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Related Parties - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Related Party Transaction [Line Items]      
Fee and other income $ 13,763,000 $ 8,020,000  
Accounts and other receivables 11,678,000   $ 15,582,000
Property management, asset management, leasing and other related services fee income 11,988,000 6,670,000  
Accounts payable and accrued expenses 111,171,000   116,192,000
Due from affiliates $ 49,316,000    
712 Fifth Avenue [Member]      
Related Party Transaction [Line Items]      
Equity method paramount ownership percentage 50.00%    
CNBB-RDF Holdings Otto Family [Member] | Management Agreements [Member]      
Related Party Transaction [Line Items]      
Fee and other income $ 489,000 517,000  
Accounts and other receivables 752,000   484,000
Unconsolidated Joint Ventures and Real Estate Funds [Member] | Management Agreements [Member]      
Related Party Transaction [Line Items]      
Accounts and other receivables 2,868,000   2,883,000
Property management, asset management, leasing and other related services fee income $ 10,783,000 5,586,000  
Hamburg Trust Consulting GMBH ("HTC") [Member]      
Related Party Transaction [Line Items]      
Mark-up cost percentage 10.00%    
Transaction related costs $ 389,000 122,000  
Accounts payable and accrued expenses $ 389,000   $ 523,000
Hamburg Trust Consulting GMBH ("HTC") [Member] | Chairman, Chief Executive Officer and President [Member]      
Related Party Transaction [Line Items]      
Percentage of ownership 100.00%    
Mannheim Trust [Member] | Board of Director [Member] | 712 Fifth Avenue [Member]      
Related Party Transaction [Line Items]      
Equity method paramount ownership percentage 50.00%    
Lease rental income $ 91,000 $ 91,000  
Fund X [Member]      
Related Party Transaction [Line Items]      
Due from affiliates $ 49,316,000    
Fund X [Member] | Secured Overnight Financing Rate (SOFR) [Member]      
Related Party Transaction [Line Items]      
Fixed/Variable Rate 2.20%