Annual report pursuant to Section 13 and 15(d)

Disclosure Of Fair Value Of Assets And Liabilities (Narrative) (Details)

v3.22.0.1
Disclosure Of Fair Value Of Assets And Liabilities (Narrative) (Details)
$ in Thousands
1 Months Ended 9 Months Ended 12 Months Ended 15 Months Ended
Mar. 31, 2020
property
Sep. 30, 2020
USD ($)
Dec. 31, 2021
USD ($)
ft²
property
item
Dec. 31, 2020
USD ($)
ft²
property
item
Dec. 31, 2019
USD ($)
May 31, 2021
property
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Fair value of Company's long-term debt     $ 2,400,000 $ 2,900,000    
Principal balance outstanding     $ 2,400,000 $ 2,800,000    
Area of property (in square feet) | ft²     3,049,313 2,725,639    
Land and other impairments, net     $ 23,719 $ 16,817 $ 32,444  
Property impairments   $ 36,600        
Provision for Loan and Lease Losses     200      
Financing Receivable, Allowance for Credit Loss, Period Increase (Decrease)     200      
Office [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Property impairments     6,000      
Hotel Income [Member] | Weehawken, New Jersey [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Property impairments   $ 36,600 $ 7,400      
Properties | property     2 2    
Number of properties closed | property           1
Land Parcels [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Land and other impairments, net     $ 14,300 $ 7,300    
Properties | property       3    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Parsippany, Madison, Short Hills, Edison, And Red Bank, New Jersey [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of properties not expected to recover from estimated net sales proceeds | property       6    
Unrealized gains (losses) on real estate held for sale       $ (15,700)    
Number of disposal groups | item       3    
Land and other impairments, net       $ 9,500    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Office [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of real estate properties | property       16    
Area of property (in square feet) | ft²       3,000,000.0    
Number of disposal groups | item       6    
Property impairments     $ 6,000      
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Office [Member] | Parsippany, Madison, Short Hills, Edison, And Red Bank, New Jersey [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of properties not expected to recover from estimated net sales proceeds | property       6    
Unrealized gains (losses) on real estate held for sale       $ (15,700)    
Number of real estate properties | property       16    
Properties aggregate net book value       $ 657,000    
Land and other impairments, net       9,500    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Hotel Income [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of real estate properties | property     2      
Property impairments     $ 7,400      
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Adjacent Hotel [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of real estate properties | property     2      
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Land Parcels [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Land and other impairments, net     $ 14,300 $ 7,300    
Properties | property       3    
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Office Properties And Several Developable Land Parcels [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of real estate properties | property     2      
Properties aggregate net book value     $ 618,600      
Number of disposal groups | item     2      
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Several Land Parcels [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Properties aggregate net book value     $ 65,100      
Land and other impairments, net     10,200      
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Land Parcel [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Unrealized gains (losses) on real estate held for sale     3,700      
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | One Office and Land Parcels [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Properties aggregate net book value     24,800      
Disposal Group, Not Discontinued Operations [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Unrealized gains (losses) on real estate held for sale       $ (1,682)    
Disposal Group, Not Discontinued Operations [Member] | Hotel Income [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Number of properties closed | property 1          
Disposal Group, Not Discontinued Operations [Member] | Hotel Income [Member] | Weehawken, New Jersey [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Properties | property       2    
Discontinued Operations [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Unrealized gains (losses) on real estate held for sale     3,700 $ (14,040)    
Land and other impairments, net     $ 10,200      
Gain (loss) on sale of property       25,241    
Discontinued Operations [Member] | Parsippany, Madison, Short Hills, Edison, And Red Bank, New Jersey [Member]            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Unrealized gains (losses) on real estate held for sale       $ 14,000