Investment Securities and Other Investments - Summary of Amortized Cost and Fair Values of Investment Securities Available for Sale (Detail) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Securities available for sale, at fair value	$ 307,427	$ 321,081	[1]
Investment securities, Amortized Cost	364,921	379,654
Investment securities, Gross Unrealized Gains		12
Investment securities, Gross Unrealized Losses	(57,494)	(58,585)
Investment securities, Fair Value	307,427	321,081
Mortgage Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	198,042	212,214
Available for sale, Gross Unrealized Losses	(34,929)	(35,244)
Securities available for sale, at fair value	163,113	176,970
U.S. Treasury and Agencies [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	79,634	79,856
Available for sale, Gross Unrealized Losses	(10,739)	(10,985)
Securities available for sale, at fair value	68,895	68,871
State and Municipal [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	50,356	50,682
Available for sale, Gross Unrealized Losses	(7,353)	(7,357)
Securities available for sale, at fair value	43,003	43,325
Corporate Bonds [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Available for sale, Amortized Cost	36,889	36,902
Available for sale, Gross Unrealized Gains		12
Available for sale, Gross Unrealized Losses	(4,473)	(4,999)
Securities available for sale, at fair value	$ 32,416	$ 31,915

[1] Derived from audited December 31, 2023 Consolidated Financial Statements.