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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 | Mar. 31, 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 | $ 351,990 | $ 354,341 | [1]
Investment securities, Amortized Cost | 405,640 | 413,015 |
Investment securities, Gross Unrealized Gains | 51 | 175 |
Investment securities, Gross Unrealized Losses | (53,701) | (58,849) |
Investment securities, Fair Value | 351,990 | 354,341 |
State and Municipal [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 59,408 | 60,018 |
Available for sale, Gross Unrealized Losses | (7,747) | (9,025) |
Securities available for sale, at fair value | 51,661 | 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 | 72,051 | 80,073 |
Available for sale, Gross Unrealized Losses | (9,898) | (12,911) |
Securities available for sale, at fair value | 62,153 | 67,162 |
Mortgage Backed Securities [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 231,761 | 230,015 |
Available for sale, Gross Unrealized Gains | 19 | 51 |
Available for sale, Gross Unrealized Losses | (32,461) | (33,730) |
Securities available for sale, at fair value | 199,319 | 196,336 |
Corporate Bonds [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 42,420 | 42,909 |
Available for sale, Gross Unrealized Gains | 32 | 124 |
Available for sale, Gross Unrealized Losses | (3,595) | (3,183) |
Securities available for sale, at fair value | $ 38,857 | $ 39,850 |
[1] | Derived from audited December 31, 2022 Consolidated Financial Statements.

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