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Related Parties - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
ft²
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
ft²
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
ft²
Related Party Transaction [Line Items]          
Fee and other income $ 6,666,000 $ 7,897,000 $ 20,583,000 $ 29,934,000  
Accounts and other receivables 14,340,000   14,340,000   $ 23,866,000
Fee income 4,573,000 5,132,000 14,106,000 23,094,000  
Transaction related costs 132,000 105,000 323,000 381,000  
Accounts payable and accrued expenses $ 109,471,000   $ 109,471,000   123,176,000
Area of leased properties | ft² 13,800,000   13,800,000    
Rental revenue $ 182,515,000 179,250,000 $ 529,734,000 526,415,000  
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 $ 262,000 272,000 $ 791,000 1,021,000  
Accounts and other receivables 47,000   47,000   52,000
Unconsolidated Joint Ventures and Real Estate Funds [Member] | Management Agreements [Member]          
Related Party Transaction [Line Items]          
Accounts and other receivables 2,479,000   2,479,000   3,032,000
Fee income $ 3,585,000 4,277,000 $ 11,288,000 20,075,000  
Hamburg Trust Consulting GMBH ("HTC") [Member]          
Related Party Transaction [Line Items]          
Mark-up cost percentage 10.00%   10.00%    
Transaction related costs $ 102,000 105,000 $ 293,000 621,000  
Accounts payable and accrued expenses $ 205,000   $ 205,000   $ 119,000
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 91,000 $ 154,000 273,000  
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 $ 69,000 $ 53,000 $ 207,000 $ 161,000  
ParkProperty Capital LP [Member] | Board of Director [Member] | 1633 Broadway [Member]          
Related Party Transaction [Line Items]          
Area of leased properties | ft² 3,330   3,330    
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
Lease term         5 years
Kramer Design Services [Member]          
Related Party Transaction [Line Items]          
Business development costs incurred $ 19,000   $ 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%