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Investment Securities and Other Investments - Summary of Amortized Cost and Fair Values of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
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Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Securities available for sale, at fair value | $ 340,617 | $ 354,341 | [1]
Investment securities, Amortized Cost | 400,735 | 413,015 |
Investment securities, Gross Unrealized Gains | 9 | 175 |
Investment securities, Gross Unrealized Losses | (60,127) | (58,849) |
Investment securities, Fair Value | 340,617 | 354,341 |
State and Municipal [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 59,303 | 60,018 |
Available for sale, Gross Unrealized Losses | (8,394) | (9,025) |
Securities available for sale, at fair value | 50,909 | 50,993 |
U.S. Treasury and Agencies [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 72,057 | 80,073 |
Available for sale, Gross Unrealized Losses | (11,355) | (12,911) |
Securities available for sale, at fair value | 60,702 | 67,162 |
Mortgage Backed Securities [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 227,961 | 230,015 |
Available for sale, Gross Unrealized Gains | 9 | 51 |
Available for sale, Gross Unrealized Losses | (35,928) | (33,730) |
Securities available for sale, at fair value | 192,042 | 196,336 |
Corporate Bonds [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 41,414 | 42,909 |
Available for sale, Gross Unrealized Gains |  | 124 |
Available for sale, Gross Unrealized Losses | (4,450) | (3,183) |
Securities available for sale, at fair value | $ 36,964 | $ 39,850 |
[1] | Derived from audited December 31, 2022 Consolidated Financial Statements.

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