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v3.25.0.1

Investment Securities and Other Investments - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Schedule Of Investments [Line Items] |  |  |
Securities available for sale, at fair value |  | $ 312,035 | $ 321,081
Federal home loan bank stock |  | 9,400 | 12,300
Federal reserve bank stock |  | 9,400 | 5,900
Correspondent bank stock |  | 468 | 468
Unrealized gain position |  | 1,100 | 4,400
Other equity investments |  | 4,800 | 12,900
Impairment charge | $ 8,500 | 8,500 |
Other Investments, Total |  | 19,405 | 29,467
Sale of investment securities |  | 11,900 |
Realized gain on investment |  | 139 |
Federal Reserve Board Bank Term Funding Program [Member] |  |  |
Schedule Of Investments [Line Items] |  |  |
Securities available for sale, at fair value |  | 16,300 |
Debt securities, amortized cost |  | 18,100 |
Borrowings available through discount window |  | 105,700 | 161,000
Advance from federal reserve bank |  | 0 | 0
Bank Term Funding Program Borrowings [Member] | Collateralized Securities [Member] |  |  |
Schedule Of Investments [Line Items] |  |  |
Repaid principal amount | $ 65,000 |  |
Asset Pledged as Collateral without Right [Member] | FHLB [Member] |  |  |
Schedule Of Investments [Line Items] |  |  |
Securities pledged |  | 268,900 | 35,900
Asset Pledged as Collateral without Right [Member] | Bank Term Funding Program Borrowings [Member] |  |  |
Schedule Of Investments [Line Items] |  |  |
Securities available for sale, at fair value |  |  | 218,700
Debt securities, amortized cost |  |  | 262,700
Securities pledged |  |  | 260,900
Asset Pledged as Collateral without Right [Member] | FRB [Member] |  |  |
Schedule Of Investments [Line Items] |  |  |
Securities pledged |  | 16,300 | 0
Third Party Investment Grade [Member] |  |  |
Schedule Of Investments [Line Items] |  |  |
Securities pledged |  | $ 29,300 | $ 20,500

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