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Investment Securities and Other Investments - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023
Schedule Of Investments [Line Items] |  |  |  |
Federal home loan bank stock | $ 11,900 | $ 11,900 | $ 12,300 |
Federal reserve bank stock | 5,900 | 5,900 | 5,900 |
Correspondent bank stock | 468 | 468 | 468 |
Other equity investments | 4,400 | 4,400 | 12,900 |
Securities available for sale, at fair value | 307,427 | 307,427 | 321,081 | [1]
Other Investments, Total | 21,099 | 21,099 | 29,467 | [1]
Sale of investment securities |  | 6,400 |  |
Realized loss on investment |  | (69) |  |
Impairment charge | 8,500 | 8,500 |  |
Asset Pledged as Collateral without Right [Member] | FHLB [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Securities pledged | $ 266,700 | $ 266,700 | 35,900 |
Asset Pledged as Collateral without Right [Member] | Bank Term Funding Program Borrowings [Member] |  |  |  |
Schedule Of Investments [Line Items] |  |  |  |
Securities pledged |  |  | 260,900 |
Debt securities, amortized cost |  |  | 262,700 |
Securities available for sale, at fair value |  |  | $ 218,700 |
[1] | Derived from audited December 31, 2023 Consolidated Financial Statements.

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