Annual report pursuant to Section 13 and 15(d)

Servicing Assets - Additional Information (Detail)

v3.22.0.1
Servicing Assets - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]      
Serviced loans sold to unaffiliated parties $ 473.5 $ 429.4  
Fair value of servicing rights $ 8.1 $ 6.9  
Minimum      
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]      
Discount rates ranging 10.40% 9.30%  
Prepayment speeds 10.20% 11.80%  
Maximum      
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]      
Discount rates ranging 16.70% 12.20%  
Prepayment speeds 12.80% 19.10%  
Other Operating Income      
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]      
Servicing fee income $ 4.6 $ 4.2 $ 4.4
Net amortization expense of servicing assets and liabilities $ 2.0 $ 2.0 $ 2.8