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Allowance for Credit Losses - Additional Information (Detail)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Loan
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Loan
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Accounts Notes And Loans Receivable [Line Items]          
Provision for credit losses $ 1,171,000 $ 1,800,000 $ 2,419,000 $ 3,842,000  
Allowance for credit losses 1,171,000 1,800,000 $ 2,419,000 3,842,000  
Number of days reaching where loans are considered for nonaccrual status     90 days    
Conditions where loans are considered for nonaccrual status     A loan may be returned to accruing status only if one of two conditions are met: the loan is well-secured and none of the principal and interest has been past due for a minimum of 90 days or the principal and interest payments are reasonably assured and a sustained period of performance has occurred, generally six months.    
Loans modified as troubled debt restructuring 0 $ 0 $ 0 $ 0  
Individually evaluated loans     greater than $350    
Residential mortgages in process of foreclosure $ 906,000   $ 906,000   $ 669,000
Number of loan modified | Loan 1   1