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Goodwill and Other Intangible Assets - Estimated Amortization Expense for Core Deposit and Customer Related Intangibles (Detail)
$ in Thousands
Dec. 31, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2021 $ 923
2022 666
2023 409
2024 267
2025 144
Thereafter 49
Total $ 2,458