XML 62 R49.htm IDEA: XBRL DOCUMENT v3.20.2
Commitments and Contingencies - Additional Information (Detail) - USD ($)
 9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Loss Contingencies [Line Items]    
Letters of credit outstanding $ 104,400,000  
Accrued loan loss 56,500,000 $ 37,000,000.0
Assets available for recourse $ 928,000,000.0  
Letters of credit expiration date 2021-10  
Guarantees total $ 72,400,000  
Commitments to investment in future real estate investment 84,000,000.0  
Commitments to investment in unconsolidated real estate subsidiary $ 41,000,000.0  
Maximum [Member]    
Loss Contingencies [Line Items]    
Co-investments typically range 2.00%  
COVID 19 Pandemic [Member]    
Loss Contingencies [Line Items]    
Advances for principal and interest $ 5,200,000  
Warehouse Receivable [Member]    
Loss Contingencies [Line Items]    
Warehouse receivables 556,400,000  
Funded loans subject to loss sharing arrangements [Member]    
Loss Contingencies [Line Items]    
Funded loans unpaid principal 26,200,000,000  
Letters of credit outstanding 85,000,000.0 72,000,000.0
SBL Program [Member]    
Loss Contingencies [Line Items]    
Letters of credit outstanding $ 5,000,000.0 $ 5,000,000.0
Percentage of maximum original principal amount loan loss 10.00%  
Funded loans not subject to loss sharing arrangements [Member]    
Loss Contingencies [Line Items]    
Letters of credit outstanding $ 90,000,000.0