Quarterly report [Sections 13 or 15(d)]

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

v3.26.3
Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale $ 31,242 $ 16,969 $ 7,403 $ 6,512 $ 49,611 $ 8,579
Servicing assets 6,693 $ 6,419 6,459 $ 6,484 $ 6,420 $ 6,457
Commercial Real Estate [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 18,000          
Non-recurring Basis            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans [1]     12,539      
Other real estate owned 1,084   1,980      
Repossessed personal property 293   588      
Non-recurring Basis | Commercial Real Estate [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 18,011          
Non-recurring Basis | Residential Mortgage [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 2,211          
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 [1]     0      
Other real estate owned 0   0      
Repossessed personal property 0   0      
Non-recurring Basis | Quoted Prices in Active Markets for Identical Assets | Commercial Real Estate [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 0          
Non-recurring Basis | Quoted Prices in Active Markets for Identical Assets | Residential Mortgage [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 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 [1]     0      
Other real estate owned 0   0      
Repossessed personal property 0   0      
Non-recurring Basis | Significant Observable Inputs with No Active Market with Identical Characteristics | Commercial Real Estate [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 18,011          
Non-recurring Basis | Significant Observable Inputs with No Active Market with Identical Characteristics | Residential Mortgage [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 0          
Non-recurring Basis | Significant Unobservable Inputs            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Collateral dependent loans [1]     12,539      
Other real estate owned 1,084   1,980      
Repossessed personal property 293   $ 588      
Non-recurring Basis | Significant Unobservable Inputs | Commercial Real Estate [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale 0          
Non-recurring Basis | Significant Unobservable Inputs | Residential Mortgage [Member]            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale $ 2,211          
[1] Consisted entirely of real estate loans.