Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Tax Abatement Agreements) (Narrative) (Details)

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Commitments And Contingencies (Tax Abatement Agreements) (Narrative) (Details) - USD ($)
 3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Harborside Financial Center Plaza 4-A [Member]    
Commitments And Contingencies [Line Items]    
Project period 20 years  
Percentage of PILOT on project costs 2.00%  
Total project costs $ 49,500,000  
Payments in lieu of property taxes (PILOT) $ 247,000 $ 247,000
Harborside Financial Center Plaza 5 [Member]    
Commitments And Contingencies [Line Items]    
Project period 20 years  
Percentage of PILOT on project costs 2.00%  
Total project costs $ 170,900,000  
Payments in lieu of property taxes (PILOT) $ 854,000 $ 854,000
Port Imperial South 4/5 Garage [Member]    
Commitments And Contingencies [Line Items]    
Project period 5 years  
Period of real estate taxes phase in 5 years