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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, 2025	Dec. 31, 2024
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Securities available for sale, at fair value	$ 325,401	$ 312,035	[1]
Investment securities, Amortized Cost	375,712	367,569
Investment securities, Gross Unrealized Gains	71	0
Investment securities, Gross Unrealized Losses	(50,382)	(55,534)
Investment securities, Fair Value	325,401	312,035
Mortgage Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	208,094	199,453
Available for sale, Gross Unrealized Gains	64	0
Available for sale, Gross Unrealized Losses	(32,850)	(35,015)
Securities available for sale, at fair value	175,308	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	79,081	79,430
Available for sale, Gross Unrealized Gains	0	0
Available for sale, Gross Unrealized Losses	(8,465)	(9,975)
Securities available for sale, at fair value	70,616	69,455
State and Municipal [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	50,073	50,233
Available for sale, Gross Unrealized Gains	0	0
Available for sale, Gross Unrealized Losses	(6,372)	(7,296)
Securities available for sale, at fair value	43,701	42,937
Corporate Bonds [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	38,464	38,453
Available for sale, Gross Unrealized Gains	7	0
Available for sale, Gross Unrealized Losses	(2,695)	(3,248)
Securities available for sale, at fair value	$ 35,776	$ 35,205
[1] Derived from audited December 31, 2024 Consolidated Financial Statements.

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