Annual report pursuant to Section 13 and 15(d)

Recent Transactions (Consolidation) (Narrative) (Details)

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Recent Transactions (Consolidation) (Narrative) (Details)
12 Months Ended
Mar. 12, 2020
USD ($)
ft²
Dec. 31, 2021
USD ($)
ft²
item
Dec. 31, 2020
USD ($)
ft²
item
Dec. 31, 2019
USD ($)
Real Estate Properties [Line Items]        
Area of property (in square feet) | ft²   3,049,313 2,725,639  
Purchase price of property   $ 65,101,000 $ 138,688,000 $ 88,240,000
Gain on change of control of interests       $ 13,790,000
Loan balance   2,400,000,000 2,800,000,000  
Total noncontrolling interests in subsidiaries   $ 167,436,000 $ 193,563,000  
Number of units | item   506 326  
Unconsolidated Joint Venture Multi-Family Properties [Member]        
Real Estate Properties [Line Items]        
Number of units | item   2,146    
Port Imperial North Retail, L.L.C. [Member]        
Real Estate Properties [Line Items]        
Total consolidated net assets   $ 15,033,000    
Port Imperial North Retail, L.L.C. [Member] | Unconsolidated Joint Venture Multi-Family Properties [Member]        
Real Estate Properties [Line Items]        
Percentage of additional interest acquired 80.00%      
Area of property (in square feet) | ft² 30,745      
Purchase price of property $ 13,300,000      
Gain on change of control of interests   0    
Total consolidated net assets   $ 15,000,000.0