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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)

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