Investment Securities and Other Investments - Summary of Unrealized Losses (Detail) $ in Thousands	Dec. 31, 2024 USD ($) Security	Dec. 31, 2023 USD ($) Security
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Number of Securities \| Security	226	219
Available-for-sale Securities, Fair Value, Less Than 12 Months	$ 17,480	$ 15,785
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months	(170)	(885)
Available-for-sale Securities, Fair Value, 12 Months or Greater	293,439	300,674
Available-for-sale Securities, Unrealized Losses, 12 months or Greater	(55,364)	(57,700)
Fair Value, Total	310,919	316,459
Unrealized Losses, Total	$ (55,534)	$ (58,585)
State and Municipal [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Number of Securities \| Security	70	65
Available-for-sale Securities, Fair Value, Less Than 12 Months	$ 2,040	$ 536
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months	(42)	(9)
Available-for-sale Securities, Fair Value, 12 Months or Greater	40,531	41,118
Available-for-sale Securities, Unrealized Losses, 12 months or Greater	(7,254)	(7,348)
Fair Value, Total	42,571	41,654
Unrealized Losses, Total	$ (7,296)	$ (7,357)
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	$ 283
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months	0	(1)
Available-for-sale Securities, Fair Value, 12 Months or Greater	69,453	68,399
Available-for-sale Securities, Unrealized Losses, 12 months or Greater	(9,975)	(10,984)
Fair Value, Total	69,453	68,682
Unrealized Losses, Total	$ (9,975)	$ (10,985)
Mortgage Backed Securities [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Number of Securities \| Security	85	86
Available-for-sale Securities, Fair Value, Less Than 12 Months	$ 11,637	$ 7,497
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months	(107)	(45)
Available-for-sale Securities, Fair Value, 12 Months or Greater	152,802	169,474
Available-for-sale Securities, Unrealized Losses, 12 months or Greater	(34,908)	(35,199)
Fair Value, Total	164,439	176,971
Unrealized Losses, Total	$ (35,015)	$ (35,244)
Corporate Bonds [Member]
Schedule Of Available For Sale And Held To Maturity Securities [Line Items]
Number of Securities \| Security	42	39
Available-for-sale Securities, Fair Value, Less Than 12 Months	$ 3,803	$ 7,469
Available-for-sale Securities, Unrealized Losses, Less Than 12 Months	(21)	(830)
Available-for-sale Securities, Fair Value, 12 Months or Greater	30,653	21,683
Available-for-sale Securities, Unrealized Losses, 12 months or Greater	(3,227)	(4,169)
Fair Value, Total	34,456	29,152
Unrealized Losses, Total	$ (3,248)	$ (4,999)

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