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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 | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Securities available for sale, at fair value | $ 341,354 | $ 312,035 | [1]
Investment securities, Amortized Cost | 382,452 | 367,569 |
Investment securities, Gross Unrealized Gains | 474 | 0 |
Investment securities, Gross Unrealized Losses | (41,572) | (55,534) |
Investment securities, Fair Value | 341,354 | 312,035 |
Mortgage Backed Securities [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 219,457 | 199,453 |
Available for sale, Gross Unrealized Gains | 406 | 0 |
Available for sale, Gross Unrealized Losses | (27,369) | (35,015) |
Securities available for sale, at fair value | 192,494 | 164,438 |
U.S. Treasury and Agencies [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 78,905 | 79,430 |
Available for sale, Gross Unrealized Gains | 0 | 0 |
Available for sale, Gross Unrealized Losses | (6,866) | (9,975) |
Securities available for sale, at fair value | 72,039 | 69,455 |
State and Municipal [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 49,352 | 50,233 |
Available for sale, Gross Unrealized Gains | 1 | 0 |
Available for sale, Gross Unrealized Losses | (5,060) | (7,296) |
Securities available for sale, at fair value | 44,293 | 42,937 |
Corporate Bonds [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 34,738 | 38,453 |
Available for sale, Gross Unrealized Gains | 67 | 0 |
Available for sale, Gross Unrealized Losses | (2,277) | (3,248) |
Securities available for sale, at fair value | $ 32,528 | $ 35,205 |
[1] | Derived from audited December 31, 2024 Consolidated Financial Statements.

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