Annual report pursuant to Section 13 and 15(d)

Recent Transactions (Schedule Of Properties Acquired) (Details)

v3.20.4
Recent Transactions (Schedule Of Properties Acquired) (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
ft²
item
Dec. 31, 2020
USD ($)
Business Acquisition [Line Items]    
Number of Buildings, Acquired | item 3  
Acquisition cost $ 736,919,000  
99 Wood Avenue [Member]    
Business Acquisition [Line Items]    
Number of Buildings, Acquired | item 1  
Rentable Square Feet, Acquired | ft² 271,988  
Acquisition cost $ 61,858,000  
Soho Lofts [Member]    
Business Acquisition [Line Items]    
Number of Buildings, Acquired | item 1  
Rentable Square Feet, Acquired | ft² 377  
Acquisition cost $ 264,578,000  
Liberty Towers [Member]    
Business Acquisition [Line Items]    
Number of Buildings, Acquired | item 1  
Rentable Square Feet, Acquired | ft² 648  
Acquisition cost $ 410,483,000  
Unsecured Revolving Credit Facility [Member] | Liberty Towers [Member]    
Business Acquisition [Line Items]    
Mortgage loan   $ 232,000,000