Quarterly report [Sections 13 or 15(d)]

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail)

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - USD ($)
$ in Thousands
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Servicing assets $ 6,484 $ 6,420 $ 6,457 $ 6,683 $ 6,836 $ 7,070
Non-recurring Basis            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans 11,821 [1]   3,467 [2]      
Other real estate owned 1,995   117      
Repossessed personal property 412   568      
Non-recurring Basis | Quoted Prices in Active Markets for Identical Assets            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans 0 [1]   0 [2]      
Other real estate owned 0   0      
Repossessed personal property 0   0      
Non-recurring Basis | Significant Observable Inputs with No Active Market with Identical Characteristics            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans 0 [1]   0 [2]      
Other real estate owned 0   0      
Repossessed personal property 0   0      
Non-recurring Basis | Significant Unobservable Inputs            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans 11,821 [1]   3,467 [2]      
Other real estate owned 1,995   117      
Repossessed personal property $ 412   $ 568      
[1] Consisted of real estate loans of $11.8 million.
[2] Consisted of real estate loans of $3.5 million.