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Loan Servicing Assets - Estimated Amortization Expense (Detail) - Mortgage Servicing Assets [Member] - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Finite Lived Intangible Assets [Line Items]
2025	$ 921
2026	798
2027	674
2028	550
2029	426
Thereafter	534
Total	$ 3,903	$ 4,287	$ 4,931	$ 5,078