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Investment Securities and Other Investments - Summary of Unrealized Losses (Detail) $ in Thousands | Mar. 31, 2025 USD ($) Security | Dec. 31, 2024 USD ($) Security
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Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 222 | 226
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 14,450 | $ 17,480
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (65) | (170)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 295,048 | 293,439
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (50,317) | (55,364)
Fair Value, Total | 309,498 | 310,919
Unrealized Losses, Total | $ (50,382) | $ (55,534)
State and Municipal [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 69 | 70
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 1,686 | $ 2,040
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (10) | (42)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 41,430 | 40,531
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (6,362) | (7,254)
Fair Value, Total | 43,116 | 42,571
Unrealized Losses, Total | $ (6,372) | $ (7,296)
U.S. Treasury and Agencies [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 29 | 29
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 0 | $ 0
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | 0 | 0
Available-for-sale Securities, Fair Value, 12 Months or Greater | 70,615 | 69,453
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (8,465) | (9,975)
Fair Value, Total | 70,615 | 69,453
Unrealized Losses, Total | $ (8,465) | $ (9,975)
Mortgage Backed Securities [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 84 | 85
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 11,008 | $ 11,637
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (53) | (107)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 151,569 | 152,802
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (32,797) | (34,908)
Fair Value, Total | 162,577 | 164,439
Unrealized Losses, Total | $ (32,850) | $ (35,015)
Corporate Bonds [Member] |  |
Schedule Of Available For Sale And Held To Maturity Securities [Line Items] |  |
Number of Securities | Security | 40 | 42
Available-for-sale Securities, Fair Value, Less Than 12 Months | $ 1,756 | $ 3,803
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months | (2) | (21)
Available-for-sale Securities, Fair Value, 12 Months or Greater | 31,434 | 30,653
Available-for-sale Securities, Unrealized Losses, 12 months or Greater | (2,693) | (3,227)
Fair Value, Total | 33,190 | 34,456
Unrealized Losses, Total | $ (2,695) | $ (3,248)

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