Fair Value of Financial Instruments - Assets Measured at Fair Value on Nonrecurring Basis (Detail) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Level 3 [Member] \| Collateral Dependent Loans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	$ 3,779	$ 715
Level 3 [Member] \| Loan Servicing Rights [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	1,287	1,556
Fair Value on Nonrecurring Basis [Member] \| Collateral Dependent Loans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	3,779	715
Fair Value on Nonrecurring Basis [Member] \| Loan Servicing Rights [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	1,287	1,556
Fair Value on Nonrecurring Basis [Member] \| Level 3 [Member] \| Collateral Dependent Loans [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	3,779	715
Fair Value on Nonrecurring Basis [Member] \| Level 3 [Member] \| Loan Servicing Rights [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Assets measured at fair value on a nonrecurring basis, Total	$ 1,287	$ 1,556