Quarterly report pursuant to Section 13 or 15(d)

Servicing Assets - Additional Information (Detail)

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Servicing Assets - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]          
Serviced loans sold to unaffiliated parties $ 536,100   $ 536,100   $ 539,600
Servicing fee income $ 1,400 $ 1,300 $ 2,700 $ 2,600  
Contractually Specified Servicing Fee Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Noninterest Income, Other Operating Income Noninterest Income, Other Operating Income Noninterest Income, Other Operating Income Noninterest Income, Other Operating Income  
Amortization expense $ 700 $ 600 $ 1,366 $ 1,223  
Fair value of servicing rights 8,100   8,100   $ 7,700
Residential mortgage loans $ 19,500   $ 19,500    
Minimum          
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]          
Discount rates ranging     10.10%   14.40%
Prepayment speeds     11.40%   12.20%
Maximum          
Risks Inherent In Servicing Assets And Servicing Liabilities [Line Items]          
Discount rates ranging     25.50%   24.70%
Prepayment speeds     21.40%   19.70%