Quarterly report pursuant to Section 13 or 15(d)

Finance Receivables - Special Product (New Neighbor Guaranty program) - Additional Information (Detail)

v3.19.1
Finance Receivables - Special Product (New Neighbor Guaranty program) - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2019
Dec. 31, 2018
Special Product [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Delinquent assessments maximum due period purchases basis 48 months  
Maximum future contingent payments   $ 249,000
New Neighbor Guaranty (NNG) [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Allowance for credit losses $ 20,000 $ 41,000