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)
 3 Months Ended 6 Months Ended
May 05, 2016
USD ($)
Apr. 22, 2016
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2016
USD ($)
property
item
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]            
Principal balance outstanding     $ 2,256,955,000 $ 2,256,955,000   $ 2,145,393,000
Repayment of mortgages, loans payable and other obligations       143,322,000 $ 27,251,000  
Gain from extinguishment of debt     $ 12,420,000 $ 12,420,000    
Minimum [Member]            
Debt Instrument [Line Items]            
Percentage of interest in venture     7.50% 7.50%    
Maximum [Member]            
Debt Instrument [Line Items]            
Percentage of interest in venture     85.00% 85.00%    
Chase II Project [Member] | Construction Loan [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity     $ 48,000,000 $ 48,000,000    
Port Imperial South 11 [Member] | Construction Loan [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity     78,000,000 78,000,000    
Secured Debt [Member]            
Debt Instrument [Line Items]            
Principal balance outstanding     774,798,000 774,798,000   731,624,000
Adjustment for unamortized debt discount       (548,000)
Unamortized deferred financing costs     (5,375,000) (5,375,000)   (4,465,000)
Total mortgages, loans payable and other obligations, net     769,423,000 $ 769,423,000   726,611,000
Secured Debt [Member] | Port Imperial South [Member]            
Debt Instrument [Line Items]            
Property Name [1]       Port Imperial South    
Lender [1]       Wells Fargo Bank N.A.    
LIBOR [1],[2]       LIBOR+1.75    
Spread over LIBOR       1.75%    
Principal balance outstanding [1]       34,962,000
Secured Debt [Member] | 6 Becker, 85 Livingston, 75 Livingston & 20 Waterview [Member]            
Debt Instrument [Line Items]            
Property Name [3]       6 Becker, 85 Livingston, 75 Livingston & 20 Waterview    
Lender [3]       Wells Fargo CMBS    
Effective rate [2],[3]     10.26% 10.26%    
Principal balance outstanding [3]       63,279,000
Repayment of mortgages, loans payable and other obligations   $ 51,500,000        
Gain from extinguishment of debt   $ 12,400,000        
Secured Debt [Member] | 9200 Edmonston Road [Member]            
Debt Instrument [Line Items]            
Property Name [4]       9200 Edmonston Road    
Lender [4]       Principal Commercial Funding L.L.C.    
Effective rate [2],[4]     9.78% 9.78%    
Principal balance outstanding [4]       3,793,000
Gain on sale $ 200,000          
Secured Debt [Member] | 4 Becker [Member]            
Debt Instrument [Line Items]            
Property Name       4 Becker    
Lender       Wells Fargo CMBS    
Effective rate [2]     9.55% 9.55%    
Principal balance outstanding     $ 40,330,000 $ 40,330,000   40,631,000
Loan maturity date [5]       May 11, 2016    
Secured Debt [Member] | Curtis Center [Member]            
Debt Instrument [Line Items]            
Property Name [6]       Curtis Center    
Lender [6]       CCRE & PREFG    
LIBOR [2],[6],[7]       LIBOR+5.912    
Spread over LIBOR [7]       5.912%    
Principal balance outstanding [6]     $ 75,000,000 $ 75,000,000   64,000,000
Loan maturity date [6]       Oct. 09, 2016    
Percentage of interest in venture     50.00% 50.00%    
Number of extension options | item       3    
Loan extension period       1 year    
Deferred financing costs amortization interest rate       1.362%    
Secured Debt [Member] | Curtis Center [Member] | Senior Loan [Member]            
Debt Instrument [Line Items]            
Effective rate     3.7371% 3.7371%    
Spread over LIBOR       3.29%    
Principal balance outstanding     $ 102,000,000 $ 102,000,000    
Percentage of interest in venture     50.00% 50.00%    
LIBOR measurement period       1 month    
Secured Debt [Member] | Curtis Center [Member] | Mezzanine Loan [Member]            
Debt Instrument [Line Items]            
Effective rate     9.943% 9.943%    
Spread over LIBOR       9.50%    
Principal balance outstanding     $ 48,000,000 $ 48,000,000    
Percentage of interest in venture     50.00% 50.00%    
LIBOR measurement period       1 month    
Secured Debt [Member] | Various [Member]            
Debt Instrument [Line Items]            
Property Name [8]       Various    
Lender [8]       Prudential Insurance    
Effective rate [2],[8]     6.332% 6.332%    
Principal balance outstanding [8]     $ 142,443,000 $ 142,443,000   143,513,000
Loan maturity date [8]       Jan. 15, 2017    
Number of properties used to collateralized mortgage | property       7    
Repayment of mortgages, loans payable and other obligations       $ 61,100,000    
Secured Debt [Member] | 150 Main St [Member]            
Debt Instrument [Line Items]            
Property Name [9]       150 Main St.    
Lender [9]       Webster Bank    
LIBOR [2],[9]       LIBOR+2.35    
Spread over LIBOR       2.35%    
Principal balance outstanding [9]     20,929,000 $ 20,929,000   10,937,000
Loan maturity date [9]       Mar. 30, 2017    
Secured Debt [Member] | 150 Main St [Member] | Construction Loan [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity     $ 28,800,000 $ 28,800,000    
Secured Debt [Member] | Portside 7 [Member]            
Debt Instrument [Line Items]            
Property Name [10]       Portside 7    
Lender [10]       RBS Citizens N.A. & Salem Five Cents Savings Bank    
Effective rate [2],[10]     2.15% 2.15%    
Spread over LIBOR       2.15%    
Principal balance outstanding [10]     $ 42,500,000 $ 42,500,000    
Secured Debt [Member] | 23 Main Street [Member]            
Debt Instrument [Line Items]            
Property Name       23 Main Street    
Lender       JPMorgan CMBS    
Effective rate [2]     5.587% 5.587%    
Principal balance outstanding     $ 28,195,000 $ 28,195,000   28,541,000
Loan maturity date       Sep. 01, 2018    
Secured Debt [Member] | Port Imperial 4/5 Hotel [Member]            
Debt Instrument [Line Items]            
Property Name       Port Imperial 4/5 Hotel    
Lender       Fifth Third Bank & Santander    
Effective rate [2]     4.50% 4.50%    
Spread over LIBOR       4.50%    
Principal balance outstanding     $ 3,094,000 $ 3,094,000    
Loan maturity date       Oct. 06, 2018    
Secured Debt [Member] | 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 [2]     6.842% 6.842%    
Principal balance outstanding     $ 215,723,000 $ 215,723,000   217,736,000
Loan maturity date       Nov. 01, 2018    
Secured Debt [Member] | Chase II Project [Member]            
Debt Instrument [Line Items]            
Property Name [11]       Chase II (k)    
Lender [11]       Fifth Third Bank    
Effective rate [2],[11]     2.25% 2.25%    
Spread over LIBOR       2.25%    
Principal balance outstanding [11]     $ 8,680,000 $ 8,680,000    
Loan maturity date [11]       Dec. 15, 2018    
Secured Debt [Member] | 100 Walnut Avenue [Member]            
Debt Instrument [Line Items]            
Property Name       100 Walnut Avenue    
Lender       Guardian Life Insurance Co.    
Effective rate [2]     7.311% 7.311%    
Principal balance outstanding     $ 18,131,000 $ 18,131,000   18,273,000
Loan maturity date       Feb. 01, 2019    
Secured Debt [Member] | One River Center [Member]            
Debt Instrument [Line Items]            
Property Name [12]       One River Center    
Lender [12]       Guardian Life Insurance Co.    
Effective rate [2],[12]     7.311% 7.311%    
Principal balance outstanding [12]     $ 41,534,000 $ 41,534,000   41,859,000
Loan maturity date [12]       Feb. 01, 2019    
Number of properties used to collateralized mortgage | property       3    
Secured Debt [Member] | Park Square [Member]            
Debt Instrument [Line Items]            
Property Name       Park Square    
Lender       Wells Fargo Bank N.A.    
LIBOR [2],[13]       LIBOR+1.872    
Spread over LIBOR [13]       1.872%    
Principal balance outstanding     $ 27,500,000 $ 27,500,000   27,500,000
Loan maturity date       Apr. 10, 2019    
Deferred financing costs amortization interest rate       0.122%    
Secured Debt [Member] | Port Imperial South 11 [Member]            
Debt Instrument [Line Items]            
Property Name [14]       Port Imperial South 11    
Lender [14]       JPMorgan Chase    
Effective rate [2],[14]     2.35% 2.35%    
Spread over LIBOR       2.35%    
Principal balance outstanding [14]     $ 1,639,000 $ 1,639,000    
Loan maturity date [14]       Nov. 24, 2019    
Secured Debt [Member] | 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 [2]     4.559% 4.559%    
Principal balance outstanding     $ 4,000,000 $ 4,000,000   4,000,000
Loan maturity date       Dec. 01, 2021    
Secured Debt [Member] | The Chase At Overlook Ridge [Member]            
Debt Instrument [Line Items]            
Property Name       The Chase at Overlook Ridge    
Lender       New York Community Bank    
Effective rate [2]     3.74% 3.74%    
Principal balance outstanding     $ 72,500,000 $ 72,500,000    
Loan maturity date       Feb. 01, 2023    
Secured Debt [Member] | Port Imperial 4/5 Garage Development [Member]            
Debt Instrument [Line Items]            
Property Name       Port Imperial South 4/5 Garage    
Lender       American General Life & A/G PC    
Effective rate [2]     4.853% 4.853%    
Principal balance outstanding     $ 32,600,000 $ 32,600,000   $ 32,600,000
Loan maturity date       Dec. 01, 2029    
[1] On January 19, 2016, the loan was repaid in full at maturity, using borrowings from the Company's revolving credit facility.
[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] On April 22, 2016, the loan was repaid at a discount for $51.5 million, using borrowings from the Company's revolving credit facility. Accordingly, the Company recognized a gain on extinguishment of debt of $12.4 million.
[4] On May 5, 2016, the Company transferred the deed for 9200 Edmonston Road to the lender in satisfaction of its obligations and recorded a gain of $0.2 million.
[5] The Company has begun discussions with the lender regarding the past due maturity of the loan.
[6] The Company owns a 50 percent tenants-in-common interest in the Curtis Center property. The Company's $75 million loan consists of its 50 percent interest in a $102 million senior loan with a current rate of 3.7371 percent at June 30, 2016 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 9.943 percent at June 30, 2016. 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.
[7] The effective interest rate includes amortization of deferred financing costs of 1.362 percent.
[8] 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.
[9] This construction loan has a maximum borrowing capacity of $28.8 million.
[10] On July 8, 2016, the loan was repaid in full from loan refinancing proceeds.
[11] This construction loan has a maximum borrowing capacity of $48 million.
[12] Mortgage is collateralized by the three properties comprising One River Center.
[13] The effective interest rate includes amortization of deferred financing costs of 0.122 percent.
[14] This constuction loan has a maximum borrowing capacity of $78 million.