Annual report pursuant to Section 13 and 15(d)

INVESTMENTS IN RENTAL PROPERTY - Schedule of Disposed Properties (Details)

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INVESTMENTS IN RENTAL PROPERTY - Schedule of Disposed Properties (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
USD ($)
ft²
building
shares
Dec. 31, 2022
USD ($)
ft²
building
Dec. 31, 2021
USD ($)
ft²
building
shares
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Loss from extinguishment of debt, net $ (5,606) $ (129) $ (47,078)
Redemption of limited partners common units (in shares) | shares 9,229    
111 River Street      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Loss from extinguishment of debt   150,000  
Loss from extinguishment of debt, net   6,300  
101 Hudson Street      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Loss from extinguishment of debt   250,000  
Loss from extinguishment of debt, net   $ 1,000  
Disposal Group, Disposed of by Sale, Not Discontinued Operations      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building 7 2 16
Area of property (in square feet) | ft² 2,468,656,000 1,812,498,000 3,049,313
Net Sales Proceeds $ 515,833 $ 550,846 $ 711,271
Net Carrying Value $ 511,976 $ 476,630 682,696
Realized Gains (Losses)/ Unrealized Losses, net     $ 3,023
Disposal Group, Disposed of by Sale, Not Discontinued Operations | XS Hotels      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building 2    
Area of property (in square feet) | ft² 0    
Net Sales Proceeds $ 93,358    
Net Carrying Value 92,578    
Loss from extinguishment of debt $ 84,000    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Harborside 1, 2 and 3      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building 3    
Area of property (in square feet) | ft² 1,886,800,000    
Net Sales Proceeds $ 362,446    
Net Carrying Value $ 362,304    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Harborside 6      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building 1    
Area of property (in square feet) | ft² 231,856,000    
Net Sales Proceeds $ 44,145    
Net Carrying Value $ 43,722    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 23 Main Street      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building 1    
Area of property (in square feet) | ft² 350,000,000    
Net Sales Proceeds $ 15,884    
Net Carrying Value 13,372    
Deposits received 1,300    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 111 River Street      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building   1  
Area of property (in square feet) | ft²   566,215,000  
Net Sales Proceeds   $ 208,268  
Net Carrying Value   $ 206,432  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 101 Hudson Street      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building   1  
Area of property (in square feet) | ft²   1,246,283,000  
Net Sales Proceeds   $ 342,578  
Net Carrying Value   270,198  
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 100 Overlook Center      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building     1
Area of property (in square feet) | ft²     149,600
Net Sales Proceeds     $ 34,724
Net Carrying Value     26,488
Realized Gains (Losses)/ Unrealized Losses, net     $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Metropark Portfolio      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building     4
Area of property (in square feet) | ft²     926,656
Net Sales Proceeds     $ 247,351
Net Carrying Value     233,826
Realized Gains (Losses)/ Unrealized Losses, net     $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Short Hills Portfolio      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building     4
Area of property (in square feet) | ft²     828,413
Net Sales Proceeds     $ 248,664
Net Carrying Value     245,800
Realized Gains (Losses)/ Unrealized Losses, net     $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Red Bank portfolio      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building     5
Area of property (in square feet) | ft²     659,490
Net Sales Proceeds     $ 80,730
Net Carrying Value     78,364
Realized Gains (Losses)/ Unrealized Losses, net     $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Retail land leases      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building     0
Area of property (in square feet) | ft²     0
Net Sales Proceeds     $ 41,958
Net Carrying Value     37,951
Realized Gains (Losses)/ Unrealized Losses, net     $ 4,007
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 7 Giralda Farms      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building     1
Area of property (in square feet) | ft²     236,674
Net Sales Proceeds     $ 28,182
Net Carrying Value     30,143
Realized Gains (Losses)/ Unrealized Losses, net     $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | 4 Gatehall Drive      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building     1
Area of property (in square feet) | ft²     248,480
Net Sales Proceeds     $ 24,239
Net Carrying Value     23,717
Realized Gains (Losses)/ Unrealized Losses, net     $ 0
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Retail land lease Unit B      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Number of buildings on properties sold | building     0
Area of property (in square feet) | ft²     0
Net Sales Proceeds     $ 5,423
Net Carrying Value     6,407
Realized Gains (Losses)/ Unrealized Losses, net     (984)
Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net 2,411 61,676 25,552
Disposed of by Sale | XS Hotels      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net 780    
Disposed of by Sale | Harborside 1, 2 and 3      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net 142    
Disposed of by Sale | Harborside 6      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net 423    
Disposed of by Sale | 23 Main Street      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net 2,512    
Disposed of by Sale | Other Properties      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net 2,184    
Disposed of by Sale | Unrealized gains (losses) on real estate held for sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net $ (3,630) (12,540)  
Disposed of by Sale | 111 River Street      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net   1,836  
Disposed of by Sale | 101 Hudson Street      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net   $ 72,380  
Disposed of by Sale | 100 Overlook Center      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net     8,236
Disposed of by Sale | Metropark Portfolio      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net     13,525
Disposed of by Sale | Short Hills Portfolio      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net     2,864
Disposed of by Sale | Red Bank portfolio      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net     2,366
Disposed of by Sale | Retail land leases      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net     0
Disposed of by Sale | 7 Giralda Farms      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net     (1,961)
Disposed of by Sale | 4 Gatehall Drive      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net     522
Disposed of by Sale | Retail land lease Unit B      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Discontinued Operations Realized Gains (losses)/ Unrealized Losses, net     $ 0
Disposal Group, Not Discontinued Operations | 100 Overlook Center      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Redemption of limited partners common units (in shares) | shares     678,302
Value of units redeemed     $ 10,500
Disposal Group, Not Discontinued Operations | Metropark Portfolio      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Notes receivable to an affiliate     10,000
Disposal Group, Not Discontinued Operations | Short Hills Portfolio      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Extinguishment of debt, net     $ 22,600