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Intangible Assets and Goodwill - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 36,648 | $ 30,783
Accumulated Amortization | (15,785) | (13,217)
Net Carrying Amount | 20,863 | 17,566
Core Deposit Intangibles [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 33,298 | 27,433
Accumulated Amortization | (12,765) | (10,311)
Net Carrying Amount | 20,533 | 17,122
Customer Relationship Intangibles [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 3,350 | 3,350
Accumulated Amortization | (3,020) | (2,906)
Net Carrying Amount | $ 330 | $ 444

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