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Investments - Summary of Amortized Cost and Fair Values of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
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Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost |  | $ 378,741 |
Available for sale, Gross Unrealized Gains |  | 1,513 |
Available for sale, Gross Unrealized Losses |  | (6,722) |
Securities available for sale, at fair value | $ 375,484 | 373,532 | [1]
Investment securities, Amortized Cost | 403,206 |  |
Investment securities, Gross Unrealized Gains | 655 |  |
Investment securities, Gross Unrealized Losses | (28,377) |  |
Investment securities, Fair Value | 375,484 |  |
State and Municipal [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 58,962 | 51,341 |
Available for sale, Gross Unrealized Gains | 5 | 302 |
Available for sale, Gross Unrealized Losses | (4,041) | (530) |
Securities available for sale, at fair value | 54,926 | 51,113 |
U.S. Treasury and Agencies [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 75,402 | 65,680 |
Available for sale, Gross Unrealized Gains |  | 0 |
Available for sale, Gross Unrealized Losses | (5,683) | (1,614) |
Securities available for sale, at fair value | 69,719 | 64,066 |
Mortgage Backed Securities [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 225,163 | 222,968 |
Available for sale, Gross Unrealized Gains | 78 | 403 |
Available for sale, Gross Unrealized Losses | (18,106) | (4,261) |
Securities available for sale, at fair value | 207,135 | 219,110 |
Corporate Bonds [Member] |  |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |  |
Available for sale, Amortized Cost | 43,679 | 38,752 |
Available for sale, Gross Unrealized Gains | 572 | 808 |
Available for sale, Gross Unrealized Losses | (547) | (317) |
Securities available for sale, at fair value | $ 43,704 | $ 39,243 |
[1] | Derived from audited December 31, 2021 Consolidated Financial Statements.

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