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Investment Securities and Other Investments - Summary of Unrealized Losses (Detail) $ in Thousands | Mar. 31, 2023 USD ($) Security | Dec. 31, 2022 USD ($) Security
--- | --- | ---
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 221 | 221
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 40,426 | $ 93,180
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (2,344) | (8,561)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 296,554 | 242,340
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (51,357) | (50,288)
Fair Value, Total | 336,980 | 335,520
Unrealized Losses, Total | $ (53,701) | $ (58,849)
State and Municipal [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 80 | 82
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 3,265 | $ 18,252
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (92) | (2,178)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 46,807 | 31,530
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (7,655) | (6,847)
Fair Value, Total | 50,072 | 49,782
Unrealized Losses, Total | $ (7,747) | $ (9,025)
U.S. Treasury and Agencies [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 26 | 28
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 4,885 | $ 9,904
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (115) | (1,039)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 57,264 | 56,686
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (9,783) | (11,872)
Fair Value, Total | 62,149 | 66,590
Unrealized Losses, Total | $ (9,898) | $ (12,911)
Mortgage Backed Securities [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 81 | 78
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 11,475 | $ 39,006
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (408) | (3,061)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 179,759 | 148,449
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (32,053) | (30,669)
Fair Value, Total | 191,234 | 187,455
Unrealized Losses, Total | $ (32,461) | $ (33,730)
Corporate Bonds [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 34 | 33
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 20,801 | $ 26,018
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (1,729) | (2,283)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 12,724 | 5,675
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (1,866) | (900)
Fair Value, Total | 33,525 | 31,693
Unrealized Losses, Total | $ (3,595) | $ (3,183)

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