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Investment Securities and Other Investments - Summary of Unrealized Losses (Detail)
$ in Thousands
Jun. 30, 2023
USD ($)
Security
Dec. 31, 2022
USD ($)
Security
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Number of Securities | Security 222 221
Available-for-sale Securities, Fair Value, Less Than 12 Months $ 21,215 $ 93,180
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months (2,046) (8,561)
Available-for-sale Securities, Fair Value, 12 Months or Greater 302,202 242,340
Available-for-sale Securities, Unrealized Losses, 12 months or Greater (58,081) (50,288)
Fair Value, Total 323,417 335,520
Unrealized Losses, Total $ (60,127) $ (58,849)
State and Municipal [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Number of Securities | Security 82 82
Available-for-sale Securities, Fair Value, Less Than 12 Months $ 2,900 $ 18,252
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months (74) (2,178)
Available-for-sale Securities, Fair Value, 12 Months or Greater 47,119 31,530
Available-for-sale Securities, Unrealized Losses, 12 months or Greater (8,320) (6,847)
Fair Value, Total 50,019 49,782
Unrealized Losses, Total $ (8,394) $ (9,025)
U.S. Treasury and Agencies [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Number of Securities | Security 23 28
Available-for-sale Securities, Fair Value, Less Than 12 Months   $ 9,904
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months   (1,039)
Available-for-sale Securities, Fair Value, 12 Months or Greater $ 60,699 56,686
Available-for-sale Securities, Unrealized Losses, 12 months or Greater (11,355) (11,872)
Fair Value, Total 60,699 66,590
Unrealized Losses, Total $ (11,355) $ (12,911)
Mortgage Backed Securities [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Number of Securities | Security 84 78
Available-for-sale Securities, Fair Value, Less Than 12 Months $ 5,420 $ 39,006
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months (367) (3,061)
Available-for-sale Securities, Fair Value, 12 Months or Greater 178,615 148,449
Available-for-sale Securities, Unrealized Losses, 12 months or Greater (35,561) (30,669)
Fair Value, Total 184,035 187,455
Unrealized Losses, Total $ (35,928) $ (33,730)
Corporate Bonds [Member]    
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]    
Number of Securities | Security 33 33
Available-for-sale Securities, Fair Value, Less Than 12 Months $ 12,895 $ 26,018
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months (1,605) (2,283)
Available-for-sale Securities, Fair Value, 12 Months or Greater 15,769 5,675
Available-for-sale Securities, Unrealized Losses, 12 months or Greater (2,845) (900)
Fair Value, Total 28,664 31,693
Unrealized Losses, Total $ (4,450) $ (3,183)