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Investments - Summary of Amortized Cost and Fair Values of Investment Securities Available for Sale (Detail) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Securities available for sale, at fair value $ 381,536 $ 373,532 [1]
Investment securities, Amortized Cost 429,530 378,741
Investment securities, Gross Unrealized Gains 350 1,513
Investment securities, Gross Unrealized Losses (48,344) (6,722)
Investment securities, Fair Value 381,536 373,532
State and Municipal [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available for sale, Amortized Cost 60,899 51,341
Available for sale, Gross Unrealized Gains 2 302
Available for sale, Gross Unrealized Losses (7,349) (530)
Securities available for sale, at fair value 53,552 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 72,032 65,680
Available for sale, Gross Unrealized Losses (9,209) (1,614)
Securities available for sale, at fair value 62,823 64,066
Mortgage Backed Securities [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available for sale, Amortized Cost 252,930 222,968
Available for sale, Gross Unrealized Gains 76 403
Available for sale, Gross Unrealized Losses (30,304) (4,261)
Securities available for sale, at fair value 222,702 219,110
Corporate Bonds [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Available for sale, Amortized Cost 43,669 38,752
Available for sale, Gross Unrealized Gains 272 808
Available for sale, Gross Unrealized Losses (1,482) (317)
Securities available for sale, at fair value $ 42,459 $ 39,243
[1] Derived from audited December 31, 2021 Consolidated Financial Statements.