR plus 329 basis points and the mezzanine loan rate is based on a floating rate of one-month LIBOR plus 950 basis points. The Company has entered into LIBOR caps for the periods of the loans. The loans provide for three one-year extension options.
[8] The effective interest rate includes amortization of deferred financing costs of 1.362 percent.
[9] Mortgage is cross collateralized by seven properties. The Company has agreed, subject to certain conditions, to guarantee repayment of $61.1 million of the loan.
[10] This construction loan has a maximum borrowing capacity of $28.8 million.
[11] Mortgage is collateralized by the three properties comprising One River Center
[12] The effective interest rate includes amortization of deferred financing costs of 0.122 percent.