XML 55 R44.htm IDEA: XBRL DOCUMENT v3.5.0.2
Commitments and Contingencies - Additional Information (Detail) - USD ($)
 9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Loss Contingencies [Line Items]    
Letters of credit outstanding $ 48,000,000  
Accrued loan loss 25,700,000 $ 21,800,000
Assets available for recourse 847,200,000  
Warehouse receivables $ 652,200,000  
Letters of credit expiration date 2017-09  
Guarantees total $ 56,900,000  
Commitments to investment in future real estate investment 28,900,000  
Commitments to investment in unconsolidated real estate subsidiary 24,200,000  
Funded loans subject to loss sharing arrangements [Member]    
Loss Contingencies [Line Items]    
Funded loans unpaid principal 15,000,000,000  
Funded loans not subject to loss sharing arrangements [Member]    
Loss Contingencies [Line Items]    
Letters of credit outstanding $ 42,000,000 $ 35,000,000
Maximum [Member]    
Loss Contingencies [Line Items]    
Co-investments typically range 2.00%