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)
 9 Months Ended
May 05, 2016
USD ($)
Apr. 22, 2016
USD ($)
Sep. 30, 2016
USD ($)
property
item
Sep. 30, 2015
USD ($)
Jul. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Debt Instrument [Line Items]            
Principal balance outstanding     $ 2,455,309,000     $ 2,145,393,000
Repayment of mortgages, loans payable and other obligations     187,969,000 $ 29,307,000    
Loss from extinguishment of debt, net     $ 12,420,000      
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%      
Port Imperial 4/5 Hotel [Member] | Construction Loan [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity     $ 94,000,000      
Secured Debt [Member]            
Debt Instrument [Line Items]            
Principal balance outstanding     1,069,012,000     731,624,000
Adjustment for unamortized debt discount         (548,000)
Unamortized deferred financing costs     (7,808,000)     (4,465,000)
Total mortgages, loans payable and other obligations, net     $ 1,061,204,000     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%      
Principal balance outstanding [3]         63,279,000
Repayment of mortgages, loans payable and other obligations   $ 51,500,000        
Loss from extinguishment of debt, net   $ 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%      
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]     11.26%      
Principal balance outstanding     $ 40,180,000     40,631,000
Loan maturity date [5]     May 11, 2016      
Secured Debt [Member] | Various [Member]            
Debt Instrument [Line Items]            
Property Name [6]     Various      
Lender [6]     Prudential Insurance      
Effective rate [2],[6]     6.332%      
Principal balance outstanding [6]     $ 141,894,000     143,513,000
Loan maturity date [6]     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 [7]     150 Main St.      
Lender [7]     Webster Bank      
LIBOR [2],[7]     LIBOR+2.35      
Spread over LIBOR     2.35%      
Principal balance outstanding [7]     $ 25,159,000     10,937,000
Loan maturity date [7]     Mar. 30, 2017      
Secured Debt [Member] | 150 Main St [Member] | Construction Loan [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity     $ 28,800,000      
Secured Debt [Member] | Curtis Center [Member]            
Debt Instrument [Line Items]            
Property Name [8]     Curtis Center      
Lender [8]     CCRE & PREFG      
LIBOR [2],[8],[9]     LIBOR+5.912      
Spread over LIBOR [9]     5.912%      
Principal balance outstanding [8]     $ 75,000,000     64,000,000
Loan maturity date [8]     Oct. 09, 2017      
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%      
Secured Debt [Member] | Curtis Center [Member] | Senior Loan [Member]            
Debt Instrument [Line Items]            
Effective rate     3.8191%      
Spread over LIBOR     3.29%      
Principal balance outstanding     $ 102,000,000      
Percentage of interest in venture     50.00%      
LIBOR measurement period     1 month      
Secured Debt [Member] | Curtis Center [Member] | Mezzanine Loan [Member]            
Debt Instrument [Line Items]            
Effective rate     10.025%      
Spread over LIBOR     9.50%      
Principal balance outstanding     $ 48,000,000      
Percentage of interest in venture     50.00%      
LIBOR measurement period     1 month      
Secured Debt [Member] | 23 Main Street [Member]            
Debt Instrument [Line Items]            
Property Name     23 Main Street      
Lender     JPMorgan CMBS      
Effective rate [2]     5.587%      
Principal balance outstanding     $ 28,020,000     28,541,000
Loan maturity date     Sep. 01, 2018      
Secured Debt [Member] | Port Imperial 4/5 Hotel [Member]            
Debt Instrument [Line Items]            
Property Name [10]     Port Imperial 4/5 Hotel      
Lender [10]     Fifth Third Bank & Santander      
LIBOR [2],[10]     LIBOR+4.50      
Spread over LIBOR     4.50%      
Principal balance outstanding [10]     $ 8,311,000      
Loan maturity date [10]     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%      
Principal balance outstanding     $ 214,690,000     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      
Lender [11]     Fifth Third Bank      
LIBOR [2],[11]     LIBOR+2.25      
Spread over LIBOR     2.25%      
Principal balance outstanding [11]     $ 23,599,000      
Loan maturity date [11]     Dec. 15, 2018      
Secured Debt [Member] | Chase II Project [Member] | Construction Loan [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity     $ 48,000,000      
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%      
Principal balance outstanding     $ 18,058,000     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%      
Principal balance outstanding [12]     $ 41,367,000     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
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      
LIBOR [2],[14]     LIBOR+2.35      
Spread over LIBOR     2.35%      
Principal balance outstanding [14]     $ 7,136,000      
Loan maturity date [14]     Nov. 24, 2019      
Secured Debt [Member] | Port Imperial South 11 [Member] | Construction Loan [Member]            
Debt Instrument [Line Items]            
Maximum borrowing capacity     $ 78,000,000      
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%      
Principal balance outstanding     $ 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%      
Principal balance outstanding     $ 72,500,000      
Loan maturity date     Feb. 01, 2023      
Secured Debt [Member] | Portside 7 [Member]            
Debt Instrument [Line Items]            
Property Name [15]     Portside 7      
Lender [15]     CBRE Capital Markets/FreddieMac      
Effective rate [2],[15]     3.569%      
Principal balance outstanding     $ 58,998,000 [15]   $ 42,500,000  
Loan maturity date [15]     Aug. 01, 2023      
Secured Debt [Member] | 101 Hudson Street [Member]            
Debt Instrument [Line Items]            
Property Name [16]     101 Hudson      
Lender [16]     Wells Fargo CMBS      
Effective rate [2],[16],[17]     3.197%      
Principal balance outstanding [16]     $ 250,000,000      
Loan maturity date [16]     Oct. 11, 2026      
Secured Debt [Member] | 101 Hudson Street [Member] | Construction Loan [Member]            
Debt Instrument [Line Items]            
Deferred financing costs amortization interest rate     0.0798%      
Secured Debt [Member] | 101 Hudson Street - In Escrow [Member]            
Debt Instrument [Line Items]            
Principal balance outstanding     $ 19,200,000      
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%      
Principal balance outstanding     $ 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, which is included in loss on extinguishment of debt, net.
[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] 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.
[7] This construction loan has a maximum borrowing capacity of $28.8 million.
[8] 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 3.8191 percent at September 30, 2016 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 10.025 percent at September 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. In October 2016, the first of three one-year extension options was exercised by the venture.
[9] The effective interest rate includes amortization of deferred financing costs of 1.362 percent.
[10] This construction loan has a maximum borrowing capacity of $94 million.
[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.
[15] This mortgage loan was obtained by the Company in July 2016 to replace a $42.5 million mortgage loan that was in place at the property acquisition date of April 1, 2016.
[16] This mortgage loan was obtained by the Company on September 30, 2016. $19.2 million of the mortgage loan principal was placed in escrow accounts directly by the lender at the loan closing.
[17] The effective interest rate includes amortization of deferred financing costs of 0.0798 percent.