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Loans Held for Investment and Allowance for Credit Losses on Loans - Summary of Other Real Estate Owned and Repossessed Assets and Loan Modifications (Detail) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Summary Of Nonperforming And Restructured Assets [Abstract]    
Other real estate owned and repossessed assets $ 53,233 $ 33,665