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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Goodwill [Line Items] |  |  |  |
Goodwill impairment | $ 26,800 | $ 26,826 | $ 0 | $ 0
Goodwill |  | 0 | 26,826 |
Accumulated amortization of intangibles |  | 8,206 | 6,325 |
Intangible amortization |  | 1,295 | 1,525 | $ 1,671
Mortgage servicing asset |  | 27,100 | 29,000 |
Loan Servicing Assets Included In Other Amortization Intangibles [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Accumulated amortization of intangibles |  | 1,300 | 876 |
Loan Servicing Assets Included In Interest And Fees On Loans [Member] |  |  |  |
Goodwill [Line Items] |  |  |  |
Amortization of intangible assets included in interest and fees |  | 216 | 306 |
Intangible amortization |  | $ 679 | $ 820 |

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