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Related Parties - Additional Information (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2025
USD ($)
Jun. 30, 2025
USD ($)
ft²
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
ft²
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Related Party Transaction [Line Items]            
Fee and other income   $ 9,012,000 $ 7,730,000 $ 17,010,000 $ 16,884,000  
Accounts and other receivables   23,824,000   23,824,000   $ 18,229,000
Fee income   4,220,000 4,304,000 9,245,000 10,552,000  
Transaction related costs   709,000 423,000 859,000 601,000  
Accounts payable and accrued expenses   115,688,000   115,688,000   119,881,000
General and administrative   $ 24,311,000 16,632,000 $ 41,772,000 33,266,000  
Area of leased properties | ft²   13,100,000   13,100,000    
Rental revenue   $ 168,033,000 179,678,000 $ 347,054,000 359,401,000  
CNBB-RDF Holdings Otto Family [Member] | Management Agreements [Member]            
Related Party Transaction [Line Items]            
Fee and other income   144,000 190,000 291,000 367,000  
Accounts and other receivables   41,000   41,000   31,000
Unconsolidated Joint Ventures and Real Estate Funds [Member] | Management Agreements [Member]            
Related Party Transaction [Line Items]            
Accounts and other receivables   1,591,000   1,591,000   1,652,000
Fee income   $ 3,213,000 3,447,000 $ 6,513,000 8,810,000  
Hamburg Trust Consulting GMBH ("HTC") [Member]            
Related Party Transaction [Line Items]            
Mark-up cost percentage   10.00%   10.00%    
Transaction related costs   $ 99,000 122,000 $ 219,000 245,000  
Accounts payable and accrued expenses   $ 109,000   $ 109,000   $ 113,000
Hamburg Trust Consulting GMBH ("HTC") [Member] | Chairman, Chief Executive Officer and President [Member]            
Related Party Transaction [Line Items]            
Percentage of ownership   100.00%   100.00%    
Aircraft Services [Member]            
Related Party Transaction [Line Items]            
General and administrative   $ 0 427,000 $ 147,000 804,000  
Aircraft Services [Member] | Chairman, Chief Executive Officer and President [Member]            
Related Party Transaction [Line Items]            
Percentage of ownership   50.00%   50.00%    
Mannheim Trust [Member] | Board of Director [Member] | 712 Fifth Avenue [Member]            
Related Party Transaction [Line Items]            
Lease rental income   $ 30,000 29,000 $ 61,000 59,000  
Mannheim Trust [Member] | Board of Director [Member] | 712 Fifth Avenue [Member] | Lease expiring in June 2025 [Member]            
Related Party Transaction [Line Items]            
Area of leased properties | ft²   3,127   3,127    
Equity method paramount ownership percentage   50.00%   50.00%    
ParkProperty Capital, LP [Member] | Former Board of Directors [Member]            
Related Party Transaction [Line Items]            
Rental revenue   $ 71,000 70,000 $ 142,000 141,000  
ParkProperty Capital, LP [Member] | Former Board of Directors [Member] | 1325 Avenue of the Americas [Member] | Lease expiring in November 2027 [Member]            
Related Party Transaction [Line Items]            
Area of leased properties | ft²   4,233   4,233    
Debevoise and Plimpton LLP [Member]            
Related Party Transaction [Line Items]            
General and administrative   $ 202,000   $ 274,000    
Kramer Design Services [Member]            
Related Party Transaction [Line Items]            
Transaction related costs $ 220,000          
Business development costs incurred     $ 17,000 $ 39,000 $ 42,000  
Kramer Design Services [Member] | Chairman, Chief Executive Officer and President [Member]            
Related Party Transaction [Line Items]            
Percentage of ownership   100.00%   100.00%