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Related Parties - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2024
USD ($)
ft²
Sep. 30, 2023
USD ($)
Sep. 30, 2024
USD ($)
ft²
Sep. 30, 2023
USD ($)
Dec. 31, 2023
USD ($)
Related Party Transaction [Line Items]          
Fee and other income $ 10,664,000 $ 6,666,000 $ 27,548,000 $ 20,583,000  
Accounts and other receivables 18,662,000   18,662,000   $ 18,053,000
Fee income 6,776,000 4,573,000 17,328,000 14,106,000  
Transaction related costs 242,000 132,000 843,000 323,000  
Accounts payable and accrued expenses $ 114,808,000   $ 114,808,000   114,463,000
Area of leased properties | ft² 13,800,000   13,800,000    
Rental revenue $ 184,235,000 182,515,000 $ 543,636,000 529,734,000  
712 Fifth Avenue [Member]          
Related Party Transaction [Line Items]          
Equity method paramount ownership percentage 50.00%   50.00%    
CNBB-RDF Holdings Otto Family [Member] | Management Agreements [Member]          
Related Party Transaction [Line Items]          
Fee and other income $ 195,000 262,000 $ 562,000 791,000  
Accounts and other receivables 52,000   52,000   40,000
Unconsolidated Joint Ventures and Real Estate Funds [Member] | Management Agreements [Member]          
Related Party Transaction [Line Items]          
Accounts and other receivables 1,520,000   1,520,000   2,552,000
Fee income $ 5,404,000 3,585,000 $ 14,214,000 11,288,000  
Hamburg Trust Consulting GMBH ("HTC") [Member]          
Related Party Transaction [Line Items]          
Mark-up cost percentage 10.00%   10.00%    
Transaction related costs $ 141,000 102,000 $ 386,000 293,000  
Accounts payable and accrued expenses $ 120,000   $ 120,000   $ 102,000
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%    
Mannheim Trust [Member] | Board of Director [Member] | 712 Fifth Avenue [Member]          
Related Party Transaction [Line Items]          
Lease rental income $ 30,000 30,000 $ 89,000 154,000  
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] | Board of Director [Member]          
Related Party Transaction [Line Items]          
Rental revenue $ 71,000 69,000 $ 212,000 207,000  
ParkProperty Capital LP [Member] | Board of Director [Member] | 1325 Avenue of the Americas [Member]          
Related Party Transaction [Line Items]          
Area of leased properties | ft² 4,233   4,233    
Kramer Design Services [Member]          
Related Party Transaction [Line Items]          
Business development costs incurred   $ 19,000 $ 42,000 $ 103,000  
Kramer Design Services [Member] | Chairman, Chief Executive Officer and President [Member]          
Related Party Transaction [Line Items]          
Percentage of ownership 100.00%   100.00%