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Goodwill and Other Intangible Assets - Schedule of Estimated Future Amortization Expense (Detail) - Core Deposits
$ in Thousands
Sep. 30, 2022
USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]  
2022 $ 581
2023 2,029
2024 1,737
2025 1,465
2026 1,193
2027 $ 955