XML 89 R78.htm IDEA: XBRL DOCUMENT v3.19.1
Related Parties - Additional Information (Details)
3 Months Ended
Mar. 31, 2019
USD ($)
ft²
Mar. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Related Party Transaction [Line Items]      
Fee and other income $ 9,176,000 $ 6,592,000  
Accounts and other receivables, net 20,136,000   $ 20,076,000
Property management, asset management, leasing and other related services fee income 5,999,000 3,465,000  
Transaction related costs 736,000 120,000  
Accounts payable and accrued expenses $ 125,599,000   124,334,000
Area of related party lease | ft² 12,200,000    
712 Fifth Avenue [Member]      
Related Party Transaction [Line Items]      
Equity method ownership percentage 50.00%    
CNBB-RDF Holdings Otto Family [Member] | Management Agreements [Member]      
Related Party Transaction [Line Items]      
Fee and other income $ 209,000 209,000  
Accounts and other receivables, net 0   51,000
Unconsolidated Joint Ventures and Real Estate Funds [Member] | Management Agreements [Member]      
Related Party Transaction [Line Items]      
Accounts and other receivables, net 1,254,000   1,836,000
Property management, asset management, leasing and other related services fee income $ 4,547,000 2,536,000  
Hamburg Trust Consulting GMBH ("HTC") [Member]      
Related Party Transaction [Line Items]      
Mark-up cost percentage 10.00%    
Transaction related costs $ 624,000 18,000  
Accounts payable and accrued expenses $ 61,000   $ 40,000
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 ownership percentage 50.00%    
Area of related party lease | ft² 5,593    
Lease rental income $ 91,000 $ 92,000  
Fund VIII [Member]      
Related Party Transaction [Line Items]      
Receivables from affiliates $ 11,000,000