Quarterly report pursuant to Section 13 or 15(d)

Servicing Assets - Additional Information (Detail)

v3.20.2
Servicing Assets - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]          
Serviced loans sold to unaffiliated parties $ 412,300,000   $ 412,300,000   $ 422,300,000
Servicing fee income 1,200,000 $ 1,100,000 2,300,000 $ 2,200,000  
Operating Income          
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]          
Amortization expense $ 433,000 $ 573,000 $ 969,000 $ 1,300,000