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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
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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