Available for Sale Securities - Summary of Amortized Costs and Fair Values of Securities Available-for-sale, by Contractual Maturity (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Due in one year or less	$ 1,541
Due after one through 5 years	341
Due after 5 through 10 years	10,718
Due after 10 years	2,256
Total debt and other securities, Fair Value	14,856
Total	106,388	$ 109,559
Due in one year or less	1,560
Due after one through 5 years	340
Due after 5 through 10 years	12,959
Due after 10 years	2,915
Total debt and other securities, Amortized Cost	17,774
Total	116,634
Government-sponsored Mortgage-backed securities [Member]
Debt Securities, Available-for-sale [Line Items]
Total debt and other securities, Fair Value	88,177
Total debt and other securities, Amortized Cost	95,504
Asset-backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Total debt and other securities, Fair Value	3,355
Total	3,355	$ 3,572
Total debt and other securities, Amortized Cost	$ 3,356