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
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Servicing assets $ 6,535 $ 6,459 $ 6,422 $ 6,457
Non-recurring Basis        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Collateral dependent loans 1,104 [1] 12,539 [2]    
Other real estate owned   1,980    
Repossessed personal property 294 588    
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    
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    
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 1,104 [1] 12,539 [2]    
Other real estate owned   1,980    
Repossessed personal property $ 294 $ 588    
[1] Consisted entirely of real estate loans.
[2] Consisted of one real estate loan.