XML 151 R137.htm IDEA: XBRL DOCUMENT v3.19.1
Note Guarantees (Credit recourse) - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Guarantee on loans sold or serviced with credit recourse        
Guarantor Obligations        
Valuation Allowances And Reserves Balance $ 52,011 $ 57,425 $ 56,230 $ 58,820
Serviced Mortgage Loans        
Guarantor Obligations        
Loans serviced 15,500,000   15,700,000  
Loans with Recourse        
Guarantor Obligations        
Loans serviced 1,300,000   $ 1,300,000  
Loans with Recourse | Serviced Mortgage Loans        
Guarantor Obligations        
Repurchased Loans $ 8,000 $ 8,000