Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Mortgages, Loans Payable And Other Obligations (Summary Of Mortgages, Loans Payable And Other Obligations) (Details)
3 Months Ended
Jan. 31, 2019
USD ($)
Mar. 31, 2019
USD ($)
item
Mar. 31, 2018
USD ($)
Jan. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
Debt Instrument [Line Items]          
Principal balance outstanding   $ 2,686,317,000     $ 2,792,651,000
Borrowings from revolving credit facility   92,000,000 $ 322,000,000    
Payment for borrowings   204,000,000 $ 281,000,000    
Secured Debt [Member]          
Debt Instrument [Line Items]          
Principal balance outstanding   1,536,346,000     1,440,396,000
Unamortized deferred financing costs   9,441,000     8,998,000
Total mortgages, loans payable and other obligations, net   $ 1,526,905,000     1,431,398,000
Secured Debt [Member] | Park Square [Member]          
Debt Instrument [Line Items]          
Property Name   Park Square      
Lender   Wells Fargo Bank N.A.      
LIBOR   LIBOR+1.87      
Spread over LIBOR   1.87%      
Principal balance outstanding       25,167,000
Loan maturity date   Apr. 10, 2019      
Secured Debt [Member] | 250 Johnson Road [Member]          
Debt Instrument [Line Items]          
Property Name   250 Johnson      
Lender   M&T Bank      
LIBOR   LIBOR+2.35      
Spread over LIBOR   2.35%      
Principal balance outstanding   $ 42,000,000     41,769,000
Loan maturity date   May 20, 2019      
Secured Debt [Member] | 250 Johnson Road [Member] | Construction Loan [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 42,000,000      
Loan extension period   1 year      
Extension fee   0.25%      
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      
LIBOR   LIBOR+4.50      
Spread over LIBOR   4.50%      
Principal balance outstanding   $ 76,665,000     73,350,000
Loan maturity date   Oct. 06, 2019      
Secured Debt [Member] | Port Imperial 4/5 Hotel [Member] | Construction Loan [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 94,000,000      
Number of extension options | item   2      
Loan extension period   1 year      
Extension fee   0.20%      
Secured Debt [Member] | Worcester [Member]          
Debt Instrument [Line Items]          
Property Name   Worcester      
Lender   Citizens Bank      
LIBOR   LIBOR+2.50      
Spread over LIBOR   2.50%      
Principal balance outstanding   $ 57,883,000     56,892,000
Loan maturity date   Dec. 10, 2019      
Secured Debt [Member] | Worcester [Member] | Construction Loan [Member]          
Debt Instrument [Line Items]          
Maximum borrowing capacity   $ 58,000,000      
Number of extension options | item   2      
Loan extension period   1 year      
Extension fee   0.15%      
Secured Debt [Member] | Monaco [Member]          
Debt Instrument [Line Items]          
Property Name   Monaco      
Lender   The Northwestern Mutual Life Insurance Co.      
Effective rate   3.15%      
Principal balance outstanding   $ 167,966,000     168,370,000
Loan maturity date   Feb. 01, 2021      
Adjustment for unamortized debt discount   $ 3,000,000      
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   4.56%      
Principal balance outstanding   $ 3,984,000     4,000,000
Loan maturity date   Dec. 01, 2021      
Secured Debt [Member] | Portside 7 [Member]          
Debt Instrument [Line Items]          
Property Name   Portside 7      
Lender   CBRE Capital Markets/FreddieMac      
Effective rate   3.57%      
Principal balance outstanding   $ 58,998,000     58,998,000
Loan maturity date   Aug. 01, 2023      
Secured Debt [Member] | Alterra I & II [Member]          
Debt Instrument [Line Items]          
Property Name   Alterra I & II      
Lender   Capital One/FreddieMac      
Effective rate   3.85%      
Principal balance outstanding   $ 100,000,000     100,000,000
Loan maturity date   Feb. 01, 2024      
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   3.74%      
Principal balance outstanding   $ 135,750,000     135,750,000
Loan maturity date   Jan. 01, 2025      
Secured Debt [Member] | Portside 5/6 [Member]          
Debt Instrument [Line Items]          
Property Name   Portside 5/6      
Lender   New York Life Insurance Company      
Effective rate   4.56%      
Principal balance outstanding   $ 97,000,000     97,000,000
Loan maturity date   Mar. 10, 2026      
Secured Debt [Member] | Marbella I [Member]          
Debt Instrument [Line Items]          
Property Name   Marbella      
Lender   New York Life Insurance Company      
Effective rate   4.17%      
Principal balance outstanding   $ 131,000,000     131,000,000
Loan maturity date   Aug. 10, 2026      
Secured Debt [Member] | Marbella II [Member]          
Debt Instrument [Line Items]          
Property Name   Marbella II      
Lender   New York Life Insurance Company      
Effective rate   4.29%      
Principal balance outstanding   $ 117,000,000      
Loan maturity date   Aug. 10, 2026      
Secured Debt [Member] | 101 Hudson [Member]          
Debt Instrument [Line Items]          
Property Name   101 Hudson      
Lender   Wells Fargo CMBS      
Effective rate   3.20%      
Principal balance outstanding   $ 250,000,000     250,000,000
Loan maturity date   Oct. 11, 2026      
Secured Debt [Member] | Short Hills Portfolio [Member]          
Debt Instrument [Line Items]          
Property Name   Short Hills Portfolio      
Lender   Wells Fargo CMBS      
Effective rate   4.15%      
Principal balance outstanding   $ 124,500,000     124,500,000
Loan maturity date   Apr. 01, 2027      
Secured Debt [Member] | 150 Main St [Member]          
Debt Instrument [Line Items]          
Property Name   150 Main St.      
Lender   Natixis Real Estate Capital LLC      
Effective rate   4.48%      
Principal balance outstanding   $ 41,000,000     41,000,000
Loan maturity date   Aug. 05, 2027      
Secured Debt [Member] | Port Imperial South 11 [Member]          
Debt Instrument [Line Items]          
Property Name   Port Imperial South 11      
Lender   The Northwestern Mutual Life Insurance Co.      
Effective rate   4.52%      
Principal balance outstanding   $ 100,000,000     100,000,000
Loan maturity date   Jan. 10, 2029      
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   4.85%      
Principal balance outstanding   $ 32,600,000     $ 32,600,000
Loan maturity date   Dec. 01, 2029      
Unconsolidated Joint Venture Multi-Family Properties [Member] | Marbella II [Member]          
Debt Instrument [Line Items]          
Percentage of additional interest acquired 50.00%        
Mortgage loan $ 117,000,000     $ 74,700,000