Mortgages, Loans Payable And Other Obligations (Tables) - Secured Debt [Member]
   | 
3 Months Ended | 
Mar. 31, 2017  | 
| Debt Instrument [Line Items] | 
 
 | 
| Summary Of Mortgages, Loans Payable And Other Obligations | 
 
		
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						Effective 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						March 31, 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						December 31, 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Property/Project Name 
				 | 
				
					 
						Lender 
				 | 
				
					 
						  
				 | 
				
					 
						Rate (a) 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						2017 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						2016 
				 | 
				
					 
						  
				 | 
				
					 
						Maturity 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						150 Main St.  
				 | 
				
					 
						Webster Bank 
				 | 
				
					 
						LIBOR+2.35 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				28,540 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				26,642 
				 | 
				
					 
						  
				 | 
				
					 
						08/01/17 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Curtis Center (b) 
				 | 
				
					 
						CCRE & PREFG 
				 | 
				
					 
						LIBOR+5.912 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				75,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				75,000 
				 | 
				
					 
						  
				 | 
				
					 
						10/09/17 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						23 Main Street 
				 | 
				
					 
						Berkadia CMBS 
				 | 
				
					 
						  
				 | 
				5.587 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				27,650 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				27,838 
				 | 
				
					 
						  
				 | 
				
					 
						09/01/18 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Port Imperial 4/5 Hotel (c) 
				 | 
				
					 
						Fifth Third Bank & Santander 
				 | 
				
					 
						LIBOR+4.50 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				24,530 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				14,919 
				 | 
				
					 
						  
				 | 
				
					 
						10/06/18 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Harborside Plaza 5 
				 | 
				
					 
						The Northwestern Mutual Life 
				 | 
				
					 
						  
				 | 
				6.842 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				212,572 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				213,640 
				 | 
				
					 
						  
				 | 
				
					 
						11/01/18 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						Insurance Co. & New York Life  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						Insurance Co. 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Chase II (d) 
				 | 
				
					 
						Fifth Third Bank 
				 | 
				
					 
						LIBOR+2.25 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				40,317 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				34,708 
				 | 
				
					 
						  
				 | 
				
					 
						12/16/18 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						One River Center (e) 
				 | 
				
					 
						Guardian Life Insurance Co. 
				 | 
				
					 
						  
				 | 
				7.311 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				41,024 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				41,197 
				 | 
				
					 
						  
				 | 
				
					 
						02/01/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Park Square 
				 | 
				
					 
						Wells Fargo Bank N.A. 
				 | 
				
					 
						LIBOR+1.872 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				27,500 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				27,500 
				 | 
				
					 
						  
				 | 
				
					 
						04/10/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						250 Johnson (f) 
				 | 
				
					 
						M&T Bank 
				 | 
				
					 
						LIBOR+2.35 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				6,147 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				2,440 
				 | 
				
					 
						  
				 | 
				
					 
						05/20/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Portside 5/6 (g) 
				 | 
				
					 
						Citizens Bank 
				 | 
				
					 
						LIBOR+2.50 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				8,084 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						09/19/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Port Imperial South 11  (h) 
				 | 
				
					 
						JPMorgan Chase 
				 | 
				
					 
						LIBOR+2.35 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				22,246 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				14,073 
				 | 
				
					 
						  
				 | 
				
					 
						11/24/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Worcester (i) 
				 | 
				
					 
						Citizens Bank 
				 | 
				
					 
						LIBOR+2.50 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				5,036 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						12/10/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Port Imperial South 4/5 Retail 
				 | 
				
					 
						American General Life & A/G PC 
				 | 
				
					 
						  
				 | 
				4.559 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				4,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				4,000 
				 | 
				
					 
						  
				 | 
				
					 
						12/01/21 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						The Chase at Overlook Ridge 
				 | 
				
					 
						New York Community Bank 
				 | 
				
					 
						  
				 | 
				3.740 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				72,500 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				72,500 
				 | 
				
					 
						  
				 | 
				
					 
						02/01/23 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Portside 7  
				 | 
				
					 
						CBRE Capital Markets/ 
				 | 
				3.569 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				58,998 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				58,998 
				 | 
				
					 
						  
				 | 
				
					 
						08/01/23 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						FreddieMac 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Alterra I & II 
				 | 
				
					 
						Capital One/FreddieMac 
				 | 
				
					 
						  
				 | 
				3.854 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				100,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						02/01/24 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						101 Hudson 
				 | 
				
					 
						Wells Fargo CMBS 
				 | 
				
					 
						  
				 | 
				3.197 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				250,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				250,000 
				 | 
				
					 
						  
				 | 
				
					 
						10/11/26 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Short Hills office buildings (j) 
				 | 
				
					 
						Wells Fargo CMBS 
				 | 
				
					 
						  
				 | 
				4.149 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				124,500 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						04/01/27 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Port Imperial South 4/5 Garage 
				 | 
				
					 
						American General Life & A/G PC 
				 | 
				
					 
						  
				 | 
				4.853 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				32,600 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				32,600 
				 | 
				
					 
						  
				 | 
				
					 
						12/01/29 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Principal balance outstanding 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				1,161,244 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				896,055 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Unamortized deferred financing costs 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				(8,801)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				(7,470)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Total mortgages, loans payable and other obligations, net 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				1,152,443 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				888,585 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
		  
		
			
		 
		
			
		 
		
			
		 
		
			
		 
		
			
		 
		
			
		 
		
			
		 
		
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						(a) 
				 | 
				
					 
						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. 
				 | 
			 
			
				| 
					 
						(b) 
				 | 
				
					 
						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 4.207 percent at March 31, 2017 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 10.413 percent at March 31, 2017.  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. 
				 | 
			 
			
				| 
					 
						(c) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $94 million. 
				 | 
			 
			
				| 
					 
						(d) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $48 million. 
				 | 
			 
			
				| 
					 
						(e) 
				 | 
				
					 
						Mortgage is collateralized by the three properties comprising One River Center.  
				 | 
			 
			
				| 
					 
						(f) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $42 million. 
				 | 
			 
			
				| 
					 
						(g) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $73 million. 
				 | 
			 
			
				| 
					 
						(h) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $78 million. 
				 | 
			 
			
				| 
					 
						(i) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $58 million. 
				 | 
			 
			
				| 
					 
						(j) 
				 | 
				
					 
						This mortgage loan was obtained by the Company in March 2017 to partially fund the acquisition of the Short Hills/Madison portfolio. 
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
			 
		  
		
			 
		 
		  
	   
 | 
| Mack-Cali Realty LP [Member] | 
 
 | 
| Debt Instrument [Line Items] | 
 
 | 
| Summary Of Mortgages, Loans Payable And Other Obligations | 
 
		
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						Effective 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						March 31, 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						December 31, 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Property/Project Name 
				 | 
				
					 
						Lender 
				 | 
				
					 
						  
				 | 
				
					 
						Rate (a) 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						2017 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						2016 
				 | 
				
					 
						  
				 | 
				
					 
						Maturity 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						150 Main St.  
				 | 
				
					 
						Webster Bank 
				 | 
				
					 
						LIBOR+2.35 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				28,540 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				26,642 
				 | 
				
					 
						  
				 | 
				
					 
						08/01/17 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Curtis Center (b) 
				 | 
				
					 
						CCRE & PREFG 
				 | 
				
					 
						LIBOR+5.912 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				75,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				75,000 
				 | 
				
					 
						  
				 | 
				
					 
						10/09/17 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						23 Main Street 
				 | 
				
					 
						Berkadia CMBS 
				 | 
				
					 
						  
				 | 
				5.587 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				27,650 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				27,838 
				 | 
				
					 
						  
				 | 
				
					 
						09/01/18 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Port Imperial 4/5 Hotel (c) 
				 | 
				
					 
						Fifth Third Bank & Santander 
				 | 
				
					 
						LIBOR+4.50 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				24,530 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				14,919 
				 | 
				
					 
						  
				 | 
				
					 
						10/06/18 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Harborside Plaza 5 
				 | 
				
					 
						The Northwestern Mutual Life 
				 | 
				
					 
						  
				 | 
				6.842 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				212,572 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				213,640 
				 | 
				
					 
						  
				 | 
				
					 
						11/01/18 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						Insurance Co. & New York Life  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						Insurance Co. 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Chase II (d) 
				 | 
				
					 
						Fifth Third Bank 
				 | 
				
					 
						LIBOR+2.25 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				40,317 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				34,708 
				 | 
				
					 
						  
				 | 
				
					 
						12/16/18 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						One River Center (e) 
				 | 
				
					 
						Guardian Life Insurance Co. 
				 | 
				
					 
						  
				 | 
				7.311 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				41,024 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				41,197 
				 | 
				
					 
						  
				 | 
				
					 
						02/01/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Park Square 
				 | 
				
					 
						Wells Fargo Bank N.A. 
				 | 
				
					 
						LIBOR+1.872 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				27,500 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				27,500 
				 | 
				
					 
						  
				 | 
				
					 
						04/10/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						250 Johnson (f) 
				 | 
				
					 
						M&T Bank 
				 | 
				
					 
						LIBOR+2.35 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				6,147 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				2,440 
				 | 
				
					 
						  
				 | 
				
					 
						05/20/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Portside 5/6 (g) 
				 | 
				
					 
						Citizens Bank 
				 | 
				
					 
						LIBOR+2.50 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				8,084 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						09/19/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Port Imperial South 11  (h) 
				 | 
				
					 
						JPMorgan Chase 
				 | 
				
					 
						LIBOR+2.35 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				22,246 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				14,073 
				 | 
				
					 
						  
				 | 
				
					 
						11/24/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Worcester (i) 
				 | 
				
					 
						Citizens Bank 
				 | 
				
					 
						LIBOR+2.50 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				5,036 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						12/10/19 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Port Imperial South 4/5 Retail 
				 | 
				
					 
						American General Life & A/G PC 
				 | 
				
					 
						  
				 | 
				4.559 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				4,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				4,000 
				 | 
				
					 
						  
				 | 
				
					 
						12/01/21 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						The Chase at Overlook Ridge 
				 | 
				
					 
						New York Community Bank 
				 | 
				
					 
						  
				 | 
				3.740 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				72,500 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				72,500 
				 | 
				
					 
						  
				 | 
				
					 
						02/01/23 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Portside 7  
				 | 
				
					 
						CBRE Capital Markets/ 
				 | 
				3.569 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				58,998 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				58,998 
				 | 
				
					 
						  
				 | 
				
					 
						08/01/23 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						FreddieMac 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Alterra I & II 
				 | 
				
					 
						Capital One/FreddieMac 
				 | 
				
					 
						  
				 | 
				3.854 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				100,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						02/01/24 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						101 Hudson 
				 | 
				
					 
						Wells Fargo CMBS 
				 | 
				
					 
						  
				 | 
				3.197 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				250,000 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				250,000 
				 | 
				
					 
						  
				 | 
				
					 
						10/11/26 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Short Hills office buildings (j) 
				 | 
				
					 
						Wells Fargo CMBS 
				 | 
				
					 
						  
				 | 
				4.149 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				124,500 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  - 
				 | 
				
					 
						  
				 | 
				
					 
						04/01/27 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Port Imperial South 4/5 Garage 
				 | 
				
					 
						American General Life & A/G PC 
				 | 
				
					 
						  
				 | 
				4.853 
				 | 
				
					 
						% 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				32,600 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				32,600 
				 | 
				
					 
						  
				 | 
				
					 
						12/01/29 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Principal balance outstanding 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				1,161,244 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				896,055 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Unamortized deferred financing costs 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				(8,801)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				(7,470)
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						Total mortgages, loans payable and other obligations, net 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				1,152,443 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				888,585 
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						  
				 | 
			 
		  
		
			
		 
		
			
		 
		
			
		 
		
			
		 
		
			
		 
		
			
		 
		
			
		 
		
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
			 
			
				| 
					 
						(a) 
				 | 
				
					 
						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. 
				 | 
			 
			
				| 
					 
						(b) 
				 | 
				
					 
						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 4.207 percent at March 31, 2017 and its 50 percent interest in a $48 million mezzanine loan with a current rate of 10.413 percent at March 31, 2017.  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. 
				 | 
			 
			
				| 
					 
						(c) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $94 million. 
				 | 
			 
			
				| 
					 
						(d) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $48 million. 
				 | 
			 
			
				| 
					 
						(e) 
				 | 
				
					 
						Mortgage is collateralized by the three properties comprising One River Center.  
				 | 
			 
			
				| 
					 
						(f) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $42 million. 
				 | 
			 
			
				| 
					 
						(g) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $73 million. 
				 | 
			 
			
				| 
					 
						(h) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $78 million. 
				 | 
			 
			
				| 
					 
						(i) 
				 | 
				
					 
						This construction loan has a maximum borrowing capacity of $58 million. 
				 | 
			 
			
				| 
					 
						(j) 
				 | 
				
					 
						This mortgage loan was obtained by the Company in March 2017 to partially fund the acquisition of the Short Hills/Madison portfolio. 
				 | 
			 
			
				| 
					 
						 
				 | 
				
					 
						  
				 | 
			 
		  
		
			 
		 
		  
	   
 |