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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, 2023
Dec. 31, 2022
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Securities available for sale, at fair value $ 351,990 $ 354,341 [1]
Investment securities, Amortized Cost 405,640 413,015
Investment securities, Gross Unrealized Gains 51 175
Investment securities, Gross Unrealized Losses (53,701) (58,849)
Investment securities, Fair Value 351,990 354,341
State and Municipal [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available for sale, Amortized Cost 59,408 60,018
Available for sale, Gross Unrealized Losses (7,747) (9,025)
Securities available for sale, at fair value 51,661 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 72,051 80,073
Available for sale, Gross Unrealized Losses (9,898) (12,911)
Securities available for sale, at fair value 62,153 67,162
Mortgage Backed Securities [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available for sale, Amortized Cost 231,761 230,015
Available for sale, Gross Unrealized Gains 19 51
Available for sale, Gross Unrealized Losses (32,461) (33,730)
Securities available for sale, at fair value 199,319 196,336
Corporate Bonds [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available for sale, Amortized Cost 42,420 42,909
Available for sale, Gross Unrealized Gains 32 124
Available for sale, Gross Unrealized Losses (3,595) (3,183)
Securities available for sale, at fair value $ 38,857 $ 39,850
[1] Derived from audited December 31, 2022 Consolidated Financial Statements.