XML 84 R73.htm IDEA: XBRL DOCUMENT v3.21.1
Related Parties - Additional Information (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Related Party Transaction [Line Items]      
Fee and other income $ 8,020,000 $ 8,561,000  
Accounts and other receivables, net 12,653,000   $ 17,502,000
Property management, asset management, leasing and other related services fee income 6,670,000 6,330,000  
Transaction related costs 281,000 203,000  
Accounts payable and accrued expenses $ 117,260,000   101,901,000
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 $ 517,000 448,000  
Accounts and other receivables, net 0   34,000
Unconsolidated Joint Ventures and Real Estate Funds [Member] | Management Agreements [Member]      
Related Party Transaction [Line Items]      
Accounts and other receivables, net 4,591,000   5,011,000
Property management, asset management, leasing and other related services fee income $ 5,586,000 5,313,000  
Hamburg Trust Consulting GMBH ("HTC") [Member]      
Related Party Transaction [Line Items]      
Mark-up cost percentage 10.00%    
Transaction related costs $ 122,000 139,000  
Accounts payable and accrued expenses $ 245,000   $ 123,000
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